Sci and com names exported January 2019.
- Abditomys latidens – Luzon broad-toothed rat
- Abeomelomys sevia – Menzies' mouse
- Abrawayaomys chebezi
- Abrawayaomys ruschii – Ruschi's rat
- Abrocoma bennettii – Bennett's chinchilla rat
- Abrocoma boliviensis – Bolivian chinchilla rat
- Abrocoma budini – Budin's chinchilla rat
- Abrocoma cinerea – Ashy chinchilla rat
- Abrocoma famatina – Famatina chinchilla rat
- Abrocoma schistacea
- Abrocoma uspallata – Uspallata chinchilla rat
- Abrocoma vaccarum – Mendozan chinchilla rat
- Abrothrix andina
- Abrothrix hershkovitzi
- Abrothrix hirta
- Abrothrix illutea
- Abrothrix jelskii – Jelski's altiplano mouse
- Abrothrix lanosa
- Abrothrix longipilis – Long-haired akodont
- Abrothrix manni
- Abrothrix olivacea
- Abrothrix sanborni – Sanborn's grass mouse
- Acerodon celebensis – Sulawesi fruit bat
- Acerodon humilis – Talaud fruit bat
- Acerodon jubatus – Golden-capped fruit bat
- Acerodon leucotis – Palawan fruit bat
- Acerodon mackloti – Sunda fruit bat
- Acinonyx jubatus – Cheetah
- Acomys cahirinus – Cairo spiny mouse
- Acomys chudeaui
- Acomys cilicicus – Asia minor spiny mouse
- Acomys cineraceus – Gray spiny mouse
- Acomys dimidiatus – Arabian spiny mouse
- Acomys ignitus – Fiery spiny mouse
- Acomys johannis – Johan's spiny mouse
- Acomys kempi – Kemp's spiny mouse
- Acomys louisae – Louise's spiny mouse
- Acomys minous – Crete spiny mouse
- Acomys mullah – Mullah spiny mouse
- Acomys muzei
- Acomys nesiotes – Cyprus spiny mouse
- Acomys ngurui
- Acomys percivali – Percival's spiny mouse
- Acomys russatus – Golden spiny mouse
- Acomys selousi
- Acomys seurati – Seurat's spiny mouse
- Acomys spinosissimus – Spiny mouse
- Acomys subspinosus – Cape spiny mouse
- Acomys wilsoni – Wilson's spiny mouse
- Aconaemys fuscus – Chilean rock rat
- Aconaemys porteri – Porter's rock rat
- Aconaemys sagei – Sage's rock rat
- Acrobates frontalis
- Acrobates pygmaeus – Feathertail glider
- Acrocodia indicus – Malay tapir
- Addax nasomaculatus – Addax
- Aegialomys baroni
- Aegialomys galapagoensis – Galapagos rice rat
- Aegialomys ica
- Aegialomys xanthaeolus – Yellowish rice rat
- Aeorestes cinereus
- Aeorestes egregius
- Aeorestes semotus
- Aeorestes villosissimus
- Aepeomys lugens – Olive montane mouse
- Aepeomys reigi – Reig's aepeomys
- Aepyceros melampus – Impala
- Aepyprymnus rufescens – Rufous bettong
- Aeretes melanopterus – Northern chinese flying squirrel
- Aeromys tephromelas – Black flying squirrel
- Aeromys thomasi – Thomas's flying squirrel
- Aethalops aequalis – Borneo fruit bat
- Aethalops alecto – Pygmy fruit bat
- Aethomys bocagei – Bocage's rock rat
- Aethomys chrysophilus – Red rock rat
- Aethomys hindei – Hinde's rock rat
- Aethomys ineptus – Tete veld aethomys
- Aethomys kaiseri – Kaiser's rock rat
- Aethomys nyikae – Nyika rock rat
- Aethomys silindensis – Selinda veld rat
- Aethomys stannarius – Tinfields rock rat
- Aethomys thomasi – Thomas's rock rat
- Ailuropoda melanoleuca – Giant panda
- Ailurops furvus
- Ailurops melanotis – Talaud bear cuscus
- Ailurops ursinus – Bear cuscus
- Ailurus fulgens – Red panda
- Akodon aerosus – Highland grass mouse
- Akodon affinis – Colombian grass mouse
- Akodon albiventer – White-bellied grass mouse
- Akodon azarae – Azara's grass mouse
- Akodon baliolus
- Akodon boliviensis – Bolivian grass mouse
- Akodon budini – Budin's grass mouse
- Akodon caenosus
- Akodon cursor – Cursor grass mouse
- Akodon dayi – Day's grass mouse
- Akodon dolores – Córdoba akodont
- Akodon fumeus – Smoky grass mouse
- Akodon iniscatus – Intelligent grass mouse
- Akodon josemariarguedasi
- Akodon juninensis – Junin grass mouse
- Akodon kofordi – Koford's grass mouse
- Akodon lindberghi – Lindbergh's grass mouse
- Akodon lutescens – Altiplano grass mouse
- Akodon mimus – Thespian grass mouse
- Akodon mollis – Soft grass mouse
- Akodon montensis – Montane akodont
- Akodon mystax – Caparaó akodont
- Akodon orientalis
- Akodon orophilus – El dorado grass mouse
- Akodon paranaensis – Paraná akodont
- Akodon pervalens – Tarija akodont
- Akodon philipmyersi
- Akodon polopi
- Akodon reigi – Reig's akodont
- Akodon sanctipaulensis – Sao paulo grass mouse
- Akodon siberiae – Cochabamba grass mouse
- Akodon simulator – Gray-bellied grass mouse
- Akodon spegazzinii – Spegazzini's grass mouse
- Akodon subfuscus – Puno grass mouse
- Akodon surdus – Silent grass mouse
- Akodon sylvanus – Forest grass mouse
- Akodon toba – Chaco grass mouse
- Akodon torques – Cloud forest grass mouse
- Akodon varius – Variable grass mouse
- Alcelaphus buselaphus – Hartebeest
- Alces alces – Moose
- Alexandromys evoronensis – Evoron vole
- Alexandromys fortis
- Alexandromys gromovi
- Alexandromys kikuchii
- Alexandromys limnophilus
- Alexandromys maximowiczii
- Alexandromys middendorffii
- Alexandromys mongolicus – Mongolian vole
- Alexandromys montebelli – Japanese grass vole
- Alexandromys mujanensis – Muisk vole
- Alexandromys oeconomus
- Alexandromys sachalinensis – Sakhalin vole
- Alionycteris paucidentata – Mindanao pygmy fruit bat
- Allactaga major – Great jerboa
- Allactaga severtzovi – Svertzov's jerboa
- Allactodipus bobrinskii – Bobrinski's jerboa
- Allenopithecus nigroviridis – Allen's swamp monkey
- Allocebus trichotis – Hairy-eared dwarf lemur
- Allochrocebus lhoesti
- Allochrocebus preussi
- Allochrocebus solatus
- Allocricetulus curtatus – Mongolian hamster
- Allocricetulus eversmanni – Eversmann's hamster
- Alouatta arctoidea – Ursine howler monkey
- Alouatta belzebul – Red-handed howler monkey
- Alouatta caraya – Black-and-gold howler monkey
- Alouatta discolor – Spix's red-handed howler monkey
- Alouatta guariba – Brown howler
- Alouatta macconnelli – Guianan red howler monkey
- Alouatta nigerrima – Black howler monkey
- Alouatta palliata – Mantled howler monkey
- Alouatta pigra – Yucatán black howler monkey
- Alouatta sara – Bolivian red howler monkey
- Alouatta seniculus
- Alouatta ululata – Maranhão red-handed howler monkey
- Alticola albicaudus – White-tailed mountain vole
- Alticola argentatus – Silver mountain vole
- Alticola barakshin – Gobi altai mountain vole
- Alticola lemminus – Lemming vole
- Alticola montosa – Central kashmir vole
- Alticola olchonensis – Olkhon mountain vole
- Alticola roylei – Royle's mountain vole
- Alticola semicanus – Mongolian silver vole
- Alticola stoliczkanus – Stoliczka's mountain vole
- Alticola stracheyi
- Alticola strelzowi – Flat-headed vole
- Alticola tuvinicus – Tuva silver vole
- Amblysomus corriae – Fynbos golden mole
- Amblysomus hottentotus – Hottentot golden mole
- Amblysomus marleyi – Marley's golden mole
- Amblysomus robustus – Robust golden mole
- Amblysomus septentrionalis – Highveld golden mole
- Ametrida centurio – Little white-shouldered bat
- Ammelaphus imberbis – Lesser kudu
- Ammodillus imbellis – Ammodile
- Ammodorcas clarkei – Dibatag
- Ammospermophilus harrisii – Harris's antelope squirrel
- Ammospermophilus interpres – Texas antelope squirrel
- Ammospermophilus leucurus – White-tailed antelope squirrel
- Ammospermophilus nelsoni – Nelson's antelope squirrel
- Ammotragus lervia – Aoudad
- Amorphochilus schnablii – Smoky bat
- Amphinectomys savamis – Ucayali water rat
- Anathana ellioti – Madras treeshrew
- Andalgalomys olrogi – Olrog's pericote
- Andalgalomys pearsoni – Pearson's chaco mouse
- Andalgalomys roigi
- Andinomys edax – Andean mouse
- Anisomys imitator – Uneven-toothed rat
- Anomalurus beecrofti – Beecroft's scaly-tailed squirrel
- Anomalurus derbianus – Lord derby's scaly-tailed squirrel
- Anomalurus pelii – Pel's flying squirrel
- Anomalurus pusillus – Dwarf scaly-tailed squirrel
- Anonymomys mindorensis – Mindoro forest anonymomys
- Anotomys leander – Ecuadoran ichthyomyine
- Anoura aequatoris
- Anoura cadenai
- Anoura carishina
- Anoura caudifer – Tailed tailless bat
- Anoura cultrata – Handley's tailless bat
- Anoura fistulata – Tube-lipped tailless bat
- Anoura geoffroyi – Geoffroy's tailless bat
- Anoura latidens – Broad-toothed tailless bat
- Anoura luismanueli – Luis manuel's tailless bat
- Anoura peruana
- Anourosorex assamensis – Assam mole shrew
- Anourosorex schmidi – Giant mole shrew
- Anourosorex squamipes – Mole-shrew
- Anourosorex yamashinai – Taiwanese mole shrew
- Antechinomys laniger – Kultarr
- Antechinus adustus – Rusty antechinus
- Antechinus agilis – Agile antechinus
- Antechinus argentus
- Antechinus arktos
- Antechinus bellus – Fawn antechinus
- Antechinus flavipes – Yellow-footed antechinus
- Antechinus godmani – Atherton antechinus
- Antechinus leo – Cinnamon antechinus
- Antechinus mimetes
- Antechinus minimus – Swamp antechinus
- Antechinus mysticus
- Antechinus stuartii – Brown antechinus
- Antechinus subtropicus – Subtropical antechinus
- Antechinus swainsonii – Dusky antechinus
- Antechinus vandycki
- Anthops ornatus – Solomons leaf-nosed bat
- Antidorcas marsupialis – Springbok
- Antilocapra americana – Pronghorn
- Antilope cervicapra – Blackbuck
- Antrozous pallidus – Pallid bat
- Aonyx capensis – African clawless otter
- Aonyx cinereus
- Aonyx congicus – Congo clawless otter
- Aotus azarae – Azara's night monkey
- Aotus brumbacki – Brumback's night monkey
- Aotus griseimembra – Grey-handed night monkey
- Aotus jorgehernandezi – Hernández-camacho's night monkey
- Aotus lemurinus – Colombian night monkey
- Aotus miconax – Andean night monkey
- Aotus nancymaae – Nancy ma's night monkey
- Aotus nigriceps – Black-headed night monkey
- Aotus trivirgatus – Northern night monkey
- Aotus vociferans – Spix's night monkey
- Aotus zonalis – Panamanian night monkey
- Aplodontia rufa – Mountain beaver
- Apodemus agrarius – Striped field mouse
- Apodemus alpicola – Alpine field mouse
- Apodemus argenteus – Small japanese field mouse
- Apodemus avicennicus
- Apodemus chevrieri – Chevrier's field mouse
- Apodemus draco – South china field mouse
- Apodemus epimelas – Western broad-toothed field mouse
- Apodemus flavicollis – Yellow-necked field mouse
- Apodemus gurkha – Nepalese field mouse
- Apodemus hyrcanicus – Hyrcanian field mouse
- Apodemus ilex
- Apodemus latronum – Large-eared field mouse
- Apodemus microps
- Apodemus mystacinus – Eastern broad-toothed field mouse
- Apodemus pallipes – Himalayan field mouse
- Apodemus peninsulae – Korean field mouse
- Apodemus ponticus – Black sea field mouse
- Apodemus rusiges – Kashmir field mouse
- Apodemus speciosus – Large japanese field mouse
- Apodemus sylvaticus – Long-tailed field mouse
- Apodemus uralensis – Herb field mouse
- Apodemus witherbyi – Steppe field mouse
- Apomys abrae – Luzon cordillera apomys
- Apomys aurorae
- Apomys banahao
- Apomys brownorum
- Apomys camiguinensis – Camiguin forest mouse
- Apomys datae – Northern luzon apomys
- Apomys gracilirostris – Large mindoro apomys
- Apomys hylocetes – Mindanao mossy forest apomys
- Apomys insignis – Mindanao montane forest mouse
- Apomys iridensis
- Apomys littoralis – Mindanao lowland apomys
- Apomys lubangensis
- Apomys magnus
- Apomys microdon – Small luzon apomys
- Apomys minganensis
- Apomys musculus – Least philippine apomys
- Apomys sacobianus – Long-nosed luzon apomys
- Apomys sierrae
- Apomys zambalensis
- Aproteles bulmerae – Bulmer's fruit bat
- Arabitragus jayakari – Arabian tahr
- Arborimus albipes – White-footed vole
- Arborimus longicaudus – Red tree vole
- Arborimus pomo – Sonoma tree vole
- Archaeolemur edwardsi
- Archaeolemur majori
- Archboldomys luzonensis – Isarog shrew mouse
- Archboldomys maximus
- Arctictis binturong – Binturong
- Arctocebus aureus – Golden angwantibo
- Arctocebus calabarensis – Calabar angwantibo
- Arctocephalus australis – South american fur seal
- Arctocephalus forsteri – New zealand fur seal
- Arctocephalus galapagoensis – Galápagos fur seal
- Arctocephalus gazella – Antarctic fur seal
- Arctocephalus philippii – Juan fernández fur seal
- Arctocephalus pusillus – Afro-australian fur seal
- Arctocephalus townsendi – Guadalupe fur seal
- Arctocephalus tropicalis – Subantarctic fur seal
- Arctodus simus
- Arctogalidia stigmatica
- Arctogalidia trivirgata – Small-toothed palm civet
- Arctonyx albogularis
- Arctonyx collaris – Greater hog badger
- Arctonyx hoevenii
- Ardops nichollsi – Tree bat
- Arielulus aureocollaris – Collared sprite
- Arielulus circumdatus – Bronze sprite
- Arielulus cuprosus – Coppery sprite
- Arielulus societatis – Social sprite
- Arielulus torquatus – Necklace sprite
- Ariteus flavescens – Jamaican fig-eating bat
- Artibeus amplus – Large fruit-eating bat
- Artibeus fimbriatus – Fringed fruit-eating bat
- Artibeus fraterculus – Fraternal fruit-eating bat
- Artibeus hirsutus – Hairy fruit-eating bat
- Artibeus inopinatus – Honduran fruit-eating bat
- Artibeus jamaicensis – Jamaican fruit-eating bat
- Artibeus lituratus – Great fruit-eating bat
- Artibeus obscurus – Dark fruit-eating bat
- Artibeus planirostris – Flat-faced fruit-eating bat
- Artibeus schwartzi
- Arvicanthis abyssinicus – Abyssinian grass rat
- Arvicanthis ansorgei – Sudanian arvicanthis
- Arvicanthis blicki – Blick's grass rat
- Arvicanthis nairobae – Nairobi grass rat
- Arvicanthis neumanni – Neumann's arvicanthis
- Arvicanthis niloticus – African grass rat
- Arvicanthis rufinus – Guinean arvicanthis
- Arvicola amphibius – European water vole
- Arvicola italicus
- Arvicola sapidus – Southern water vole
- Arvicola scherman – Montane water vole
- Asellia arabica
- Asellia italosomalica
- Asellia patrizii – Patrizi's trident leaf-nosed bat
- Asellia tridens – Geoffroy's trident leaf-nosed bat
- Aselliscus dongbacana
- Aselliscus stoliczkanus – Stoliczka's asian trident bat
- Aselliscus tricuspidatus – Trident leaf-nosed bat
- Atelerix albiventris – Four-toed hedgehog
- Atelerix algirus – North african hedgehog
- Atelerix frontalis – Southern african hedgehog
- Atelerix sclateri – Somali hedgehog
- Ateles belzebuth – White-bellied spider monkey
- Ateles chamek – Black-faced black spider monkey
- Ateles fusciceps – Brown-headed spider monkey
- Ateles geoffroyi – Geoffroy's spider monkey
- Ateles hybridus – Variegated spider monkey
- Ateles marginatus – White-cheeked spider monkey
- Ateles paniscus – Guiana spider monkey
- Atelocynus microtis – Short-eared dog
- Atherurus africanus – African brush-tailed porcupine
- Atherurus macrourus – Asiatic brush-tailed porcupine
- Atilax paludinosus – Marsh mongoose
- Atlantoxerus getulus – Barbary ground squirrel
- Auliscomys boliviensis – Bolivian big-eared mouse
- Auliscomys pictus – Painted big-eared mouse
- Auliscomys sublimis – Andean big-eared mouse
- Austronomus australis
- Austronomus kuboriensis
- Avahi betsileo – Betsileo woolly lemur
- Avahi cleesei – Bemaraha woolly lemur
- Avahi laniger – Eastern woolly lemur
- Avahi meridionalis – Southern woolly lemur
- Avahi mooreorum – Moore's woolly lemur
- Avahi occidentalis – Lorenz von liburnau's woolly lemur
- Avahi peyrierasi – Peyrieras' woolly lemur
- Avahi ramanantsoavanai – Ramantsoavana's southern woolly lemur
- Avahi unicolor – Sambirano woolly lemur
- Axis axis – Chital
- Axis calamianensis – Calamian deer
- Axis kuhlii – Bawean deer
- Axis porcinus – Hog deer
- Babyrousa babyrussa – Hairy babirusa
- Babyrousa celebensis – Sulawesi babirusa
- Babyrousa togeanensis – Togian islands babirusa
- Baiomys musculus – Southern pygmy mouse
- Baiomys taylori – Northern pygmy mouse
- Baiyankamys habbema – Mountain water rat
- Baiyankamys shawmayeri – Shaw mayer's water rat
- Balaena mysticetus – Bowhead whale
- Balaenoptera acutorostrata – Common minke whale
- Balaenoptera bonaerensis – Antarctic minke whale
- Balaenoptera borealis – Sei whale
- Balaenoptera edeni – Bryde's whale
- Balaenoptera musculus – Blue whale
- Balaenoptera omurai – Omura's whale
- Balaenoptera physalus – Fin whale
- Balantiopteryx infusca – Ecuadorian sac-winged bat
- Balantiopteryx io – Thomas's sac-winged bat
- Balantiopteryx plicata – Gray sac-winged bat
- Balioncyteris maculata – Spotted-winged fruit bat
- Bandicota bengalensis – Lesser bandicoot rat
- Bandicota indica – Greater bandicoot rat
- Bandicota savilei – Savile's bandicoot rat
- Barbastella barbastellus – Western barbastelle
- Barbastella beijingensis
- Barbastella caspica
- Barbastella darjelingensis
- Barbastella leucomelas – Eastern barbastelle
- Bassaricyon alleni – Eastern lowland olingo
- Bassaricyon gabbii – Northern olingo
- Bassaricyon medius – Western lowland olingo
- Bassaricyon neblina – Olinguito
- Bassariscus astutus – Ringtail
- Bassariscus sumichrasti – Cacomistle
- Bathyergus janetta – Namaqua dune mole rat
- Bathyergus suillus – Cape dune mole rat
- Batomys dentatus – Large-toothed batomys
- Batomys granti – Luzon batomys
- Batomys hamiguitan
- Batomys russatus – Russet batomys
- Batomys salomonseni – Mindanao batomys
- Batomys uragon
- Bauerus dubiaquercus – Van gelder's bat
- Bdeogale crassicauda – Bushy-tailed mongoose
- Bdeogale jacksoni – Jackson's mongoose
- Bdeogale nigripes – Black-legged mongoose
- Bdeogale omnivora – Sokoke dog mongoose
- Beamys hindei – Long-tailed pouched rat
- Beamys major
- Beatragus hunteri – Hirola
- Belomys pearsonii – Hairy-footed flying squirrel
- Berardius arnuxii – Arnoux's beaked whale
- Berardius bairdii – Baird's beaked whale
- Berylmys berdmorei – Berdmore's berylmys
- Berylmys bowersi – Bower's white-toothed rat
- Berylmys mackenziei – Kenneth's white-toothed rat
- Berylmys manipulus – Manipur white-toothed rat
- Bettongia anhydra
- Bettongia gaimardi – Tasmanian bettong
- Bettongia lesueur – Burrowing bettong
- Bettongia penicillata – Woylie
- Bettongia pusilla – Nullarbor dwarf bettong
- Bettongia tropica – Northern bettong
- Bibimys chacoensis – Chaco crimson-nosed rat
- Bibimys labiosus – Large-lipped crimson-nosed rat
- Bibimys torresi – Torres's crimson-nosed rat
- Biswamoyopterus biswasi – Namdapha flying squirrel
- Biswamoyopterus laoensis
- Blarina brevicauda – Northern short-tailed shrew
- Blarina carolinensis – Southern short-tailed shrew
- Blarina hylophaga – Elliot's short-tailed shrew
- Blarinella griselda – Indochinese short-tailed shrew
- Blarinella quadraticauda – Asiatic short-tailed shrew
- Blarinella wardi – Burmese short-tailed shrew
- Blarinomys breviceps – Brazilian shrew mouse
- Blastocerus dichotomus – Marsh deer
- Boneia bidens
- Boromys offella – Oriente cave rat
- Boromys torrei – Torre's cave rat
- Bison bison – American bison
- Bison bonasus – European bison
- Bos frontalis
- Bos grunniens
- Bos javanicus – Banteng
- Bos mutus – Wild yak
- Bos sauveli – Kouprey
- Bos taurus
- Boselaphus tragocamelus – Nilgai
- Brachiones przewalskii – Przewalski's jird
- Brachylagus idahoensis – Pygmy rabbit
- Brachyphylla cavernarum – Antillean fruit-eating bat
- Brachyphylla nana – Cuban fruit-eating bat
- Brachytarsomys albicauda – White-tailed tree rat
- Brachytarsomys villosa – Hairy-tailed tree rat
- Brachyteles arachnoides – Southern muriqui
- Brachyteles hypoxanthus – Northern muriqui
- Brachyuromys betsileoensis – Betsileo short-tailed rat
- Brachyuromys ramirohitra – Gregarious short-tailed rat
- Bradypus pygmaeus – Pygmy three-toed sloth
- Bradypus torquatus – Maned three-toed sloth
- Bradypus tridactylus – Pale-throated three-toed sloth
- Bradypus variegatus – Brown-throated sloth
- Brassomys albidens
- Brotomys voratus – Hispaniolan edible rat
- Brucepattersonius griserufescens – Gray-bellied akodont
- Brucepattersonius guarani – Guaraní akodont
- Brucepattersonius igniventris – Red-bellied akodont
- Brucepattersonius iheringi – Ihering's hocicudo
- Brucepattersonius misionensis – Misiones akodont
- Brucepattersonius paradisus – Arroyo of paradise akodont
- Brucepattersonius soricinus – Soricine akodont
- Bubalus arnee – Wild water buffalo
- Bubalus bubalis
- Bubalus depressicornis – Lowland anoa
- Bubalus mindorensis – Tamaraw
- Bubalus quarlesi – Mountain anoa
- Budorcas taxicolor – Takin
- Bullimus bagobus – Mindanao bullimus
- Bullimus gamay – Camiguin bullimus
- Bullimus luzonicus – Luzon bullimus
- Bunolagus monticularis – Riverine rabbit
- Bunomys andrewsi – Andrew's bunomys
- Bunomys chrysocomus – Common bunomys
- Bunomys coelestis – Lompobatang bunomys
- Bunomys fratrorum – Northeastern peninsula bunomys
- Bunomys karokophilus
- Bunomys penitus – Montane bunomys
- Bunomys prolatus – Tambusisi bunomys
- Bunomys torajae
- Burramys parvus – Mountain pygmy possum
- Cabassous centralis – Northern naked-tailed armadillo
- Cabassous chacoensis – Chacoan naked-tailed armadillo
- Cabassous tatouay – Greater naked-tailed armadillo
- Cabassous unicinctus – Southern naked-tailed armadillo
- Cabreramops aequatorianus
- Cacajao calvus – Bald-headed uacari
- Cacajao melanocephalus
- Cacajao ouakary
- Caenolestes caniventer – Gray-bellied shrew opossum
- Caenolestes condorensis – Andean caenolestid
- Caenolestes convelatus – Blackish shrew opossum
- Caenolestes fuliginosus – Silky shrew opossum
- Caenolestes sangay
- Calassomys apicalis
- Calcochloris obtusirostris – Yellow golden mole
- Calcochloris tytonis – Somali golden mole
- Callicebus barbarabrownae – Blond titi monkey
- Callicebus coimbrai – Coimbra-filho's titi monkey
- Callicebus melanochir – Coastal black-handed titi
- Callicebus nigrifrons – Black-fronted titi monkey
- Callicebus personatus – Atlantic titi
- Callimico goeldii – Goeldi's monkey
- Callistomys pictus – Painted tree-rat
- Callithrix aurita – Buffy-tufted-ear marmoset
- Callithrix flaviceps – Buffy-headed marmoset
- Callithrix geoffroyi – Geoffroy's tufted-ear marmoset
- Callithrix jacchus – Common marmoset
- Callithrix kuhlii – Wied's marmoset
- Callithrix penicillata – Black-pencilled marmoset
- Callorhinus ursinus – Northern fur seal
- Callosciurus adamsi – Ear-spot squirrel
- Callosciurus baluensis – Kinabalu squirrel
- Callosciurus caniceps – Grey-bellied squirrel
- Callosciurus erythraeus – Pallas's squirrel
- Callosciurus finlaysonii – Variable squirrel
- Callosciurus inornatus – Inornate squirrel
- Callosciurus melanogaster – Mentawai squirrel
- Callosciurus nigrovittatus – Black-striped squirrel
- Callosciurus notatus – Plantain squirrel
- Callosciurus orestes – Borneo black-banded squirrel
- Callosciurus phayrei – Phayre's squirrel
- Callosciurus prevostii – Prevost's squirrel
- Callosciurus pygerythrus – Hoary-bellied squirrel
- Callosciurus quinquestriatus – Anderson's squirrel
- Callospermophilus lateralis – Green river basin golden-mantled ground squirrel
- Callospermophilus madrensis – Sierra madre ground squirrel
- Callospermophilus saturatus – Cascade golden-mantled ground squirrel
- Calomys achaku
- Calomys boliviae – Bolivian vesper mouse
- Calomys callidus – Crafty vesper mouse
- Calomys callosus – Large vesper mouse
- Calomys cerqueirai
- Calomys chinchilico
- Calomys expulsus – Rejected vesper mouse
- Calomys frida
- Calomys hummelincki – Hummelinck's vesper mouse
- Calomys laucha – Small vesper mouse
- Calomys lepidus – Andean vesper mouse
- Calomys mattevii
- Calomys miurus
- Calomys musculinus – Drylands vesper mouse
- Calomys sorellus – Peruvian vesper mouse
- Calomys tener – Delicate vesper mouse
- Calomys tocantinsi – Tocantins vesper mouse
- Calomys venustus – Córdoba laucha
- Calomyscus bailwardi – Mouse-like hamster
- Calomyscus baluchi – Baluchi brush-tailed mouse
- Calomyscus elburzensis – Goodwin's brush-tailed mouse
- Calomyscus grandis – Noble calomyscus
- Calomyscus hotsoni – Hotson's brush-tailed mouse
- Calomyscus mystax – Afghan mouse-like hamster
- Calomyscus tsolovi – Tsolov's mouse-like hamster
- Calomyscus urartensis – Urar calomyscus
- Caloprymnus campestris – Desert rat kangaroo
- Caluromys derbianus – Central american woolly opossum
- Caluromys lanatus – Brown-eared woolly opossum
- Caluromys philander – Bare-tailed woolly opossum
- Caluromysiops irrupta – Black-shouldered opossum
- Calyptophractus retusus – Greater fairy armadillo
- Camelus bactrianus
- Camelus dromedarius
- Canis adustus – Side-striped jackal
- Canis anthus
- Canis aureus – Golden jackal
- Canis latrans – Coyote
- Canis lupus – Gray wolf
- Canis lycaon
- Canis mesomelas – Black-backed jackal
- Canis rufus – Red wolf
- Canis simensis – Ethiopian wolf
- Cannomys badius – Lesser bamboo rat
- Cansumys canus
- Caperea marginata – Pygmy right whale
- Capra aegagrus – Wild goat
- Capra caucasica – Western tur
- Capra cylindricornis – Eastern tur
- Capra falconeri – Markhor
- Capra hircus
- Capra ibex – Alpine ibex
- Capra nubiana – Nubian ibex
- Capra pyrenaica – Iberian wild goat
- Capra sibirica – Siberian ibex
- Capra walie – Walia ibex
- Capreolus capreolus – European roe deer
- Capreolus pygargus – Siberian roe deer
- Capricornis crispus – Japanese serow
- Capricornis milneedwardsii – Chinese serow
- Capricornis rubidus – Red serow
- Capricornis sumatraensis – Sumatran serow
- Capricornis swinhoei – Formosan serow
- Capricornis thar – Himalayan serow
- Caprolagus hispidus – Hispid hare
- Capromys pilorides – Desmarest's hutia
- Caracal aurata – African golden cat
- Caracal caracal – Caracal
- Cardiocranius paradoxus – Five-toed pygmy jerboa
- Cardioderma cor – Heart-nosed bat
- Carlito syrichta
- Carollia benkeithi
- Carollia brevicauda – Silky short-tailed bat
- Carollia castanea – Chestnut short-tailed bat
- Carollia colombiana
- Carollia manu – Manu short-tailed bat
- Carollia monohernandezi
- Carollia perspicillata – Seba's short-tailed bat
- Carollia sowelli – Sowell's short-tailed bat
- Carollia subrufa – Gray short-tailed bat
- Carpitalpa arendsi – Arend's golden mole
- Carpomys melanurus – Large luzon carpomys
- Carpomys phaeurus – Small luzon carpomys
- Carterodon sulcidens – Owl's spiny rat
- Caryomys eva – Eva's red-backed vole
- Caryomys inez – Inez's red-backed vole
- Casinycteris argynnis – Short-palated fruit bat
- Casinycteris campomaanensis
- Casinycteris ophiodon
- Castor canadensis – American beaver
- Castor fiber – Eurasian beaver
- Castoria serrensis
- Catagonus wagneri – Chacoan peccary
- Catopuma badia – Borneo bay cat
- Catopuma temminckii – Asiatic golden cat
- Cavia aperea – Brazilian guinea pig
- Cavia fulgida – Shiny guinea pig
- Cavia intermedia – Santa catarina's guinea pig
- Cavia magna – Greater guinea pig
- Cavia patzelti – Sacha guinea pig
- Cavia porcellus
- Cavia tschudii – Montane guinea pig
- Cebuella pygmaea – Pygmy marmoset
- Cebus aequatorialis
- Cebus albifrons – Humboldt's white-fronted capuchin
- Cebus brunneus
- Cebus capucinus
- Cebus cesarae
- Cebus cuscinus
- Cebus imitator
- Cebus kaapori – Ka'apor capuchin
- Cebus leucocephalus
- Cebus malitiosus
- Cebus olivaceus
- Cebus unicolor
- Cebus versicolor
- Cebus yuracus
- Centronycteris centralis – Thomas's shaggy bat
- Centronycteris maximiliani – Shaggy bat
- Centurio senex – Wrinkle-faced bat
- Cephalopachus bancanus
- Cephalophus adersi – Aders' duiker
- Cephalophus callipygus – Peters' duiker
- Cephalophus dorsalis – Bay duiker
- Cephalophus harveyi – Harvey's duiker
- Cephalophus jentinki – Jentink's duiker
- Cephalophus leucogaster – White-bellied duiker
- Cephalophus natalensis – Natal red duiker
- Cephalophus niger – Black duiker
- Cephalophus nigrifrons – Black-fronted duiker
- Cephalophus ogilbyi – Ogilby's duiker
- Cephalophus rubidus
- Cephalophus rufilatus – Red-flanked duiker
- Cephalophus silvicultor – Yellow-backed duiker
- Cephalophus spadix – Abbott's duiker
- Cephalophus weynsi – Weyns's duiker
- Cephalophus zebra – Zebra duiker
- Cephalorhynchus commersonii – Commerson's dolphin
- Cephalorhynchus eutropia – Chilean dolphin
- Cephalorhynchus heavisidii – Heaviside's dolphin
- Cephalorhynchus hectori – Hector's dolphin
- Ceratotherium simum – White rhinoceros
- Cercartetus caudatus – Long-tailed pygmy possum
- Cercartetus concinnus – Western pygmy possum
- Cercartetus lepidus – Little pygmy possum
- Cercartetus nanus – Eastern pygmy possum
- Cercocebus agilis – Agile mangabey
- Cercocebus atys – Sooty mangabey
- Cercocebus chrysogaster – Golden-bellied mangabey
- Cercocebus galeritus – Tana river mangabey
- Cercocebus lunulatus
- Cercocebus sanjei – Sanje river mangabey
- Cercocebus torquatus – Red-capped mangabey
- Cercopithecus albogularis
- Cercopithecus ascanius – Red-tailed monkey
- Cercopithecus campbelli – Campbell's monkey
- Cercopithecus cephus – Moustached monkey
- Cercopithecus denti
- Cercopithecus diana – Diana monkey
- Cercopithecus doggetti
- Cercopithecus dryas – Dryas monkey
- Cercopithecus erythrogaster – Red-bellied monkey
- Cercopithecus erythrotis – Red-eared monkey
- Cercopithecus hamlyni – Owl-faced monkey
- Cercopithecus kandti
- Cercopithecus lomamiensis
- Cercopithecus lowei
- Cercopithecus mitis – Blue monkey
- Cercopithecus mona – Mona monkey
- Cercopithecus neglectus – De brazza's monkey
- Cercopithecus nictitans – Putty-nosed monkey
- Cercopithecus petaurista – Spot-nosed monkey
- Cercopithecus pogonias
- Cercopithecus roloway
- Cercopithecus sclateri – Sclater's monkey
- Cercopithecus wolfi
- Cerdocyon thous – Crab-eating fox
- Cerradomys akroai
- Cerradomys goytaca
- Cerradomys langguthi
- Cerradomys maracajuensis – Maracaju rice rat
- Cerradomys marinhus – Marinho's rice rat
- Cerradomys scotti – Lindbergh's rice rat
- Cerradomys subflavus – Terraced rice rat
- Cerradomys vivoi
- Cervus albirostris – White-lipped deer
- Rusa alfredi – Phillipine spotted deer
- Cervus canadensis
- Cervus elaphus – Red deer
- Cervus hanglu
- Rusa marianna – Philippine deer
- Cervus nippon – Sika deer
- Rusa timorensis – Javan deer
- Rusa unicolor – Sambar
- Chacodelphys formosa
- Chaerephon aloysiisabaudiae – Duke of abruzzi's wrinkle-lipped bat
- Chaerephon ansorgei – Ansorge's wrinkle-lipped bat
- Chaerephon atsinanana
- Chaerephon bemmeleni – Gland-tailed wrinkle-lipped bat
- Chaerephon bivittatus – Spotted wrinkle-lipped bat
- Chaerephon bregullae – Fijian free-tailed bat
- Chaerephon chapini – Long-crested free-tailed bat
- Chaerephon gallagheri – Gallagher's wrinkle-lipped bat
- Chaerephon jobensis – Greater northern free-tailed bat
- Chaerephon jobimena
- Chaerephon johorensis – Northern free-tailed bat
- Chaerephon leucogaster
- Chaerephon major – Large wrinkle-lipped bat
- Chaerephon nigeriae – Nigerian free-tailed bat
- Chaerephon plicatus – Wrinkle-lipped free-tailed bat
- Chaerephon pumilus – Little free-tailed bat
- Chaerephon pusillus
- Chaerephon russatus – Russet wrinkle-lipped bat
- Chaerephon shortridgei
- Chaerephon solomonis – Solomons free-tailed bat
- Chaerephon tomensis – São tomé free-tailed bat
- Chaeropus ecaudatus – Pig-footed bandicoot
- Chaetocauda sichuanensis – Sichuan dormouse
- Chaetodipus ammophilus
- Chaetodipus arenarius – Little desert pocket mouse
- Chaetodipus artus – Narrow-skulled pocket mouse
- Chaetodipus baileyi – Bailey's pocket mouse
- Chaetodipus californicus – California pocket mouse
- Chaetodipus eremicus – Chihuahuan desert pocket mouse
- Chaetodipus fallax – San diego pocket mouse
- Chaetodipus formosus – Long-tailed pocket mouse
- Chaetodipus goldmani – Goldman's pocket mouse
- Chaetodipus hispidus – Hispid pocket mouse
- Chaetodipus intermedius – Rock pocket mouse
- Chaetodipus lineatus – Lined pocket gopher
- Chaetodipus nelsoni – Nelson's pocket mouse
- Chaetodipus penicillatus – Desert pocket mouse
- Chaetodipus pernix – Sinaloan pocket mouse
- Chaetodipus rudinoris – Baja pocket mouse
- Chaetodipus siccus
- Chaetodipus spinatus – Spiny pocket mouse
- Chaetomys subspinosus – Bristle-spined rat
- Chaetophractus vellerosus – Screaming hairy armadillo
- Chaetophractus villosus – Large hairy armadillo
- Chalinolobus dwyeri – Large-eared pied bat
- Chalinolobus gouldii – Gould's wattled bat
- Chalinolobus morio – Chocolate wattled bat
- Chalinolobus neocaledonicus – New caledonia wattled bat
- Chalinolobus nigrogriseus – Hoary wattled bat
- Chalinolobus picatus – Little pied bat
- Chalinolobus tuberculatus – New zealand long-tailed bat
- Cheirogaleus andysabini
- Cheirogaleus crossleyi – Furry-eared dwarf lemur
- Cheirogaleus lavasoensis
- Cheirogaleus major – Geoffroy's dwarf lemur
- Cheirogaleus medius – Western fat-tailed dwarf lemur
- Cheirogaleus minusculus – Lesser iron-grey dwarf lemur
- Cheirogaleus shethi
- Cheirogaleus sibreei – Sibree's dwarf lemur
- Cheirogaleus thomasi
- Cheiromeles parvidens – Lesser naked bat
- Cheiromeles torquatus – Greater naked bat
- Chelemys megalonyx – Large long-clawed mouse
- Cheracebus lucifer
- Cheracebus lugens
- Cheracebus medemi
- Cheracebus purinus
- Cheracebus regulus
- Cheracebus torquatus
- Chibchanomys orcesi – Las cajas ichthyomyine
- Chibchanomys trichotis – Chibchan water mouse
- Chilomys fumeus
- Chilomys instans – Colombian forest mouse
- Chilonatalus macer
- Chilonatalus micropus – Cuban lesser funnel-eared bat
- Chilonatalus tumidifrons – Bahamian lesser funnel-eared bat
- Chimarrogale himalayica – Himalayan water shrew
- Chimarrogale leander
- Chimarrogale platycephalus – Japanese water shrew
- Chimarrogale styani – Chinese water shrew
- Chimarrogale varennei
- Chinchilla chinchilla – Short-tailed chinchilla
- Chinchilla lanigera – Long-tailed chinchilla
- Chinchillula sahamae – Altiplano chincilla mouse
- Chionomys gud – Caucasian snow vole
- Chionomys nivalis – European snow vole
- Chionomys roberti – Robert's snow vole
- Chiroderma doriae – Brazilian big-eyed bat
- Chiroderma improvisum – Guadeloupean big-eyed bat
- Chiroderma salvini – Salvin's big-eyed bat
- Chiroderma trinitatum – Little big-eyed bat
- Chiroderma villosum – Hairy big-eyed bat
- Chiroderma vizottoi
- Chiromyscus chiropus – Indochinese chiromyscus
- Chiromyscus langbianis
- Chiromyscus thomasi
- Chironax melanocephalus – Black-capped fruit bat
- Chironectes minimus – Water opossum
- Chiropodomys calamianensis – Palawan pencil-tailed tree mouse
- Chiropodomys gliroides – Indomalayan pencil-tailed tree mouse
- Chiropodomys karlkoopmani – Koopman's pencil-tailed tree mouse
- Chiropodomys major – Greater pencil-tailed tree mouse
- Chiropodomys muroides – Gray-bellied pencil-tailed tree mouse
- Chiropodomys pusillus – Lesser pencil-tailed tree mouse
- Chiropotes albinasus – White-nosed saki
- Chiropotes chiropotes – Bearded saki
- Chiropotes sagulatus
- Chiropotes satanas – Black bearded saki
- Chiropotes utahickae – Uta hick's bearded saki
- Chiruromys forbesi – Forbes's tree mouse
- Chiruromys lamia – Broad-headed tree mouse
- Chiruromys vates – Lesser tree mouse
- Chlamyphorus truncatus – Pink fairy armadillo
- Chlorocebus aethiops – Grivet monkey
- Chlorocebus cynosuros – Malbrouck monkey
- Chlorocebus djamdjamensis – Bale monkey
- Chlorocebus pygerythrus – Vervet monkey
- Chlorocebus sabaeus – Green monkey
- Chlorocebus tantalus – Tantalus monkey
- Chlorotalpa duthieae – Duthie's golden mole
- Chlorotalpa sclateri – Sclater's golden mole
- Chodsigoa caovansunga – Van sung's shrew
- Chodsigoa furva
- Chodsigoa hoffmanni
- Chodsigoa hypsibia – De winton's shrew
- Chodsigoa lamula – Lamulate shrew
- Chodsigoa parca – Lowe's shrew
- Chodsigoa parva – Pygmy brown-toothed shrew
- Chodsigoa salenskii – Salenski's shrew
- Chodsigoa smithii – Smith's shrew
- Chodsigoa sodalis – Lesser taiwanese shrew
- Choeroniscus godmani – Godman's long-tailed bat
- Choeroniscus minor – Lesser long-tailed bat
- Choeroniscus periosus – Greater long-tailed bat
- Choeronycteris mexicana – Mexican long-tongued bat
- Choeropsis liberiensis – Pygmy hippopotamus
- Choloepus didactylus – Linné's two-toed sloth
- Choloepus hoffmanni – Hoffmann's two-toed sloth
- Chrotogale owstoni – Owston's civet
- Chrotomys gonzalesi – Isarog chrotomys
- Chrotomys mindorensis – Lowland chrotomys
- Chrotomys sibuyanensis – Sibuyan striped shrew-rat
- Chrotomys silaceus – Blazed luzon chrotomys
- Chrotomys whiteheadi – Montane chrotomys
- Chrotopterus auritus – Woolly false vampire bat
- Chrysochloris asiatica – Cape golden mole
- Chrysochloris stuhlmanni – Stuhlmann's golden mole
- Chrysochloris visagiei – Visagie's golden mole
- Chrysocyon brachyurus – Maned wolf
- Chrysospalax trevelyani – Giant golden mole
- Chrysospalax villosus – Rough-haired golden mole
- Cistugo lesueuri – Lesueur's wing-gland bat
- Cistugo seabrae – Seabra's wing-gland bat
- Civettictis civetta – African civet
- Cloeotis percivali – Percival's trident bat
- Clyomys laticeps – Broad-headed spiny rat
- Coccymys kirrhos
- Coccymys ruemmleri – Rümmler's mouse
- Coccymys shawmayeri
- Coelodonta antiquitatis
- Coelops frithii – Tail-less leaf-nosed bat
- Coelops robinsoni – Malayan tailless leaf-nosed bat
- Coendou baturitensis – Baturite porcupine
- Coendou bicolor – Bicolor-spined porcupine
- Coendou ichillus
- Coendou insidiosus – Bahia hairy dwarf porcupine
- Coendou melanurus
- Coendou mexicanus – Mexican hairy dwarf porcupine
- Coendou nycthemera – Koopman's porcupine
- Coendou prehensilis – Brazilian porcupine
- Coendou pruinosus
- Coendou quichua
- Coendou roosmalenorum – Roosmalen's porcupine
- Coendou rufescens – Stump-tailed porcupine
- Coendou speratus
- Coendou spinosus – Paraguay hairy dwarf porcupine
- Coendou vestitus – Brown hairy dwarf porcupine
- Coleura afra – African sheath-tailed bat
- Coleura kibomalandy
- Coleura seychellensis – Seychelles sheath-tailed bat
- Colobus angolensis – Angolan colobus
- Colobus guereza – Guereza
- Colobus polykomos – King colobus
- Colobus satanas – Black colobus
- Colobus vellerosus – White-thighed colobus
- Colomys goslingi – African wading rat
- Condylura cristata – Star-nosed mole
- Conepatus amazonicus
- Conepatus chinga – Molina's hog-nosed skunk
- Conepatus leuconotus – American hog-nosed skunk
- Conepatus semistriatus – Striped hog-nosed skunk
- Congosorex phillipsorum – Phillips' congo shrew
- Congosorex polli – Greater congo shrew
- Congosorex verheyeni – Lesser congo shrew
- Conilurus albipes – White-footed rabbit-rat
- Conilurus capricornensis
- Conilurus penicillatus – Brush-tailed rabbit-rat
- Connochaetes gnou – Black wildebeest
- Connochaetes taurinus – Common wildebeest
- Cormura brevirostris – Chestnut sac-winged bat
- Corynorhinus mexicanus – Mexican big-eared bat
- Corynorhinus rafinesquii – Rafinesque's big-eared bat
- Corynorhinus townsendii – Townsend's big-eared bat
- Coryphomys buehleri – Buhler's coryphomys
- Coryphomys musseri
- Craseomys andersoni
- Craseomys imaizumii
- Craseomys regulus
- Craseomys rex
- Craseomys rufocanus
- Craseomys shanseius
- Craseomys smithii
- Craseonycteris thonglongyai – Hog-nosed bat
- Crateromys australis – Dinagat bushy-tailed cloud rat
- Crateromys heaneyi – Panay crateromys
- Crateromys paulus – Ilin crateromys
- Crateromys schadenbergi – Luzon crateromys
- Cratogeomys castanops – Yellow-faced pocket gopher
- Cratogeomys fulvescens – Oriental basin pocket gopher
- Cratogeomys fumosus – Smoky pocket gopher
- Cratogeomys goldmani
- Cratogeomys merriami – Merriam's pocket gopher
- Cratogeomys perotensis – Cofre de perote pocket gopher
- Cratogeomys planiceps – Volcán de toluca pocket gopher
- Cremnomys cutchicus – Cutch rock-rat
- Cremnomys elvira – Large rock-rat
- Cricetomys ansorgei
- Cricetomys emini – Forest giant pouched rat
- Cricetomys gambianus – Northern giant pouched rat
- Cricetomys kivuensis
- Cricetulus alticola – Tibetan dwarf hamster
- Cricetulus barabensis – Striped dwarf hamster
- Cricetulus griseus
- Cricetulus kamensis – Kam dwarf hamster
- Cricetulus lama – Lama dwarf hamster
- Cricetulus longicaudatus – Long-tailed dwarf hamster
- Cricetulus migratorius – Gray dwarf hamster
- Cricetulus pseudogriseus
- Cricetulus sokolovi – Sokolov's dwarf hamster
- Cricetulus tibetanus – Tibetan dwarf hamster
- Cricetus cricetus – Black-bellied hamster
- Crocidura abscondita
- Crocidura afeworkbekelei
- Crocidura aleksandrisi – Alexandrian shrew
- Crocidura allex – East african highland shrew
- Crocidura andamanensis – Andaman white-toothed shrew
- Crocidura annamitensis
- Crocidura ansellorum – Ansell's shrew
- Crocidura arabica – Arabian shrew
- Crocidura arispa – Jackass shrew
- Crocidura armenica – Armenian shrew
- Crocidura attenuata – Grey shrew
- Crocidura attila – Hun shrew
- Crocidura baileyi – Bailey's shrew
- Crocidura baluensis – Kinabalu shrew
- Crocidura batakorum
- Crocidura batesi – Bate's shrew
- Crocidura beatus – Mindanao shrew
- Crocidura beccarii – Beccari's shrew
- Crocidura bottegi – Bottego's shrew
- Crocidura bottegoides – Bale shrew
- Crocidura brunnea – Thick-tailed shrew
- Crocidura buettikoferi – Buettikofer's shrew
- Crocidura caliginea – African foggy shrew
- Crocidura canariensis – Canarian shrew
- Crocidura caspica – Caspian shrew
- Crocidura cinderella – Cinderella shrew
- Crocidura congobelgica – Congo white-toothed shrew
- Crocidura cranbrooki
- Crocidura crenata – Long-footed shrew
- Crocidura crossei – Crosse's shrew
- Crocidura cyanea – Reddish-gray musk shrew
- Crocidura denti – Dent's shrew
- Crocidura desperata – Desperate shrew
- Crocidura dhofarensis – Dhofarian shrew
- Crocidura dolichura – Long-tailed musk shrew
- Crocidura douceti – Doucet's musk shrew
- Crocidura dsinezumi – Dsinezumi shrew
- Crocidura eisentrauti – Eisentraut's shrew
- Crocidura elgonius – Elgon shrew
- Crocidura elongata – Elongated shrew
- Crocidura erica – Heather shrew
- Crocidura fingui
- Crocidura fischeri – Fischer's shrew
- Crocidura flavescens – Greater red musk shrew
- Crocidura floweri – Flower's shrew
- Crocidura foetida – Bornean shrew
- Crocidura foxi – Fox's shrew
- Crocidura fuliginosa – Southeast asian shrew
- Crocidura fulvastra – Savanna shrew
- Crocidura fumosa – Smoky white-toothed shrew
- Crocidura fuscomurina – Bicolored musk shrew
- Crocidura gathornei
- Crocidura glassi – Glass's shrew
- Crocidura gmelini
- Crocidura goliath – Goliath shrew
- Crocidura gracilipes – Peters' musk shrew
- Crocidura grandiceps – Large-headed forest shrew
- Crocidura grandis – Greater mindanao shrew
- Crocidura grassei – Grasse's shrew
- Crocidura grayi – Luzon shrew
- Crocidura greenwoodi – Greenwood's shrew
- Crocidura guy
- Crocidura harenna – Harenna shrew
- Crocidura hikmiya
- Crocidura hildegardeae – Hildegarde's shrew
- Crocidura hilliana – Hill's shrew
- Crocidura hirta – Lesser red musk shrew
- Crocidura hispida – Andaman spiny shrew
- Crocidura horsfieldii – Horsefield's shrew
- Crocidura hutanis – Hutan shrew
- Crocidura indochinensis – Indochinese shrew
- Crocidura jacksoni – Jackson's shrew
- Crocidura jenkinsi – Jenkin's shrew
- Crocidura jouvenetae
- Crocidura katinka
- Crocidura kegoensis
- Crocidura kivuana – Kivu shrew
- Crocidura lamottei – Lamotte's shrew
- Crocidura lanosa – Lemara shrew
- Crocidura lasiura – Ussuri shrew
- Crocidura latona – Latona's shrew
- Crocidura lea – Sulawesi shrew
- Crocidura lepidura – Sumatran giant shrew
- Crocidura leucodon – Bicolored shrew
- Crocidura levicula – Sulawesi tiny shrew
- Crocidura littoralis – Butiaba naked-tailed shrew
- Crocidura longipes – Savanna swamp shrew
- Crocidura lucina – Lucina's shrew
- Crocidura ludia – Dramatic shrew
- Crocidura luna – Greater gray-brown musk shrew
- Crocidura lusitania – Mauritanian shrew
- Crocidura lwiroensis
- Crocidura macarthuri – Macarthur's shrew
- Crocidura macmillani – Macmillan's shrew
- Crocidura macowi – Macow's shrew
- Crocidura malayana – Malayan shrew
- Crocidura manengubae – Manenguba shrew
- Crocidura maquassiensis – Maquassie musk shrew
- Crocidura mariquensis – Swamp musk shrew
- Crocidura maurisca – Gracile naked-tailed shrew
- Crocidura maxi – Javanese shrew
- Crocidura mdumai
- Crocidura mindorus – Mindoro shrew
- Crocidura minuta
- Crocidura miya – Sri lankan long-tailed shrew
- Crocidura monax – Kilimanjaro shrew
- Crocidura monticola – Sunda shrew
- Crocidura montis – Montane white-toothed shrew
- Crocidura munissii
- Crocidura muricauda – West african long-tailed shrew
- Crocidura musseri – Mossy forest shrew
- Crocidura mutesae – Ugandan musk shrew
- Crocidura nana – Dwarf white-toothed shrew
- Crocidura nanilla – Tiny white-toothed shrew
- Crocidura neglecta
- Crocidura negligens – Peninsular shrew
- Crocidura negrina – Negros shrew
- Crocidura newmarki
- Crocidura nicobarica – Nicobar shrew
- Crocidura nigeriae – Nigerian shrew
- Crocidura nigricans – Blackish white-toothed shrew
- Crocidura nigripes – Black-footed shrew
- Crocidura nigrofusca – African black shrew
- Crocidura nimbae – Nimba shrew
- Crocidura nimbasilvanus
- Crocidura ninoyi
- Crocidura niobe – Niobe's shrew
- Crocidura obscurior – Obscure white-toothed shrew
- Crocidura olivieri – Olivier's shrew
- Crocidura orientalis – Oriental shrew
- Crocidura orii – Ryukyu shrew
- Crocidura pachyura – North african white-toothed shrew
- Crocidura palawanensis – Palawan shrew
- Crocidura panayensis
- Crocidura paradoxura – Sumatran long-tailed shrew
- Crocidura parvipes – Small-footed shrew
- Crocidura pasha – Pasha shrew
- Crocidura pergrisea – Pale grey shrew
- Crocidura phaeura – Guramba shrew
- Crocidura phanluongi
- Crocidura phuquocensis
- Crocidura picea – Cameroonian shrew
- Crocidura pitmani – Pitman's shrew
- Crocidura planiceps – Flat-headed shrew
- Crocidura poensis – Fraser's musk shrew
- Crocidura polia – Fuscous shrew
- Crocidura pullata – Kashmir white-toothed shrew
- Crocidura raineyi – Rainey shrew
- Crocidura ramona – Negev shrew
- Crocidura rapax – Chinese white-toothed shrew
- Crocidura religiosa – Egyptian pygmy shrew
- Crocidura rhoditis – Sulawesi white-handed shrew
- Crocidura roosevelti – Roosvelt's shrew
- Crocidura russula – White-toothed shrew
- Crocidura sapaensis
- Crocidura selina – Moon shrew
- Crocidura serezkyensis – Serezkaya shrew
- Crocidura shantungensis – Asian lesser white-toothed shrew
- Crocidura sibirica – Siberian shrew
- Crocidura sicula – Sicilian shrew
- Crocidura silacea – Lesser gray-brown musk shrew
- Crocidura smithii – Desert musk shrew
- Crocidura sokolovi
- Crocidura somalica – Somali shrew
- Crocidura stenocephala – Narrow-headed shrew
- Crocidura suaveolens – Lesser shrew
- Crocidura susiana – Iranian shrew
- Crocidura tanakae – Taiwanese gray shrew
- Crocidura tansaniana – Tanzanian shrew
- Crocidura tarella – Ugandan shrew
- Crocidura tarfayensis – Tarfaya shrew
- Crocidura telfordi – Telford's shrew
- Crocidura tenuis – Timor shrew
- Crocidura thalia – Thalia's shrew
- Crocidura theresae – Therese's shrew
- Crocidura thomensis – São tomé shrew
- Crocidura trichura – Christmas island shrew
- Crocidura turba – Tumultuous shrew
- Crocidura ultima – Ultimate shrew
- Crocidura umbra
- Crocidura usambarae – Usambara shrew
- Crocidura viaria – Savanna path shrew
- Crocidura virgata
- Crocidura voi – Voi shrew
- Crocidura vorax – Voracious shrew
- Crocidura vosmaeri – Banka shrew
- Crocidura watasei – Lesser ryukyu shrew
- Crocidura whitakeri – Whitaker's shrew
- Crocidura wimmeri – Wimmer's shrew
- Crocidura wuchihensis – Hainan island shrew
- Crocidura xantippe – Vermiculate shrew
- Crocidura yaldeni
- Crocidura yankariensis – Yankari shrew
- Crocidura zaitsevi – Mikhail zaitsev's shrew
- Crocidura zaphiri – Zaphir's shrew
- Crocidura zarudnyi – Zarudny's shrew
- Crocidura zimmeri – Zimmer's shrew
- Crocidura zimmermanni – Cretan white-toothed shrew
- Crocuta crocuta – Spotted hyaena
- Crossarchus alexandri – Alexander's cusimanse
- Crossarchus ansorgei – Ansorge's cusimanse
- Crossarchus obscurus – Common cusimanse
- Crossarchus platycephalus – Flat-headed cusimanse
- Crossogale hantu – Malayan water shrew
- Crossogale phaeura – Bornean water shrew
- Crossogale sumatrana – Sumatran water shrew
- Crossomys moncktoni – Earless water rat
- Crunomys celebensis – Sulawesi shrew mouse
- Crunomys fallax – Luzon shrew mouse
- Crunomys melanius – Mindanao shrew mouse
- Crunomys suncoides – Katanglad shrew mouse
- Cryptochloris wintoni – De winton's golden mole
- Cryptochloris zyli – Van zyl's golden mole
- Cryptomys hottentotus – African mole rat
- Cryptonanus agricolai – Agricola's gracile opossum
- Cryptonanus chacoensis – Chacoan mouse opossum
- Cryptonanus guahybae
- Cryptonanus ignitus – Red-bellied gracile mouse opossum
- Cryptonanus unduaviensis
- Cryptoprocta ferox – Fossa
- Cryptoprocta spelea – Giant fosa
- Cryptotis alticola – Central mexican broad-clawed shrew
- Cryptotis aroensis
- Cryptotis berlandieri
- Cryptotis brachyonyx – Eastern cordillera small-footed shrew
- Cryptotis cavatorculus
- Cryptotis celaque
- Cryptotis colombiana – Colombian small-eared shrew
- Cryptotis dinirensis
- Cryptotis endersi – Enders's small-eared shrew
- Cryptotis equatoris – Ecuadorean small-eared shrew
- Cryptotis floridana
- Cryptotis goldmani – Goldman's broad-clawed shrew
- Cryptotis goodwini – Goodwin's broad-clawed shrew
- Cryptotis gracilis – Talamancan small eared shrew
- Cryptotis griseoventris – Guatamalan small eared shrew
- Cryptotis hondurensis – Honduran small eared shrew
- Cryptotis lacandonensis
- Cryptotis lacertosus
- Cryptotis magna – Big mexican small-eared shrew
- Cryptotis magnimanus
- Cryptotis mam
- Cryptotis mayensis – Yucatan small-eared shrew
- Cryptotis mccarthyi
- Cryptotis medellinia – Medellín small-eared shrew
- Cryptotis mera – Darien small eared shrew
- Cryptotis meridensis – Merida small-eared shrew
- Cryptotis merriami – Merriam's small-eared shrew
- Cryptotis mexicana – Mexican small-eared shrew
- Cryptotis monteverdensis
- Cryptotis montivaga – Ecuadorean small-eared shrew
- Cryptotis nelsoni – Nelson's small eared shrew
- Cryptotis niausa
- Cryptotis nigrescens – Blackish small-eared shrew
- Cryptotis obscura – Grizzled mexican small-eared shrew
- Cryptotis oreoryctes
- Cryptotis orophila – Central american least shrew
- Cryptotis osgoodi
- Cryptotis parva – North american least shrew
- Cryptotis peregrina – Oaxacan broad-clawed shrew
- Cryptotis perijensis
- Cryptotis peruviensis – Peruvian small-eared shrew
- Cryptotis phillipsii – Phillip's small-eared shrew
- Cryptotis pueblensis
- Cryptotis soricina
- Cryptotis squamipes – Western colombian small-eared shrew
- Cryptotis tamensis – Tamá small-eared shrew
- Cryptotis thomasi – Thomas's small-eared shrew
- Cryptotis tropicalis – Tropical small-eared shrew
- Cryptotis venezuelensis
- Ctenodactylus gundi – North african gundi
- Ctenodactylus vali – Val's gundi
- Ctenomys andersoni
- Ctenomys argentinus – Argentine tuco-tuco
- Ctenomys australis – Southern tuco-tuco
- Ctenomys azarae – Azara's tuco-tuco
- Ctenomys bergi
- Ctenomys bicolor
- Ctenomys boliviensis – Bolivian tuco-tuco
- Ctenomys bonettoi – Bonetto's tuco-tuco
- Ctenomys brasiliensis – Brazilian tuco-tuco
- Ctenomys colburni – Colburn's tuco-tuco
- Ctenomys coludo
- Ctenomys conoveri – Conover's tuco-tuco
- Ctenomys coyhaiquensis
- Ctenomys dorbignyi
- Ctenomys dorsalis – Chacoan tuco-tuco
- Ctenomys emilianus – Emily's tuco-tuco
- Ctenomys erikacuellarae
- Ctenomys famosus
- Ctenomys flamarioni – Tuco-tuco of the dunes
- Ctenomys fochi
- Ctenomys fodax
- Ctenomys frater – Forest tuco-tuco
- Ctenomys fulvus – Tawny tuco-tuco
- Ctenomys goodfellowi
- Ctenomys haigi – Haig's tuco-tuco
- Ctenomys ibicuiensis
- Ctenomys johannis
- Ctenomys juris
- Ctenomys knighti – Catamarca tuco-tuco
- Ctenomys lami
- Ctenomys latro – Mottled tuco-tuco
- Ctenomys lessai
- Ctenomys leucodon – White-toothed tuco-tuco
- Ctenomys lewisi – Lewis's tuco-tuco
- Ctenomys magellanicus – Magellanic tuco-tuco
- Ctenomys mariafarelli
- Ctenomys maulinus – Maule tuco-tuco
- Ctenomys mendocinus – Mendoza tuco-tuco
- Ctenomys minutus – Tiny tuco-tuco
- Ctenomys nattereri
- Ctenomys occultus – Furtive tuco-tuco
- Ctenomys opimus – Highland tuco-tuco
- Ctenomys osvaldoreigi
- Ctenomys paraguayensis
- Ctenomys pearsoni – Pearson's tuco-tuco
- Ctenomys perrensi – Goya tuco-tuco
- Ctenomys peruanus – Peruvian tuco-tuco
- Ctenomys pilarensis – Pilar tuco-tuco
- Ctenomys pontifex – San luis tuco-tuco
- Ctenomys porteousi – Porteous's tuco-tuco
- Ctenomys pundti
- Ctenomys rionegrensis
- Ctenomys roigi
- Ctenomys rondoni
- Ctenomys rosendopascuali
- Ctenomys saltarius – Salta tuco-tuco
- Ctenomys scagliai
- Ctenomys sericeus – Silky tuco-tuco
- Ctenomys sociabilis – Social tuco-tuco
- Ctenomys steinbachi – Steinbach's tuco-tuco
- Ctenomys talarum – Talas tuco-tuco
- Ctenomys torquatus – Collared tuco-tuco
- Ctenomys tuconax – Robust tuco-tuco
- Ctenomys tucumanus – Tucuman tuco-tuco
- Ctenomys tulduco
- Ctenomys validus – Strong tuco-tuco
- Ctenomys viperinus – Vipos tuco-tuco
- Ctenomys yatesi
- Ctenomys yolandae – Yolanda's tuco-tuco
- Cuniculus paca – Spotted paca
- Cuniculus taczanowskii – Mountain paca
- Cuon alpinus – Dhole
- Cuscomys ashaninka – Ashaninika arboreal chinchilla rat
- Cuscomys oblativus
- Cyclopes didactylus – Silky anteater
- Cynictis penicillata – Yellow mongoose
- Cynocephalus volans – Philippine flying lemur
- Cynogale bennettii – Otter civet
- Cynomops abrasus – Cinnamon dog-faced bat
- Cynomops greenhalli – Greenhall's dog-faced bat
- Cynomops mastivus
- Cynomops mexicanus – Mexican dog-faced bat
- Cynomops milleri
- Cynomops planirostris – Southern dog-faced bat
- Cynomys gunnisoni – Gunnison's prairie dog
- Cynomys leucurus – White-tailed prairie dog
- Cynomys ludovicianus – Arizona black-tailed prairie dog
- Cynomys mexicanus – Mexican prairie marmot
- Cynomys parvidens – Utah prairie dog
- Cynopterus brachyotis – Lesser dog-faced fruit bat
- Cynopterus horsfieldii – Horsfield's fruit bat
- Cynopterus luzoniensis – Peters's fruit bat
- Cynopterus minutus – Minute fruit bat
- Cynopterus nusatenggara – Nusatenggara short-nosed fruit bat
- Cynopterus sphinx – Greater shortnosed fruit bat
- Cynopterus titthaecheilus – Indonesian short-nosed fruit bat
- Cystophora cristata – Hooded seal
- Cyttarops alecto – Short-eared bat
- Dacnomys millardi – Millard's rat
- Dactylomys boliviensis – Bolivian bamboo rat
- Dactylomys dactylinus – Amazon bamboo rat
- Dactylomys peruanus – Peruvian bamboo rat
- Dactylopsila kambuayai
- Dactylopsila megalura – Great-tailed triok
- Dactylopsila palpator
- Dactylopsila tatei – Tate's triok
- Dactylopsila trivirgata – Striped possum
- Dama dama – Persian fallow deer
- Dama mesopotamica – Persian fallow deer
- Damaliscus lunatus – Topi
- Damaliscus pygargus – Blesbok
- Dasycercus blythi – Brush-tailed mulgara
- Dasycercus cristicauda – Crest-tailed mulgara
- Dasykaluta rosamondae – Kaluta
- Dasymys alleni
- Dasymys cabrali
- Dasymys capensis
- Dasymys foxi – Fox's shaggy rat
- Dasymys griseifrons
- Dasymys incomtus – African marsh rat
- Dasymys longipilosus
- Dasymys medius
- Dasymys montanus – Montane shaggy rat
- Dasymys nudipes – Angolan shaggy rat
- Dasymys robertsi
- Dasymys rufulus – West african shaggy rat
- Dasymys rwandae
- Dasymys sua
- Dasyprocta azarae – Azara's agouti
- Dasyprocta coibae – Coiban agouti
- Dasyprocta croconota
- Dasyprocta fuliginosa – Black agouti
- Dasyprocta guamara – Orinoco agouti
- Dasyprocta iacki
- Dasyprocta kalinowskii – Kalinowski agouti
- Dasyprocta leporina – Red-rumped agouti
- Dasyprocta mexicana – Mexican agouti
- Dasyprocta prymnolopha – Black-rumped agouti
- Dasyprocta punctata – Central american agouti
- Dasyprocta ruatanica – Ruatan island agouti
- Dasyprocta variegata
- Dasypterus ega
- Dasypterus insularis
- Dasypterus intermedius
- Dasypterus xanthinus
- Dasypus hybridus – Southern long-nosed armadillo
- Dasypus kappleri – Greater long-nosed armadillo
- Dasypus beniensis beniensis
- Dasypus pastasae pastasae
- Dasypus mazzai
- Dasypus novemcinctus – Nine-banded armadillo
- Dasypus pilosus – Hairy long-nosed armadillo
- Dasypus sabanicola – Northern long-nosed armadillo
- Dasypus septemcinctus – Brazilian lesser long-nosed armadillo
- Dasyuroides byrnei – Kowari
- Dasyurus albopunctatus – New guinea quoll
- Dasyurus geoffroii – Western quoll
- Dasyurus hallucatus – Northern quoll
- Dasyurus maculatus – Spotted-tailed quoll
- Dasyurus spartacus – Bronze quoll
- Dasyurus viverrinus – Eastern quoll
- Daubentonia madagascariensis – Aye-aye
- Delanymys brooksi – Delany's swamp mouse
- Delomys altimontanus
- Delomys dorsalis – Striped atlantic forest rat
- Delomys sublineatus – Pallid atlantic forest rat
- Delphinapterus leucas – Beluga
- Delphinus capensis – Long-beaked common dolphin
- Delphinus delphis – Short-beaked common dolphin
- Deltamys kempi – Kemp's grass mouse
- Dendrogale melanura – Bornean smooth-tailed treeshrew
- Dendrogale murina – Northern smooth-tailed treeshrew
- Dendrohyrax arboreus – Southern tree hyrax
- Dendrohyrax dorsalis – Western tree hyrax
- Dendrohyrax validus – Eastern tree hyrax
- Dendrolagus bennettianus – Bennett's tree kangaroo
- Dendrolagus dorianus – Doria's tree kangaroo
- Dendrolagus goodfellowi – Goodfellow's tree kangaroo
- Dendrolagus inustus – Grizzled tree kangaroo
- Dendrolagus lumholtzi – Lumholtz's tree kangaroo
- Dendrolagus matschiei – Huon tree kangaroo
- Dendrolagus mayri – Wondiwoi tree-kangaroo
- Dendrolagus mbaiso – Dingiso
- Dendrolagus notatus
- Dendrolagus pulcherrimus – Golden-mantled tree kangaroo
- Dendrolagus scottae – Tenkile
- Dendrolagus spadix – Lowlands tree kangaroo
- Dendrolagus stellarum – Seri's tree kangaroo
- Dendrolagus ursinus – Vogelkop tree kangaroo
- Dendromus insignis – Montane african climbing mouse
- Dendromus kahuziensis – Mt. kahuzi climbing mouse
- Dendromus lachaisei – Lachaise's climbing mouse
- Dendromus leucostomus
- Dendromus lovati – Lovat's african climbing mouse
- Dendromus melanotis – Gray african climbing mouse
- Dendromus mesomelas – Brant's climbing mouse
- Dendromus messorius – Banana climbing mouse
- Dendromus mystacalis – Chestnut climbing mouse
- Dendromus nyasae
- Dendromus nyikae – Nyika climbing mouse
- Dendromus oreas – Cameroon climbing mouse
- Dendromus ruppi
- Dendromus vernayi – Vernay's climbing mouse
- Dendroprionomys rousseloti – Velvet african climbing mouse
- Deomys ferrugineus – Congo forest mouse
- Dephomys defua – Defua rat
- Dephomys eburneae
- Dermanura anderseni – Andersen's fruit-eating bat
- Dermanura azteca
- Dermanura bogotensis
- Dermanura cinerea
- Dermanura glauca
- Dermanura gnoma
- Dermanura incomitatus
- Dermanura phaeotis – Pygmy fruit-eating bat
- Dermanura rava
- Dermanura rosenbergii
- Dermanura tolteca
- Dermanura watsoni – Thomas's fruit-eating bat
- Desmalopex leucopterus
- Desmalopex microleucopterus
- Desmana moschata – Russian desman
- Desmodilliscus braueri – Pouched gerbil
- Desmodillus auricularis – Cape short-eared gerbil
- Desmodus draculae
- Desmodus rotundus – Common vampire bat
- Desmomys harringtoni – Harrington's rat
- Desmomys yaldeni – Yalden's desmomys
- Diaemus youngi – White-winged vampire bat
- Dicerorhinus sumatrensis – Sumatran rhinoceros
- Diceros bicornis – Black rhinoceros
- Diclidurus albus – Northern ghost bat
- Diclidurus ingens – Greater ghost bat
- Diclidurus isabellus
- Diclidurus scutatus – Lesser ghost bat
- Dicrostonyx groenlandicus – Northern collared lemming
- Dicrostonyx hudsonius – Ungava collared lemming
- Dicrostonyx nelsoni – Nelson's collared lemming
- Dicrostonyx nunatakensis – Ogilvie mountains collared lemming
- Dicrostonyx richardsoni – Richardson's collared lemming
- Dicrostonyx torquatus – Palearctic collared lemming
- Dicrostonyx unalascensis – Umnak island collared lemming
- Dicrostonyx vinogradovi – Wrangel island collared lemming
- Didelphis albiventris – White-eared opossum
- Didelphis aurita – Brazilian common opossum
- Didelphis imperfecta – Guianan white-eared opossum
- Didelphis marsupialis – Common opossum
- Didelphis pernigra – Andean white-eared opossum
- Didelphis virginiana – Virginia opossum
- Dinaromys bogdanovi – Martino's snow vole
- Dinomys branickii – Pacarana
- Diomys crumpi – Crump's mouse
- Diphylla ecaudata – Hairy-legged vampire bat
- Diplogale hosei – Hose's civet
- Diplomesodon pulchellum – Piebald shrew
- Diplomys caniceps – Arboreal soft-furred spiny rat
- Diplomys labilis – Rufous tree rat
- Diplothrix legata – Ryukyus islands tree rat
- Dipodomys agilis – Agile kangaroo rat
- Dipodomys californicus – California kangaroo rat
- Dipodomys compactus – Gulf coast kangaroo rat
- Dipodomys deserti – Desert kangaroo rat
- Dipodomys elator – Texas kangaroo rat
- Dipodomys gravipes – San quintin kangaroo rat
- Dipodomys heermanni – Heermann's kangaroo rat
- Dipodomys ingens – Giant kangaroo rat
- Dipodomys merriami – Merriam's kangaroo rat
- Dipodomys microps – Houserock chisel-toothed kangaroo rat
- Dipodomys nelsoni – Nelson's kangaroo rat
- Dipodomys nitratoides – San joaquin kangaroo rat
- Dipodomys ordii – Ord's kangaroo rat
- Dipodomys ornatus
- Dipodomys panamintinus – Panamint kangaroo rat
- Dipodomys phillipsii – Phillip's kangaroo rat
- Dipodomys simulans – Dulzura kangaroo rat
- Dipodomys spectabilis – Banner-tailed kangaroo rat
- Dipodomys stephensi – Stephens' kangaroo rat
- Dipodomys venustus – Narrow-faced kangaroo rat
- Dipus sagitta – Northern three-toed jerboa
- Distoechurus pennatus – Feather-tailed possum
- Dobsonia anderseni – Andersen's bare-backed fruit bat
- Dobsonia beauforti – Beaufort's bare-backed fruit bat
- Dobsonia chapmani – Philippine bare-backed fruit bat
- Dobsonia crenulata – Halmahera naked-backed fruit bat
- Dobsonia emersa – Biak bare-backed fruit bat
- Dobsonia exoleta – Sulawesi naked-backed fruit bat
- Dobsonia inermis – Solomons bare-backed fruit bat
- Dobsonia minor – Lesser bare-backed fruit bat
- Dobsonia moluccensis – Moluccan naked-backed fruit bat
- Dobsonia pannietensis – Panaeati bare-backed fruit bat
- Dobsonia peronii – Western naked-backed fruit bat
- Dobsonia praedatrix – Bismarck bare-backed fruit bat
- Dobsonia viridis – Greenish naked-backed fruit bat
- Dolichotis patagonum – Mara o liebre patagónica
- Dolichotis salinicola – Conejo del palo
- Dologale dybowskii – Pousargues's mongoose
- Dorcatragus megalotis – Beira
- Dorcopsis atrata – Black dorcopsis
- Dorcopsis hageni – White-striped dorcopsis
- Dorcopsis luctuosa – Grey dorcopsis
- Dorcopsis muelleri – Brown dorcopsis
- Dorcopsulus macleayi – Macleay's dorcopsis
- Dorcopsulus vanheurni – Small dorcopsis
- Doryrhina cyclops – Cyclops roundleaf bat
- Dremomys gularis – Red-throated squirrel
- Dremomys lokriah – Orange-bellied himalayan squirrel
- Dremomys pernyi – Perny's long-nosed squirrel
- Dremomys pyrrhomerus – Red-hipped squirrel
- Dremomys rufigenis – Red-cheeked squirrel
- Dromiciops bozinovici
- Dromiciops gliroides – Monito del monte
- Dromiciops mondaca
- Dryadonycteris capixaba
- Drymoreomys albimaculatus
- Dryomys laniger – Woolly dormouse
- Dryomys niethammeri – Baluchistan forest dormouse
- Dryomys nitedula – Forest dormouse
- Dugong dugon – Dugong
- Dusicyon australis – Falklands wolf
- Dusicyon avus
- Dyacopterus brooksi – Brooks's dyak fruit bat
- Dyacopterus rickarti
- Dyacopterus spadiceus – Dayak fruit bat
- Dymecodon pilirostris – True's shrew mole
- Echimys chrysurus – White-faced tree rat
- Echimys saturnus – Dark spiny tree-rat
- Echimys vieirai
- Echinops telfairi – Lesser hedgehog tenrec
- Echinosorex gymnura – Moonrat
- Echiothrix centrosa – Central sulawesi echiothrix
- Echiothrix leucura – Northern sulawesi echiothrix
- Echymipera clara – Clara's echymipera
- Echymipera davidi – David's echymipera
- Echymipera echinista – Menzies' echymipera
- Echymipera kalubu – Common echymipera
- Echymipera rufescens – Long-nosed echymipera
- Ectophylla alba – Honduran white bat
- Eidolon dupreanum – Madagascan fruit bat
- Eidolon helvum – African straw-coloured fruit-bat
- Eira barbara – Tayra
- Elaphodus cephalophus – Tufted deer
- Elaphurus davidianus – Père david's deer
- Elephantulus brachyrhynchus – Short-snouted sengi
- Elephantulus edwardii – Cape rock sengi
- Elephantulus fuscipes – Dusky-footed sengi
- Elephantulus fuscus – Dusky sengi
- Elephantulus intufi – Bushveld sengi
- Elephantulus myurus – Eastern rock sengi
- Elephantulus pilicaudus – Karoo rock sengi
- Elephantulus revoili
- Elephantulus rufescens – Rufous sengi
- Elephantulus rupestris – Western rock sengi
- Elephas maximus – Asian elephant
- Eligmodontia bolsonensis
- Eligmodontia dunaris
- Eligmodontia hirtipes
- Eligmodontia moreni – Monte gerbil mouse
- Eligmodontia morgani – Morgan's gerbil mouse
- Eligmodontia puerulus – Andean gerbil mouse
- Eligmodontia typus – Lowland gerbil mouse
- Eliomys melanurus – Asian garden dormouse
- Eliomys munbyanus
- Eliomys quercinus – Garden dormouse
- Eliurus antsingy – Tsingy tuft-tailed rat
- Eliurus carletoni – Ankarana special reserve tufted-tailed rat
- Eliurus danieli – Daniel's tuft-tailed rat
- Eliurus ellermani – Ellerman's tuft-tailed rat
- Eliurus grandidieri – Grandidier's tuft-tailed rat
- Eliurus majori – Major's tufted-tailed rat
- Eliurus minor – Lesser tufted-tailed rat
- Eliurus myoxinus – Western tuft-tailed rat
- Eliurus penicillatus – White-tipped tuft-tailed rat
- Eliurus petteri – Petter's tuft-tailed rat
- Eliurus tanala – Tanala tuft-tailed rat
- Eliurus webbi – Webb's tuft-tailed rat
- Ellobius alaicus – Alai mole vole
- Ellobius fuscocapillus – Southern mole vole
- Ellobius lutescens – Transcaucasian mole vole
- Ellobius talpinus – Northern mole vole
- Ellobius tancrei – Zaisan mole vole
- Emballonura alecto – Small asian sheath-tailed bat
- Emballonura beccarii – Beccari's sheath-tailed bat
- Emballonura dianae – Large-eared sheath-tailed bat
- Emballonura furax – New guinea sheath-tailed bat
- Emballonura monticola – Lesser sheath-tailed bat
- Emballonura raffrayana – Raffray's sheath-tailed bat
- Emballonura semicaudata – Pacific sheath-tailed bat
- Emballonura serii – Seri's sheath-tailed bat
- Enchisthenes hartii – Velvety fruit-eating bat
- Enhydra lutris – Sea otter
- Eoglaucomys fimbriatus – Small kashmir flying squirrel
- Eolagurus luteus – Yellow steppe lemming
- Eolagurus przewalskii – Przewalski's steppe lemming
- Eonycteris major – Greater dawn bat
- Eonycteris robusta – Philippine dawn bat
- Eonycteris spelaea – Dawn bat
- Eospalax baileyi
- Eospalax cansus
- Eospalax fontanierii – Chinese zokor
- Eospalax rothschildi – Rothschild's zokor
- Eospalax rufescens
- Eospalax smithii – Smith's zokor
- Eothenomys chinensis – Sichuan red-backed vole
- Eothenomys custos – Southwest china red-backed vole
- Eothenomys eleusis
- Eothenomys hintoni
- Eothenomys melanogaster – Père david's vole
- Eothenomys miletus
- Eothenomys olitor – Black-eared red-backed vole
- Eothenomys proditor – Yulongxuen red-backed vole
- Eothenomys tarquinius
- Eothenomys wardi – Ward's red-backed vole
- Eozapus setchuanus – Chinese jumping mouse
- Episoriculus baileyi
- Episoriculus caudatus – Hodgson's brown-toothed shrew
- Episoriculus fumidus – Taiwan brown-toothed shrew
- Episoriculus leucops – Long-tailed brown-toothed shrew
- Episoriculus macrurus – Arboreal brown-toothed shrew
- Episoriculus sacratus
- Epixerus ebii – Western palm squirrel
- Epomophorus angolensis – Angolan epauletted fruit bat
- Epomophorus anselli
- Epomophorus crypturus – Peters's epauletted fruit bat
- Epomophorus dobsonii – Dobson's fruit bat
- Epomophorus gambianus – Gambian epauletted fruit bat
- Epomophorus grandis – Lesser angolan epauletted fruit bat
- Epomophorus labiatus – Ethiopian epauletted fruit bat
- Epomophorus minimus – East african epauletted fruit bat
- Epomophorus minor
- Epomophorus wahlbergi – Wahlberg's epauletted fruit bat
- Epomops buettikoferi – Buettikofer's epauletted fruit bat
- Epomops franqueti – Franquet's epauletted fruit bat
- Eptesicus anatolicus
- Eptesicus andinus – Little black serotine
- Eptesicus bottae – Botta's serotine
- Eptesicus brasiliensis – Brazilian brown bat
- Eptesicus chiriquinus – Chiriquinan serotine
- Eptesicus diminutus – Diminutive serotine
- Eptesicus dimissus – Surat serotine
- Eptesicus floweri – Horn-skinned bat
- Eptesicus furinalis – Argentine brown bat
- Eptesicus fuscus – Big brown bat
- Eptesicus gobiensis – Gobi big brown bat
- Eptesicus guadeloupensis – Guadeloupe big brown bat
- Eptesicus hottentotus – Long-tailed greater serotine bat
- Eptesicus innoxius – Harmless serotine
- Eptesicus isabellinus – Meridional serotine
- Eptesicus japonensis – Japanese short-tailed bat
- Eptesicus kobayashii – Kobayashi's serotine
- Eptesicus lobatus
- Eptesicus lynni
- Eptesicus nilssonii – Northern bat
- Eptesicus ognevi
- Eptesicus pachyomus
- Eptesicus pachyotis – Thick-eared bat
- Eptesicus platyops – Lagos serotine
- Eptesicus serotinus – Serotine
- Eptesicus taddeii
- Eptesicus tatei – Sombre bat
- Equus africanus – African wild ass
- Equus asinus
- Equus caballus
- Equus capensis
- Equus ferus – Przewalski's horse
- Equus grevyi – Grevy's zebra
- Equus hemionus – Asiatic wild ass
- Equus kiang – Kiang
- Equus neogeus
- Equus ovodovi
- Equus quagga – Plains zebra
- Equus zebra – Mountain zebra
- Eremitalpa granti – Grant's golden mole
- Eremodipus lichtensteini – Lichtenstein's jerboa
- Eremoryzomys mesocaudis
- Eremoryzomys polius – Gray rice rat
- Erethizon dorsatum – North american porcupine
- Erignathus barbatus – Bearded seal
- Erinaceus amurensis – Manchurian hedgehog
- Erinaceus concolor – Southern white-breasted hedgehog
- Erinaceus europaeus – Western european hedgehog
- Erinaceus roumanicus – Northern white-breasted hedgehog
- Eropeplus canus – Sulawesi soft-furred rat
- Erophylla bombifrons – Brown flower bat
- Erophylla sezekorni – Buffy flower bat
- Erythrocebus patas – Patas monkey
- Eschrichtius robustus – Gray whale
- Eubalaena australis – Southern right whale
- Eubalaena glacialis – North atlantic right whale
- Eubalaena japonica – North pacific right whale
- Euchoreutes naso – Long-eared jerboa
- Euderma maculatum – Spotted bat
- Eudiscoderma thongareeae
- Eudiscopus denticulus – Disk-footed bat
- Eudorcas albonotata – Mongalla gazelle
- Eudorcas rufifrons – Red-fronted gazelle
- Eudorcas rufina – Red gazelle
- Eudorcas thomsonii – Thomson's gazelle
- Eudorcas tilonura
- Eulemur albifrons – White-fronted lemur
- Eulemur cinereiceps – White-collared lemur
- Eulemur collaris – Collared brown lemur
- Eulemur coronatus – Crowned lemur
- Eulemur flavifrons – Blue-eyed black lemur
- Eulemur fulvus – Brown lemur
- Eulemur macaco – Black lemur
- Eulemur mongoz – Mongoose lemur
- Eulemur rubriventer – Red-bellied lemur
- Eulemur rufifrons – Red-fronted brown lemur
- Eulemur rufus – Red brown lemur
- Eulemur sanfordi – Sanford's brown lemur
- Eumetopias jubatus – Steller sea lion
- Eumops auripendulus – Shaw's mastiff bat
- Eumops bonariensis – Dwarf bonneted bat
- Eumops chimaera
- Eumops chiribaya
- Eumops dabbenei – Dabbene's mastiff bat
- Eumops delticus
- Eumops ferox
- Eumops floridanus – Florida bonneted bat
- Eumops glaucinus – Wagner's bonneted bat
- Eumops hansae – Sanborn's bonneted bat
- Eumops maurus – Guianan bonneted bat
- Eumops nanus
- Eumops patagonicus – Patagonian dwarf bonneted bat
- Eumops perotis – Western mastiff bat
- Eumops trumbulli
- Eumops underwoodi – Underwood's bonneted bat
- Eumops wilsoni
- Euneomys chinchilloides – Patagonian chincilla mouse
- Euneomys fossor – Burrowing euneomys
- Euneomys mordax – Biting chincilla mouse
- Euneomys petersoni – Peterson's chincilla mouse
- Euoticus elegantulus – Southern needle-clawed galago
- Euoticus pallidus – Northern needle-clawed galago
- Eupetaurus cinereus – Woolly flying squirrel
- Euphractus sexcinctus – Yellow armadillo
- Eupleres goudotii – Eastern falanouc
- Eupleres major
- Euroscaptor grandis – Greater chinese mole
- Euroscaptor klossi – Kloss's mole
- Euroscaptor kuznetsovi
- Euroscaptor longirostris – Long-nosed mole
- Euroscaptor malayana
- Euroscaptor micrura – Himalayan mole
- Euroscaptor orlovi
- Euroscaptor parvidens – Small-toothed mole
- Euroscaptor subanura
- Euryoryzomys emmonsae – Emmons's rice rat
- Euryoryzomys lamia – Monster rice rat
- Euryoryzomys legatus – Big-headed rice rat
- Euryoryzomys macconnelli – Macconnell's rice rat
- Euryoryzomys nitidus – Elegant rice rat
- Euryoryzomys russatus – Russet rice rat
- Euryzygomatomys spinosus – Guiara
- Eutamias sibiricus
- Euxerus erythropus
- Exilisciurus concinnus – Philippine pygmy squirrel
- Exilisciurus exilis – Least pygmy squirrel
- Exilisciurus whiteheadi – Tufted pygmy squirrel
- Falsistrellus affinis – Chocolate pipistrelle
- Falsistrellus mackenziei – Western false pipistrelle
- Falsistrellus mordax – Pungent pipistrelle
- Falsistrellus petersi – Peters's pipistrelle
- Falsistrellus tasmaniensis – Eastern false pipistrelle
- Felis bieti – Chinese mountain cat
- Felis catus
- Felis chaus – Jungle cat
- Felis lybicus
- Felis margarita – Sand cat
- Felis nigripes – Black-footed cat
- Felis silvestris – Wild cat
- Felovia vae – Felou gundi
- Feresa attenuata – Pygmy killer whale
- Feroculus feroculus – Kelaart's long-clawed shrew
- Fossa fossana – Spotted fanaloka
- Fukomys amatus
- Fukomys anselli – Zambian mole rat
- Fukomys bocagei – Bocage's mole rat
- Fukomys damarensis – Damara mole rat
- Fukomys darlingi – Mashona mole-rat
- Fukomys foxi – Nigerian mole rat
- Fukomys hanangensis
- Fukomys ilariae
- Fukomys kafuensis
- Fukomys livingstoni
- Fukomys mechowii – Mechow's mole rat
- Fukomys micklemi
- Fukomys ochraceocinereus – Ochre mole rat
- Fukomys vandewoestijneae
- Fukomys whytei
- Fukomys zechi – Ghana mole rat
- Funambulus layardi – Layard's palm squirrel
- Funambulus palmarum – Common palm squirrel
- Funambulus pennantii – Five-striped palm squirrel
- Funambulus sublineatus – Dusky-striped squirrel
- Funambulus tristriatus – Western ghats striped squirrel
- Funisciurus anerythrus – Thomas's rope squirrel
- Funisciurus bayonii – Lunda rope squirrel
- Funisciurus carruthersi – Carruther's mountain squirrel
- Funisciurus congicus – Congo rope squirrel
- Funisciurus duchaillui
- Funisciurus isabella – Lady burton's rope squirrel
- Funisciurus lemniscatus – Ribboned rope squirrel
- Funisciurus leucogenys – Orange headed tree squirrel
- Funisciurus pyrropus – Fire-footed rope squirrel
- Funisciurus substriatus – Kintampo rope squirrel
- Furipterus horrens – Thumbless bat
- Galago gallarum – Somali lesser galago
- Galago matschiei – Spectacled lesser galago
- Galago moholi – Southern lesser galago
- Galago senegalensis – Northern lesser galago
- Galagoides demidovii
- Galagoides kumbirensis
- Galagoides thomasi – Thomas's dwarf galago
- Galea comes
- Galea flavidens – Yellow-toothed cavy
- Galea leucoblephara
- Galea musteloides – Common yellow-toothed cavy
- Galea spixii – Spix's yellow-toothed cavy
- Galemys pyrenaicus – Pyrenean desman
- Galenomys garleppi – Gerlepp's mouse
- Galeopterus variegatus – Sunda flying lemur
- Galerella flavescens
- Galerella nigrata
- Galerella ochracea
- Galerella pulverulenta
- Galerella sanguinea
- Galictis cuja – Lesser grison
- Galictis vittata – Greater grison
- Galidia elegans – Ring-tailed vontsira
- Galidictis fasciata – Broad-striped vontsira
- Galidictis grandidieri – Grandidier's vontsira
- Gardnerycteris crenulatum
- Gardnerycteris koepckeae
- Gazella arabica – Arabian gazelle
- Gazella bennettii – Chinkara
- Gazella bilkis – Queen of sheba's gazelle
- Gazella cuvieri – Cuvier's gazelle
- Gazella dorcas – Dorcas gazelle
- Gazella gazella – Mountain gazelle
- Gazella leptoceros – Slender-horned gazelle
- Gazella marica
- Gazella saudiya – Saudi gazelle
- Gazella spekei – Speke's gazelle
- Gazella subgutturosa – Goitered gazelle
- Genetta abyssinica – Ethiopian genet
- Genetta angolensis – Miombo genet
- Genetta bourloni – Bourlon's genet
- Genetta cristata – Crested genet
- Genetta felina
- Genetta genetta – Common genet
- Genetta johnstoni – Johnston's genet
- Genetta maculata – Large-spotted genet
- Genetta pardina – Pardine genet
- Genetta piscivora – Aquatic genet
- Genetta poensis – King genet
- Genetta servalina – Servaline genet
- Genetta thierryi – Hausa genet
- Genetta tigrina – Cape genet
- Genetta victoriae – Giant genet
- Geocapromys brownii – Jamaican hutia
- Geocapromys columbianus – Cuban coney
- Geocapromys ingrahami – Bahaman hutia
- Geocapromys thoracatus – Little swan island hutia
- Geogale aurita – Large-eared tenrec
- Geomys arenarius – Desert pocket gopher
- Geomys attwateri – Attwater's pocket gopher
- Geomys breviceps – Baird's pocket gopher
- Geomys bursarius – Plains pocket gopher
- Geomys jugossicularis
- Geomys knoxjonesi – Knox jones's pocket gopher
- Geomys lutescens
- Geomys personatus – Texas pocket gopher
- Geomys pinetis – Cumberland island pocket gopher
- Geomys streckeri
- Geomys texensis – Central texas pocket gopher
- Geomys tropicalis – Tropical pocket gopher
- Georychus capensis – Cape mole rat
- Geosciurus inauris
- Geosciurus princeps
- Geoxus annectens
- Geoxus lafkenche
- Geoxus michaelseni
- Geoxus valdivianus – Long-clawed mole mouse
- Gerbilliscus afra – Cape gerbil
- Gerbilliscus boehmi – Boehm's gerbil
- Gerbilliscus brantsii – Highveld gerbil
- Gerbilliscus gambianus
- Gerbilliscus giffardi
- Gerbilliscus guineae – Guinea gerbil
- Gerbilliscus inclusus – Gorongoza gerbil
- Gerbilliscus kempi – Kemp's gerbil
- Gerbilliscus leucogaster – Bushveld gerbil
- Gerbilliscus nigricaudus – Black-tailed gerbil
- Gerbilliscus paeba
- Gerbilliscus phillipsi – Phillip's gerbil
- Gerbilliscus robustus – Fringe-tailed gerbil
- Gerbilliscus setzeri
- Gerbilliscus tytonis
- Gerbilliscus validus – Savanna gerbil
- Gerbilliscus vallinus
- Gerbilliscus vicinus
- Gerbillus acticola – Berbera gerbil
- Gerbillus agag – Agag gerbil
- Gerbillus amoenus – Pleasant gerbil
- Gerbillus andersoni – Anderson's gerbil
- Gerbillus aquilus – Swarthy gerbil
- Gerbillus bottai – Botta's gerbil
- Gerbillus brockmani – Brockman's gerbil
- Gerbillus burtoni – Burton's gerbil
- Gerbillus campestris – North african gerbil
- Gerbillus cheesmani – Cheesman's gerbil
- Gerbillus dasyurus – Wagner's gerbil
- Gerbillus dunni – Somalia gerbil
- Gerbillus famulus – Black-tufted gerbil
- Gerbillus floweri – Flower's gerbil
- Gerbillus garamantis
- Gerbillus gerbillus – Lesser egyptian gerbil
- Gerbillus gleadowi – Little hairy-footed gerbil
- Gerbillus grobbeni – Grobben's gerbil
- Gerbillus harwoodi – Harwood's gerbil
- Gerbillus henleyi – Pygmy gerbil
- Gerbillus hesperinus – Western gerbil
- Gerbillus hoogstraali – Hoogstraal's gerbil
- Gerbillus jamesi – James's gerbil
- Gerbillus latastei – Lataste's gerbil
- Gerbillus lowei – Lowe's gerbil
- Gerbillus mackillingini – Mackillingin's gerbil
- Gerbillus maghrebi – Greater short-tailed gerbil
- Gerbillus mauritaniae
- Gerbillus mesopotamiae – Mesopotamian gerbil
- Gerbillus muriculus – Darfur gerbil
- Gerbillus nancillus – Sudan gerbil
- Gerbillus nanus – Dwarf gerbil
- Gerbillus nigeriae – Nigerian gerbil
- Gerbillus occiduus – Occidental gerbil
- Gerbillus poecilops – Large aden gerbil
- Gerbillus principulus – Principal gerbil
- Gerbillus pulvinatus – Cushioned gerbil
- Gerbillus pusillus – Least gerbil
- Gerbillus pyramidum – Greater egyptian gerbil
- Gerbillus rosalinda – Rosalinda gerbil
- Gerbillus rupicola – Rupicolous gerbil
- Gerbillus simoni – Lesser short-tailed gerbil
- Gerbillus somalicus – Somalian gerbil
- Gerbillus stigmonyx – Khartoum gerbil
- Gerbillus syrticus
- Gerbillus tarabuli – Tarabul's gerbil
- Gerbillus vivax
- Gerbillus watersi – Waters's gerbil
- Giraffa camelopardalis – Giraffe
- Giraffa giraffa
- Giraffa reticulata
- Giraffa tippelskirchi
- Glaucomys oregonensis
- Glaucomys sabrinus – Carolina flying squirrel
- Glaucomys volans – Southern flying squirrel
- Glauconycteris alboguttata – Allen's striped bat
- Glauconycteris argentata – Silvered bat
- Glauconycteris beatrix – Beatrix's bat
- Glauconycteris curryae – Curry's bat
- Glauconycteris egeria – Bibundi bat
- Glauconycteris gleni – Glen's wattled bat
- Glauconycteris humeralis – Allen's spotted bat
- Glauconycteris kenyacola – Kenyan wattled bat
- Glauconycteris machadoi – Machado's butterfly bat
- Glauconycteris poensis – Abo bat
- Glauconycteris variegata – Variegated butterfly bat
- Glironia venusta – Bushy-tailed opossum
- Glirulus japonicus – Japanese dormouse
- Glis glis – Edible dormouse
- Glischropus aquilus
- Glischropus bucephalus
- Glischropus javanus – Javan thick-thumbed bat
- Glischropus tylopus – Common thick-thumbed bat
- Globicephala macrorhynchus – Short-finned pilot whale
- Globicephala melas – Long-finned pilot whale
- Glossophaga commissarisi – Commissaris's long-tongued bat
- Glossophaga leachii – Gray's long-tongued bat
- Glossophaga longirostris – Miller's long-tongued bat
- Glossophaga morenoi – Western long-tongued bat
- Glossophaga soricina – Pallas's long-tongued bat
- Glyphonycteris behnii – Behn's big-eared bat
- Glyphonycteris daviesi – Davies's big-eared bat
- Glyphonycteris sylvestris – Tri-colored big-eared bat
- Glyphotes simus – Sculptor squirrel
- Golunda ellioti – Indian bush-rat
- Gorilla beringei – Eastern gorilla
- Gorilla gorilla – Western gorilla
- Gracilimus radix
- Gracilinanus aceramarcae – Aceramarca gracile mouse opossum
- Gracilinanus agilis – Agile gracile opossum
- Gracilinanus dryas – Wood sprite gracile mouse opossum
- Gracilinanus emiliae – Emilia's gracile opossum
- Gracilinanus marica – Northern gracile mouse opossum
- Gracilinanus microtarsus – Brazilian gracile opossum
- Gracilinanus peruanus
- Grammomys aridulus – Arid woodland grammomys
- Grammomys brevirostris
- Grammomys buntingi – Bunting's thicket rat
- Grammomys caniceps – Grey-headed thicket rat
- Grammomys cometes – Mozambique thicket rat
- Grammomys dolichurus – Woodland thicket rat
- Grammomys dryas – Forest thicket rat
- Grammomys gigas – Giant thicket rat
- Grammomys ibeanus – Ruwenzori thicket rat
- Grammomys kuru – Eastern rainforest grammomys
- Grammomys macmillani – Macmillan's thicket rat
- Grammomys minnae – Ethiopian thicket rat
- Grammomys poensis
- Grammomys selousi – Selous thicket rat
- Grampus griseus – Risso's dolphin
- Graomys chacoensis
- Graomys domorum – Pale leaf-eared mouse
- Graomys edithae – Edith's leaf-eared mouse
- Graomys griseoflavus – Gray leaf-eared mouse
- Graphiurus angolensis
- Graphiurus christyi – Christy's dormouse
- Graphiurus crassicaudatus – Jentink's dormouse
- Graphiurus johnstoni
- Graphiurus kelleni – Kellen's dormouse
- Graphiurus lorraineus – Lorrain dormouse
- Graphiurus microtis – Small-eared dormouse
- Graphiurus monardi – Monard's dormouse
- Graphiurus murinus – Woodland dormouse
- Graphiurus nagtglasii
- Graphiurus ocularis – Spectacled dormouse
- Graphiurus platyops – Rock dormouse
- Graphiurus rupicola – Stone dormouse
- Graphiurus surdus – Silent dormouse
- Graphiurus walterverheyeni
- Gulo gulo – Wolverine
- Gyldenstolpia fronto
- Gyldenstolpia planaltensis
- Gymnobelideus leadbeateri – Leadbeater's possum
- Gymnuromys roberti
- Habromys chinanteco – Chinanteco deer mouse
- Habromys delicatulus – Delicate deer mouse
- Habromys ixtlani – Ixtlán deer mouse
- Habromys lepturus – Slender tailed deer mouse
- Habromys lophurus – Crested tailed deer mouse
- Habromys schmidlyi – Schmidly's deer mouse
- Habromys simulatus – Jico deer mouse
- Hadromys humei – Hume's rat
- Hadromys yunnanensis – Yunnan hadromys
- Haeromys margarettae – Margaret's haeromys
- Haeromys minahassae – Lowland sulawesi haeromys
- Haeromys pusillus – Sundaic haeromys
- Halichoerus grypus – Grey seal
- Halmaheramys bokimekot
- Handleyomys alfaroi – Alfaro's rice rat
- Handleyomys chapmani – Chapman's rice rat
- Handleyomys fuscatus – Dusky montane mouse
- Handleyomys guerrerensis
- Handleyomys intectus – Colombian rice rat
- Handleyomys melanotis – Black-eared rice rat
- Handleyomys rhabdops – Striped rice rat
- Handleyomys rostratus – Long-nosed rice rat
- Handleyomys saturatior – Cloud forest rice rat
- V — Multiple Hapalemur alaotrensis – Alaotra reed lemur
- Hapalemur aureus – Golden bamboo lemur
- Hapalemur griseus – Eastern lesser bamboo lemur
- V — Multiple Hapalemur meridionalis – Rusty-gray lesser bamboo lemur
- V — Multiple Hapalemur occidentalis – Sambirano lesser bamboo lemur
- V — Multiple Hapalomys delacouri – Lesser marmoset rat
- V — Multiple Hapalomys longicaudatus – Greater marmoset rat
- Hapalomys suntsovi
- Haplonycteris fischeri – Philippine pygmy fruit bat
- Harpiocephalus harpia – Lesser hairy-winged bat
- Harpiola grisea – Peter's tube-nosed bat
- Harpiola isodon – Taiwan tube-nosed bat
- Harpyionycteris celebensis – Sulawesi harpy fruit bat
- Harpyionycteris whiteheadi – Harpy fruit bat
- Heimyscus fumosus – African smoky mouse
- Helarctos malayanus – Sun bear
- Heliophobius argenteocinereus – Silvery mole rat
- Heliosciurus gambianus – Gambian sun squirrel
- Heliosciurus mutabilis – Mutable sun squirrel
- Heliosciurus punctatus – Small sun squirrel
- Heliosciurus rufobrachium – Isabelline red-legged sun squirrel
- Heliosciurus ruwenzorii – Ruwenzori sun squirrel
- Heliosciurus undulatus – Zanj sun squirrel
- Helogale hirtula – Somali dwarf mongoose
- Helogale parvula – Common dwarf mongoose
- Hemibelideus lemuroides – Lemuroid ringtail possum
- Hemicentetes nigriceps – Highland streaked tenrec
- Hemicentetes semispinosus – Lowland streaked tenrec
- Hemiechinus auritus – Long-eared hedgehog
- Hemiechinus collaris
- Hemigalus derbyanus – Banded civet
- Hemitragus jemlahicus – Himalayan tahr
- Herpailurus yagouaroundi – Jaguarundi
- Herpestes ichneumon – Egyptian mongoose
- Hesperoptenus blanfordi – Blanford's bat
- Hesperoptenus doriae – False serotine bat
- Hesperoptenus gaskelli – Gaskell's false serotine
- Hesperoptenus tickelli – Tickell's bat
- Hesperoptenus tomesi – Large false serotine
- Heterocephalus glaber – Naked mole-rat
- Heterogeomys cavator
- Heterogeomys cherriei
- Heterogeomys dariensis
- Heterogeomys heterodus
- Heterogeomys hispidus
- Heterogeomys lanius
- Heterogeomys underwoodi
- Heterohyrax brucei – Bush hyrax
- Heteromys adspersus
- Heteromys anomalus – Caribbean spiny pocket mouse
- Heteromys australis – Southern spiny pocket mouse
- Heteromys catopterius
- Heteromys desmarestianus – Desmarest's spiny pocket mouse
- Heteromys gaumeri – Gaumer's spiny pocket mouse
- Heteromys goldmani
- Heteromys irroratus
- Heteromys nelsoni – Nelson's spiny pocket mouse
- Heteromys nubicolens
- Heteromys oasicus
- Heteromys oresterus – Mountain spiny pocket mouse
- Heteromys pictus
- Heteromys salvini
- Heteromys spectabilis
- Heteromys teleus
- Heteropsomys insulans – Insular cave rat
- Hexolobodon phenax – Imposter hutia
- Hippidion principale
- Hippidion saldiasi
- Hippocamelus antisensis – Taruca
- Hippocamelus bisulcus – Patagonian huemul
- Hippopotamus amphibius – Hippopotamus
- Hippopotamus lemerlei – Madagascan dwarf hippopotamus
- Hippopotamus madagascariensis
- Hipposideros abae – Aba roundleaf bat
- Hipposideros alongensis
- Hipposideros armiger – Great himalayan leaf-nosed bat
- Hipposideros ater – Dusky leaf-nosed bat
- Hipposideros atrox
- Hipposideros beatus – Benito roundleaf bat
- Hipposideros bicolor – Bicolored leaf-nosed bat
- Hipposideros boeadii – Boeadi's roundleaf bat
- Hipposideros breviceps – Short-headed leaf-nosed bat
- Hipposideros caffer – Sundevall's roundleaf bat
- Hipposideros calcaratus – Spurred leaf-nosed bat
- Hipposideros camerunensis – Greater roundleaf bat
- Hipposideros cervinus – Fawn-colored leaf-nosed bat
- Hipposideros cineraceus – Least leaf-nosed bat
- Hipposideros coronatus – Large mindanao leaf-nosed bat
- Hipposideros corynophyllus – Telefomin leaf-nosed bat
- Hipposideros coxi – Cox's leaf-nosed bat
- Hipposideros crumeniferus – Timor leaf-nosed bat
- Hipposideros curtus – Short-tailed roundleaf bat
- Hipposideros demissus – Makira leaf-nosed bat
- Hipposideros diadema – Diadem leaf-nosed bat
- Hipposideros dinops – Fierce leaf-nosed bat
- Hipposideros doriae – Bornean leaf-nosed bat
- Hipposideros durgadasi – Durga das's leaf-nosed bat
- Hipposideros dyacorum – Dayak leaf-nosed bat
- Hipposideros edwardshilli – Hill's leaf-nosed bat
- Hipposideros einnaythu
- Hipposideros fasensis
- Hipposideros fuliginosus – Sooty roundleaf bat
- Hipposideros fulvus – Fulvus leaf-nosed bat
- Hipposideros galeritus – Cantor's leaf-nosed bat
- Hipposideros grandis – Grand leaf-nosed bat
- Hipposideros griffini
- Hipposideros halophyllus – Thailand leaf-nosed bat
- Hipposideros hypophyllus – Kolar leaf-nosed bat
- Hipposideros inexpectatus – Crested leaf-nosed bat
- Hipposideros inornatus – Arnhem leaf-nosed bat
- Hipposideros jonesi – Jones' roundleaf bat
- Hipposideros khaokhouayensis – Phou khao khouay leaf-nosed bat
- Hipposideros khasiana
- Hipposideros lamottei – Lamotte's roundleaf bat
- Hipposideros lankadiva – Indian leaf-nosed bat
- Hipposideros larvatus – Horsfield's leaf-nosed bat
- Hipposideros lekaguli – Large asian leaf-nosed bat
- Hipposideros lylei – Shield-faced leaf-nosed bat
- Hipposideros macrobullatus – Big-eared leaf-nosed bat
- Hipposideros madurae – Maduran leaf-nosed bat
- Hipposideros maggietaylorae – Maggie taylor's leaf-nosed bat
- Hipposideros marisae – Aellen's roundleaf bat
- Hipposideros megalotis – Ethiopian large-eared roundleaf bat
- Hipposideros muscinus – Fly river leaf-nosed bat
- Hipposideros nequam – Malayan leaf-nosed bat
- Hipposideros nicobarulae
- Hipposideros obscurus – Philippine forest leaf-nosed bat
- Hipposideros orbiculus – Orbiculus leaf-nosed bat
- Hipposideros papua – Biak leaf-nosed bat
- Hipposideros parnabyi
- Hipposideros pelingensis – Peleng leaf-nosed bat
- Hipposideros pendleburyi
- Hipposideros pomona – Andersen's leaf-nosed bat
- Hipposideros pratti – Pratt's leaf-nosed bat
- Hipposideros pygmaeus – Philippine pygmy leaf-nosed bat
- Hipposideros ridleyi – Ridley's leaf-nosed bat
- Hipposideros rotalis – Laotian leaf-nosed bat
- Hipposideros ruber – Noack's roundleaf bat
- Hipposideros scutinares – Shield-nosed leaf-nosed bat
- Hipposideros semoni – Semon's leaf-nosed bat
- Hipposideros sorenseni – Sorensen's leaf-nosed bat
- Hipposideros speoris – Schneider's leaf-nosed bat
- Hipposideros stenotis – Northern leaf-nosed bat
- Hipposideros sumbae – Sumban leaf-nosed bat
- Hipposideros tephrus
- Hipposideros turpis – Lesser leaf-nosed bat
- Hipposideros wollastoni – Wollaston's leaf-nosed bat
- Hippotragus equinus – Roan antelope
- Hippotragus leucophaeus – Bluebuck
- Hippotragus niger – Sable antelope
- Histiotus alienus – Strange big-eared brown bat
- Histiotus diaphanopterus
- Histiotus humboldti
- Histiotus laephotis – Thomas's big-eared brown bat
- Histiotus macrotus – Big-eared brown bat
- Histiotus magellanicus – Southern big-eared brown bat
- Histiotus montanus – Small big-eared brown bat
- Histiotus velatus – Tropical big-eared brown bat
- Histriophoca fasciata – Ribbon seal
- Hodomys alleni – Allen's wood rat
- Holochilus brasiliensis – Web-footed marsh rat
- Holochilus chacarius – Chaco marsh rat
- Holochilus lagigliai
- Holochilus sciureus – Marsh rat
- Holochilus venezuelae
- Holochilus vulpinus
- Homo denisova
- Homo heidelbergensis
- Homo neanderthalensis
- Homo sapiens – Human
- Homotherium serum
- Hoolock hoolock – Western hoolock gibbon
- Hoolock leuconedys – Eastern hoolock gibbon
- Hoolock tianxing
- Hoplomys gymnurus – Armored rat
- Hsunycteris cadenai
- Hsunycteris pattoni
- Hsunycteris thomasi
- Huetia leucorhina – Congo golden mole
- Hyaena brunnea
- Hyaena hyaena – Striped hyaena
- Hybomys badius – Eisentraut's striped mouse
- Hybomys basilii – Father basilio's striped mouse
- Hybomys lunaris – Moon striped mouse
- Hybomys planifrons – Liberian forest hybomys
- Hybomys trivirgatus – Temminck's striped mouse
- Hybomys univittatus – Peters' striped mouse
- Hydrictis maculicollis
- Hydrochoerus hydrochaeris – Capybara
- Hydrochoerus isthmius – Lesser capybara
- Hydrodamalis gigas – Steller's sea cow
- Hydromys chrysogaster – Common water rat
- Hydromys hussoni – Western water rat
- Hydromys neobritannicus – New britain water rat
- Hydromys ziegleri – Ziegler's water rat
- Hydropotes inermis – Water deer
- Hydrurga leptonyx – Leopard seal
- Hyemoschus aquaticus – Water chevrotain
- Hyladelphys kalinowskii – Kalinowski's mouse opossum
- Hylaeamys acritus
- Hylaeamys laticeps – Large-headed rice rat
- Hylaeamys megacephalus
- Hylaeamys oniscus – Sowbug rice rat
- Hylaeamys perenensis
- Hylaeamys tatei
- Hylaeamys yunganus – Yungas rice rat
- Hylobates abbotti
- Hylobates agilis – Agile gibbon
- Hylobates albibarbis – Bornean white-bearded gibbon
- Hylobates funereus
- Hylobates klossii – Kloss's gibbon
- Hylobates lar – Lar gibbon
- Hylobates moloch – Silvery gibbon
- Hylobates muelleri – Müller's bornean gibbon
- Hylobates pileatus – Pileated gibbon
- Hylochoerus meinertzhageni – Forest hog
- Hylomys megalotis – Long-eared gymnure
- Hylomys parvus – Dwarf gymnure
- Hylomys suillus – Short-tailed gymnure
- Hylomyscus aeta – Beaded hylomyscus
- Hylomyscus alleni – Allen's hylomyscus
- Hylomyscus anselli
- Hylomyscus arcimontensis
- Hylomyscus baeri – Baer's wood mouse
- Hylomyscus carillus – Angolan wood mouse
- Hylomyscus denniae – Montane wood mouse
- Hylomyscus endorobae
- Hylomyscus grandis – Mt oku hylomyscus
- Hylomyscus heinrichorum
- Hylomyscus kaimosae
- Hylomyscus kerbispeterhansi
- Hylomyscus pamfi
- Hylomyscus parvus – Little wood mouse
- Hylomyscus simus
- Hylomyscus stella – Stella wood mouse
- Hylomyscus vulcanorum
- Hylomyscus walterverheyeni – Walter verheyen's mouse
- Hylonycteris underwoodi – Underwood's long-tongued bat
- Hylopetes alboniger – Particolored flying squirrel
- Hylopetes bartelsi – Bartels's flying squirrel
- Hylopetes electilis
- Hylopetes nigripes – Palawan flying squirrel
- Hylopetes phayrei – Indochinese flying squirrel
- Hylopetes platyurus – Jentink's flying squirrel
- Hylopetes sagitta
- Hylopetes sipora – Sipora flying squirrel
- Hylopetes spadiceus – Red-cheeked flying squirrel
- Hylopetes winstoni – Sumatran flying squirrel
- Hyomys dammermani – Western white-eared giant rat
- Hyomys goliath – Eastern white-eared giant rat
- Hyorhinomys stuempkei
- Hyosciurus heinrichi – Montane long-nosed squirrel
- Hyosciurus ileile – Lowland long-nosed squirrel
- Hyperacrius fertilis – Burrowing vole
- Hyperacrius wynnei – Murree vole
- Hyperoodon ampullatus – North atlantic bottlenose whale
- Hyperoodon planifrons – Southern bottlenose whale
- Hypogeomys antimena – Malagasy giant jumping rat
- Hypsignathus monstrosus – Hammer-headed fruit bat
- Hypsiprymnodon moschatus – Musky rat kangaroo
- Hypsugo alaschanicus
- Hypsugo anchietae
- Hypsugo anthonyi
- Hypsugo arabicus
- Hypsugo ariel
- Hypsugo bemainty
- Hypsugo bodenheimeri
- Hypsugo cadornae
- Hypsugo crassulus
- Hypsugo dolichodon
- Hypsugo eisentrauti
- Hypsugo imbricatus
- Hypsugo joffrei
- Hypsugo kitcheneri
- Hypsugo lanzai
- Hypsugo lophurus
- Hypsugo macrotis
- Hypsugo musciculus
- Hypsugo pulveratus
- Hypsugo savii
- Hypsugo vordermanni
- Hystrix africaeaustralis – Cape porcupine
- Hystrix brachyura – Malayan porcupine
- Hystrix crassispinis – Thick-spined porcupine
- Hystrix cristata – Crested porcupine
- Hystrix indica – Indian crested porcupine
- Hystrix javanica – Sunda porcupine
- Hystrix pumila – Phillipine porcupine
- Hystrix sumatrae – Sumatran porcupine
- Ia io – Great evening bat
- Ichneumia albicauda – White-tailed mongoose
- Ichthyomys hydrobates – Crab-eating rat
- Ichthyomys pittieri – Pittier's crab-eating rat
- Ichthyomys stolzmanni – Stolzmann's crab-eating rat
- Ichthyomys tweedii – Tweedy's crab-eating rat
- Ictidomys mexicanus – Mexican ground squirrel
- Ictidomys parvidens
- Ictidomys tridecemlineatus – Thirteen-lined ground squirrel
- Ictonyx libyca
- Ictonyx striatus – Zorilla
- Idionycteris phyllotis – Allen's big-eared bat
- Idiurus macrotis – Long-eared scaly-tailed flying squirrel
- Idiurus zenkeri – Pygmy scaly-tailed flying squirrel
- Indopacetus pacificus – Indo-pacific beaked whale
- Indri indri – Indri
- Inia araguaiaensis
- Inia boliviensis
- Inia geoffrensis – Boto
- Iomys horsfieldii – Javanese flying squirrel
- Iomys sipora – Mentawi flying squirrel
- Irenomys tarsalis – Chilean climbing mouse
- Isolobodon montanus – Montane hutia
- Isolobodon portoricensis – Puerto rican hutia
- Isoodon auratus – Golden bandicoot
- Isoodon macrourus – Northern brown bandicoot
- Isoodon obesulus – Southern brown bandicoot
- Isothrix barbarabrownae – Barbara brown's brush-tailed rat
- Isothrix bistriata – Yellow-crowned brush-tailed rat
- Isothrix negrensis
- Isothrix orinoci – Orinoco brush-tailed rat
- Isothrix pagurus – Plain brush-tailed rat
- Isothrix sinnamariensis – Sinnamary brush-tailed rat
- Isthmomys flavidus – Yellow isthmus rat
- Isthmomys pirrensis – Mt. pirri isthmus rat
- Jaculus blanfordi – Blanford's jerboa
- Jaculus hirtipes
- Jaculus jaculus – Lesser egyptian jerboa
- Jaculus loftusi
- Jaculus orientalis – Greater egyptian jerboa
- Jaculus thaleri
- Juliomys ossitenuis
- Juliomys pictipes – Lesser wilfred's mouse
- Juliomys rimofrons – Cleft-headed juliomys
- Juliomys ximenezi
- Juscelinomys candango – Candango mouse
- Juscelinomys huanchacae
- Kadarsanomys sodyi – Javan bamboo rat
- Kannabateomys amblyonyx – Atlantic bamboo rat
- Kerivoula africana – Tanzanian woolly bat
- Kerivoula agnella – Louisiade woolly bat
- Kerivoula argentata – Silvered woolly bat
- Kerivoula cuprosa – Copper woolly bat
- Kerivoula depressa
- Kerivoula eriophora – Ethiopian woolly bat
- Kerivoula flora – Flores woolly bat
- Kerivoula furva
- Kerivoula hardwickii – Hardwicke's woolly bat
- Kerivoula intermedia – Small woolly bat
- Kerivoula kachinensis – Kachin woolly bat
- Kerivoula krauensis – Krau woolly bat
- Kerivoula lanosa – Lesser woolly bat
- Kerivoula lenis – Lenis woolly bat
- Kerivoula minuta – Least woolly bat
- Kerivoula muscina – Fly river woolly bat
- Kerivoula myrella – Manus island woolly bat
- Kerivoula papillosa – Papillose woolly bat
- Kerivoula pellucida – Clear-winged woolly bat
- Kerivoula phalaena – Spurrell's woolly bat
- Kerivoula picta – Painted woolly bat
- Kerivoula smithii – Smith's woolly bat
- Kerivoula titania – Titania's woolly bat
- Kerivoula whiteheadi – Whitehead's woolly bat
- Kerodon acrobata
- Kerodon rupestris – Rock cavy
- Kobus ellipsiprymnus – Waterbuck
- Kobus kob – Kob
- Kobus leche – Southern lechwe
- Kobus megaceros – Nile lechwe
- Kobus vardonii – Puku
- Kogia breviceps – Pygmy sperm whale
- Kogia sima – Dwarf sperm whale
- Komodomys rintjanus – Nusa tenggara komodomys
- Koopmania concolor – Brown fruit-eating bat
- Kunsia tomentosus – Woolly giant rat
- Laephotis angolensis – Angolan long-eared bat
- Laephotis botswanae – Botswanan long-eared bat
- Laephotis namibensis – Namibian long-eared bat
- Laephotis wintoni – De winton's long-eared bat
- Lagenodelphis hosei – Fraser's dolphin
- Lagenorhynchus acutus – Atlantic white-sided dolphin
- Lagenorhynchus albirostris – White-beaked dolphin
- Lagenorhynchus australis – Peale's dolphin
- Lagenorhynchus cruciger – Hourglass dolphin
- Lagenorhynchus obliquidens – Pacific white-sided dolphin
- Lagenorhynchus obscurus – Dusky dolphin
- Lagidium ahuacaense – Ecuadorean viscacha
- Lagidium viscacia – Southern mountain viscacha
- Lagidium wolffsohni – Wolffsohn's viscacha
- Lagorchestes asomatus – Kuluwarri
- Lagorchestes conspicillatus – Spectacled hare-wallaby
- Lagorchestes hirsutus – Rufous hare-wallaby
- Lagorchestes leporides – Eastern hare-wallaby
- Lagostomus crassus
- Lagostomus maximus – Plains viscacha
- Lagostrophus fasciatus – Banded hare wallaby
- Lagothrix cana – Peruvian woolly monkey
- Lagothrix flavicauda
- Lagothrix lagotricha – Humboldt's woolly monkey
- Lagothrix poeppigii – Poeppig's woolly monkey
- Lagurus lagurus – Steppe lemming
- Lama glama
- Lama guanicoe – Guanaco
- Lama pacos
- Lama vicugna – Vicuna
- Lamottemys okuensis – Mount oku rat
- Lampronycteris brachyotis – Yellow-throated big-eared bat
- Laonastes aenigmamus – Kha-nyou
- Lariscus hosei – Four-striped ground squirrel
- Lariscus insignis – Three-striped ground squirrel
- Lariscus niobe – Niobe ground squirrel
- Lariscus obscurus – Mentawai three-striped squirrel
- Lasionycteris noctivagans – Silver-haired bat
- Lasiopodomys brandtii – Brandt's vole
- Lasiopodomys gregalis
- Lasiopodomys mandarinus – Mandarin vole
- Lasiopodomys raddei
- Lasiorhinus krefftii – Northern hairy-nosed wombat
- Lasiorhinus latifrons – Southern hairy-nosed wombat
- Lasiurus atratus
- Lasiurus blossevillii – Southern red bat
- Lasiurus borealis – Eastern red bat
- Lasiurus castaneus – Tacarcunan bat
- Lasiurus degelidus – Jamaican red bat
- Lasiurus ebenus
- Lasiurus frantzii
- Lasiurus minor – Minor red bat
- Lasiurus pfeifferi – Pfeiffer's red bat
- Lasiurus seminolus – Seminole bat
- Lasiurus varius – Cinnamon red bat
- Latidens salimalii – Salim ali's fruit bat
- Lavia frons – Yellow-winged bat
- Leggadina forresti – Central short-tailed mouse
- Leggadina lakedownensis – Northern short-tailed mouse
- Leimacomys buettneri – Groove-toothed forest mouse
- Lemmiscus curtatus – Sagebrush vole
- Lemmus amurensis – Amur lemming
- Lemmus lemmus – Norway lemming
- Lemmus portenkoi
- Lemmus sibiricus – Siberian brown lemming
- Lemmus trimucronatus – Brown lemming
- Lemniscomys barbarus – Barbary striped grass mouse
- Lemniscomys bellieri – Bellier's striped grass mouse
- Lemniscomys griselda – Griselda's striped grass mouse
- Lemniscomys hoogstraali – Hoogstraal's striped grass mouse
- Lemniscomys linulus – Senegal one-striped grass mouse
- Lemniscomys macculus – Buffoon striped grass mouse
- Lemniscomys mittendorfi – Mittendorf's striped grass mouse
- Lemniscomys rosalia – Single-striped lemniscomys
- Lemniscomys roseveari – Rosevear's striped grass mouse
- Lemniscomys striatus – Typical striped grass mouse
- Lemniscomys zebra – Heuglin's striped grass mouse
- Lemur catta – Ring-tailed lemur
- Lenomys grovesi
- Lenomys meyeri – Meyer's lenomys
- Lenothrix canus – Sundaic lenothrix
- Lenoxus apicalis – Andean rat
- Leontocebus cruzlimai
- Leontocebus fuscicollis
- Leontocebus fuscus
- Leontocebus illigeri
- Leontocebus lagonotus
- Leontocebus leucogenys
- Leontocebus nigricollis
- Leontocebus nigrifrons
- Leontocebus tripartitus
- Leontocebus weddelli
- Leontopithecus caissara – Black-faced lion tamarin
- Leontopithecus chrysomelas – Golden-headed lion tamarin
- Leontopithecus chrysopygus – Golden-rumped lion tamarin
- Leontopithecus rosalia – Golden lion tamarin
- Leopardus colocola – Pampas cat
- Leopardus emiliae
- Leopardus geoffroyi – Geoffroy's cat
- Leopardus guigna – Guiña
- Leopardus guttulus
- Leopardus jacobita – Andean cat
- Leopardus pardalis – Ocelot
- Leopardus tigrinus – Northern tiger cat
- Leopardus wiedii – Margay
- Leopoldamys ciliatus – Sundaic mountain leopoldamys
- Leopoldamys diwangkarai
- Leopoldamys edwardsi – Edwards's long-tailed giant rat
- Leopoldamys herberti – Neill's leopoldamys
- Leopoldamys milleti – Millet's leopoldamys
- Leopoldamys revertens
- Leopoldamys sabanus – Long-tailed giant rat
- Leopoldamys siporanus – Mentawai archipelago leopoldamys
- Lepilemur aeeclis – Antafia sportive lemur
- Lepilemur ahmansonorum – Ahmanson's sportive lemur
- Lepilemur ankaranensis – Ankarana sportive lemur
- Lepilemur betsileo – Betsileo sportive lemur
- Lepilemur dorsalis – Gray's sportive lemur
- Lepilemur edwardsi – Milne-edwards's sportive lemur
- Lepilemur fleuretae – Fleurete's sportive lemur
- Lepilemur grewcockorum – Grewcock's sportive lemur
- Lepilemur hollandorum – Holland's sportive lemur
- Lepilemur hubbardorum – Hubbard's sportive lemur
- Lepilemur jamesorum – James' sportive lemur
- Lepilemur leucopus – White-footed sportive lemur
- Lepilemur microdon – Small-toothed sportive lemur
- Lepilemur milanoii – Daraina sportive lemur
- Lepilemur mittermeieri – Mittermeier's sportive lemur
- Lepilemur mustelinus – Weasel sportive lemur
- Lepilemur otto – Otto's sportive lemur
- Lepilemur petteri – Petter's sportive lemur
- Lepilemur randrianasoloi – Randrianasolo's sportive lemur
- Lepilemur ruficaudatus – Red-tailed sportive lemur
- Lepilemur sahamalazensis – Sahamalaza peninsula sportive lemur
- Lepilemur scottorum – Scott's sportive lemur
- Lepilemur seali – Seal's sportive lemur
- Lepilemur septentrionalis – Sahafary sportive lemur
- Lepilemur tymerlachsoni – Nosy be sportive lemur
- Lepilemur wrightae – Wright's sportive lemur
- Leporillus apicalis – Lesser stick-nest rat
- Leporillus conditor – Greater stick-nest rat
- Leptailurus serval – Serval
- Leptomys arfakensis
- Leptomys elegans – Large leptomys
- Leptomys ernstmayri – Ernst mayr's leptomys
- Leptomys paulus
- Leptomys signatus – Fly river leptomys
- Leptonychotes weddellii – Weddell seal
- Leptonycteris curasoae – Curaçaoan long-nosed bat
- Leptonycteris nivalis – Greater long-nosed bat
- Leptonycteris yerbabuenae – Lesser long-nosed bat
- Lepus alleni – Antelope jackrabbit
- Lepus americanus – Snowshoe hare
- Lepus arcticus – Arctic hare
- Lepus brachyurus – Japanese hare
- Lepus californicus – Black-tailed jackrabbit
- Lepus callotis – White-sided jackrabbit
- Lepus capensis – Cape hare
- Lepus castroviejoi – Broom hare
- Lepus comus – Yunnan hare
- Lepus coreanus – Korean hare
- Lepus corsicanus – Corsican hare
- Lepus europaeus – European hare
- Lepus fagani – Ethiopian hare
- Lepus flavigularis – Tehuantepec jackrabbit
- Lepus granatensis – Granada hare
- Lepus habessinicus – Abyssinian hare
- Lepus hainanus – Hainan hare
- Lepus insularis – Black jackrabbit
- Lepus mandschuricus
- Lepus nigricollis – Indian hare
- Lepus oiostolus – Woolly hare
- Lepus othus – Alaskan hare
- Lepus peguensis – Burmese hare
- Lepus saxatilis – Scrub hare
- Lepus sinensis – Chinese hare
- Lepus starcki – Ethiopian highland hare
- Lepus tibetanus – Desert hare
- Lepus timidus – Mountain hare
- Lepus tolai – Tolai hare
- Lepus townsendii – White-tailed jackrabbit
- Lepus victoriae
- Lepus yarkandensis – Yarkand hare
- Lestodelphys halli – Patagonian opossum
- Lestoros inca – Incan shrew opossum
- Liberiictis kuhni – Liberian mongoose
- Lichonycteris obscura – Dark long-tongued bat
- Limnomys bryophilus – Gray-bellied limnomys
- Limnomys sibuanus – White-bellied limnomys
- Lionycteris spurrelli – Chestnut long-tongued bat
- Lipotes vexillifer – Baiji
- Lissodelphis borealis – Northern right whale dolphin
- Lissodelphis peronii – Southern right whale dolphin
- Litocranius walleri – Gerenuk
- Lobodon carcinophaga – Crabeater seal
- Lonchophylla bokermanni – Bokermann's nectar bat
- Lonchophylla chocoana
- Lonchophylla concava
- Lonchophylla dekeyseri – Dekeyser's nectar bat
- Lonchophylla fornicata
- Lonchophylla handleyi – Handley's nectar bat
- Lonchophylla hesperia – Western nectar bat
- Lonchophylla inexpectata
- Lonchophylla mordax – Goldman's nectar bat
- Lonchophylla orcesi
- Lonchophylla orienticollina
- Lonchophylla peracchii
- Lonchophylla robusta – Orange nectar bat
- Lonchorhina aurita – Tomes's sword-nosed bat
- Lonchorhina fernandezi – Fernandez's sword-nosed bat
- Lonchorhina inusitata
- Lonchorhina mankomara
- Lonchorhina marinkellei – Marinkelle's sword-nosed bat
- Lonchorhina orinocensis – Orinoco sword-nosed bat
- Lonchothrix emiliae – Tuft-tailed spiny tree rat
- Lontra canadensis – North american river otter
- Lontra felina – Marine otter
- Lontra longicaudis – Neotropical otter
- Lontra provocax – Southern river otter
- Lophiomys imhausi – Crested rat
- Lophocebus albigena – Grey-cheeked mangabey
- Lophocebus aterrimus – Black mangabey
- Lophocebus johnstoni
- Lophocebus opdenboschi
- Lophocebus osmani
- Lophocebus ugandae
- Lophostoma brasiliense – Pygmy round-eared bat
- Lophostoma carrikeri – Carriker's round-eared bat
- Lophostoma evotis – Davis's round-eared bat
- Lophostoma kalkoae
- Lophostoma occidentalis
- Lophostoma schulzi – Schultz's round-eared bat
- Lophostoma silvicolum – White-throated round-eared bat
- Lophuromys angolensis
- Lophuromys ansorgei
- Lophuromys aquilus
- Lophuromys brevicaudus – Short-tailed brush-furred rat
- Lophuromys brunneus
- Lophuromys chercherensis
- Lophuromys chrysopus – Ethiopian forest brush-furred rat
- Lophuromys cinereus – Gray brush-furred rat
- Lophuromys dieterleni – Dieterlen's brush-furred mouse
- Lophuromys dudui
- Lophuromys eisentrauti
- Lophuromys flavopunctatus – Yellow-spotted brush-furred rat
- Lophuromys huttereri – Hutterer's brush-furred mouse
- Lophuromys kilonzoi
- Lophuromys laticeps
- Lophuromys luteogaster – Yellow-bellied brush-furred rat
- Lophuromys machangui
- Lophuromys makundii
- Lophuromys margarettae
- Lophuromys medicaudatus – Medium-tailed brush-furred rat
- Lophuromys melanonyx – Black-clawed brush-furred rat
- Lophuromys menageshae
- Lophuromys nudicaudus – Fire-bellied brush-furred rat
- Lophuromys pseudosikapusi
- Lophuromys rahmi – Rahm's brush-furred rat
- Lophuromys rita
- Lophuromys roseveari – Mount cameroon brush-furred rat
- Lophuromys sabunii
- Lophuromys sikapusi – Rusty-bellied brush-furred rat
- Lophuromys simensis
- Lophuromys stanleyi
- Lophuromys verhageni
- Lophuromys woosnami – Woosnam's brush-furred rat
- Lophuromys zena
- Lorentzimys nouhuysi – Long-footed tree mouse
- Loris lydekkerianus – Gray slender loris
- Loris tardigradus – Red slender loris
- Loxodonta africana – African elephant
- Loxodonta cyclotis
- Loxodontomys micropus – Southern pericote
- Lundomys molitor – Lund's amphibious rat
- Lutra lutra – Eurasian otter
- Lutra sumatrana – Hairy-nosed otter
- Lutreolina crassicaudata – Little water opossum
- Lutreolina massoia – Massoia's lutrine opossum
- Lutrogale perspicillata – Smooth-coated otter
- Lycalopex culpaeus
- Lycalopex fulvipes
- Lycalopex griseus
- Lycalopex gymnocercus
- Lycalopex sechurae
- Lycalopex vetulus
- Lycaon pictus – African wild dog
- Lyncodon patagonicus – Patagonian weasel
- Lynx canadensis – Canada lynx
- Lynx lynx – Eurasian lynx
- Lynx pardinus – Iberian lynx
- Lynx rufus – Bobcat
- Macaca arctoides – Stump-tailed macaque
- Macaca assamensis – Assam macaque
- Macaca cyclopis – Formosan rock macaque
- Macaca fascicularis – Nicobar crab-eating macaque
- Macaca fuscata – Japanese macaque
- Macaca hecki – Heck's macaque
- Macaca leonina – Northern pig-tailed macaque
- Macaca leucogenys
- Macaca maura – Moor macaque
- Macaca mulatta – Rhesus monkey
- Macaca munzala – Arunachal macaque
- Macaca nemestrina – Southern pig-tailed macaque
- Macaca nigra – Celebes crested macaque
- Macaca nigrescens – Gorontalo macaque
- Macaca ochreata – Booted macaque
- Macaca pagensis – Pagai island macaque
- Macaca radiata – Bonnet macaque
- Macaca siberu – Siberut macaque
- Macaca silenus – Lion-tailed macaque
- Macaca sinica – Toque macaque
- Macaca sylvanus – Barbary macaque
- Macaca thibetana – Milne-edwards' macaque
- Macaca tonkeana – Tonkean macaque
- Macroderma gigas – Ghost bat
- Macrogalidia musschenbroekii – Sulawesi civet
- Macroglossus minimus – Dagger-toothed long-nosed fruit bat
- Macroglossus sobrinus – Hill long-tongued fruit bat
- Macronycteris commersoni – Commerson's leaf-nosed bat
- Macronycteris cryptovalorona
- Macronycteris gigas – Giant leaf-nosed bat
- Macronycteris thomensis
- Macronycteris vittatus – Commerson's leafnosed bat
- Macrophyllum macrophyllum – Long-legged bat
- Macropus fuliginosus – Western gray kangaroo
- Macropus giganteus – Eastern grey kangaroo
- Macroscelides flavicaudatus – Namib round-eared sengi
- Macroscelides micus – Etendeka round-eared sengi
- Macroscelides proboscideus – Karoo round-eared sengi
- Macrotarsomys bastardi – Western big-footed mouse
- Macrotarsomys ingens – Long-tailed big-footed mouse
- Macrotarsomys petteri – Petter's big-footed mouse
- Macrotis lagotis – Bilby
- Macrotis leucura – Yallara
- Macrotus californicus – Californian leaf-nosed bat
- Macrotus waterhousii – Waterhouse's leaf-nosed bat
- Macruromys elegans – Lesser small-toothed rat
- Macruromys major – Greater small-toothed rat
- Madoqua cavendishi
- Madoqua damarensis
- Madoqua guentheri – Guenther's dik-dik
- Madoqua kirkii – Kirk's dik-dik
- Madoqua piacentinii – Silver dik-dik
- Madoqua saltiana – Salt's dik-dik
- Madoqua thomasi
- Madromys blanfordi – White-tailed wood rat
- Makalata didelphoides – Brazilian spiny tree rat
- Makalata macrura – Long-tailed tree rat
- Makalata obscura – Dark armored tree-rat
- Malacomys cansdalei – Cansdale's swamp rat
- Malacomys edwardsi – Edward's swamp rat
- Malacomys longipes – Big-eared swamp rat
- Malacothrix typica – Gerbil mouse
- Mallomys aroaensis – De vis's woolly rat
- Mallomys gunung – Alpine woolly rat
- Mallomys istapantap – Subalpine woolly rat
- Mallomys rothschildi – Rothschild's woolly rat
- Malpaisomys insularis
- Mammelomys lanosus – Highland mammelomys
- Mammelomys rattoides – Lowland mammelomys
- Mammut americanum
- Mammuthus columbi
- Mammuthus primigenius
- Mandrillus leucophaeus – Drill
- Mandrillus sphinx – Mandrill
- Manis crassicaudata – Indian pangolin
- Manis culionensis – Philippine pangolin
- Manis javanica – Sunda pangolin
- Manis pentadactyla – Chinese pangolin
- Margaretamys beccarii – Spiny lowland margaretamys
- Margaretamys christinae
- Margaretamys elegans – Elegant margaretamys
- Margaretamys parvus – Lesser margaretamys
- Marmosa alstoni – Alston's woolly mouse opossum
- Marmosa andersoni – Anderson's mouse opossum
- Marmosa constantiae – White-bellied wooly mouse opossum
- Marmosa demerarae – Woolly mouse opossum
- Marmosa isthmica
- Marmosa lepida – Little rufous mouse opossum
- Marmosa macrotarsus
- Marmosa mexicana – Mexican mouse opossum
- Marmosa murina – Linnaeus's mouse opossum
- Marmosa paraguayana
- Marmosa phaea – Little woolly mouse opossum
- Marmosa regina – Short-furred woolly mouse opossum
- Marmosa robinsoni – Robinson's mouse opossum
- Marmosa rubra – Red mouse opossum
- Marmosa simonsi
- Marmosa tyleriana – Tyler's mouse opossum
- Marmosa waterhousii
- Marmosa xerophila – Dryland mouse opossum
- Marmosa zeledoni
- Marmosops bishopi – Bishop's slender opossum
- Marmosops carri
- Marmosops chucha
- Marmosops cracens – Slim-faced slender mouse opossum
- Marmosops creightoni – Creighton's slender opossum
- Marmosops fuscatus – Gray-bellied slender mouse opossum
- Marmosops handleyi – Handley's slender mouse opossum
- Marmosops impavidus – Andean slender mouse opossum
- Marmosops incanus – Grey slender mouse opossum
- Marmosops invictus – Slaty slender mouse opossum
- Marmosops juninensis – Junin slender opossum
- Marmosops magdalenae
- Marmosops neblina – Neblina slender opossum
- Marmosops noctivagus – White-bellied slender mouse opossum
- Marmosops ocellatus – Spectacled slender opossum
- Marmosops ojastii
- Marmosops pakaraimae
- Marmosops parvidens – Delicate slender mouse opossum
- Marmosops paulensis – Brazilian slender opossum
- Marmosops pinheiroi – Pinheiro's slender opossum
- Marmota baibacina – Altai marmot
- Marmota bobak – Bobak marmot
- Marmota broweri – Alaska marmot
- Marmota caligata – Montague island hoary marmot
- Marmota camtschatica – Black-capped marmot
- Marmota caudata – Long-tailed marmot
- Marmota flaviventris – Yellow-bellied marmot
- Marmota himalayana – Karakoram marmot
- Marmota kastschenkoi
- Marmota marmota – Alpine marmot
- Marmota menzbieri – Menzbier's marmot
- Marmota monax – Woodchuck
- Marmota olympus – Olympic marmot
- Marmota sibirica – Mongolian marmot
- Marmota vancouverensis – Vancouver island marmot
- Martes americana – American marten
- Martes caurina
- Martes flavigula – Yellow-throated marten
- Martes foina – Beech marten
- Martes gwatkinsii – Nilgiri marten
- Martes martes – Pine marten
- Martes melampus – Japanese marten
- Martes zibellina – Sable
- Massoutiera mzabi – Mzab gundi
- Mastacomys fuscus – Broad-toothed rat
- Mastomys awashensis – Awash multimammate mouse
- Mastomys coucha – Southern multimammate mouse
- Mastomys erythroleucus – Guinea multimammate mouse
- Mastomys huberti – Hubert's mastomys
- Mastomys kollmannspergeri – Kollmannsperger's mastomys
- Mastomys natalensis – Natal multimammate mouse
- Mastomys pernanus – Dwarf mastomys
- Mastomys shortridgei – Shortridge's multimammate mouse
- Maxomys alticola – Bornean mountain maxomys
- Maxomys baeodon – Small bornean maxomys
- Maxomys bartelsii – Bartels's javan maxomys
- Maxomys dollmani – Dollman's sulawesi maxomys
- Maxomys hellwaldii – Hellwald's sulawesi maxomys
- Maxomys hylomyoides – Sumatran mountain maxomys
- Maxomys inas – Malayan mountain maxomys
- Maxomys inflatus – Broad-nosed sumatran maxomys
- Maxomys moi – Indochinese mountain maxomys
- Maxomys musschenbroekii – Musschenbroek's sulawesi maxomys
- Maxomys ochraceiventer – Ochraceous-bellied bornean maxomys
- Maxomys pagensis – Mentawai archipelago maxomys
- Maxomys panglima – Palawan maxomys
- Maxomys rajah – Rajah sundaic maxomys
- Maxomys surifer – Indomalayan maxomys
- Maxomys tajuddinii
- Maxomys wattsi – Watts's sulawesi maxomys
- Maxomys whiteheadi – Whitehead's sundaic maxomys
- Mazama americana – Red brocket
- Mazama bororo – Small red brocket
- Mazama chunyi – Peruvian dwarf brocket
- Mazama gouazoubira – Gray brocket
- Mazama nana – Brazilian dwarf brocket
- Mazama nemorivaga – Amazonian brown brocket
- Mazama pandora – Yucatan brown brocket
- Mazama rufina – Dwarf red brocket
- Mazama temama – Central american red brocket
- Mazama tienhoveni
- Megadendromus nikolausi – Nikolaus's mouse
- Megaderma lyra – Greater false vampire
- Megaderma spasma – Lesser false vampire
- Megadontomys cryophilus – Oaxacan giant deer mouse
- Megadontomys nelsoni – Nelson's giant deer mouse
- Megadontomys thomasi – Thomas's giant deer mouse
- Megaerops ecaudatus – Temminck's tailless fruit bat
- Megaerops kusnotoi – Javan tailless fruit bat
- Megaerops niphanae – Ratanaworabhan's fruit bat
- Megaerops wetmorei – White-collared fruit bat
- Megaladapis edwardsi
- Megaloceros giganteus
- Megaloglossus azagnyi – Western woermann's fruit bat
- Megaloglossus woermanni – Woermann's bat
- Megalomys desmarestii – Desmarest's pilorie
- Megalomys georginae
- Megalomys luciae – Santa lucian pilorie
- Megaoryzomys curioi – Galapágos giant rat
- Megaptera novaeangliae – Humpback whale
- Megasorex gigas – Mexican shrew
- Melanomys caliginosus – Dusky rice rat
- Melanomys chrysomelas
- Melanomys columbianus
- Melanomys idoneus
- Melanomys robustulus – Robust dark rice rat
- Melanomys zunigae – Zuniga's dark rice rat
- Melasmothrix naso – Diurnal sulawesian shrew rat
- Meles anakuma – Japanese badger
- Meles canescens
- Meles leucurus – Asian badger
- Meles meles – Eurasian badger
- Mellivora capensis – Honey badger
- Melogale cucphuongensis
- Melogale everetti – Bornean ferret badger
- Melogale moschata – Small-toothed ferret badger
- Melogale orientalis – Javan ferret badger
- Melogale personata – Large-toothed ferret badger
- Melomys aerosus – Dusky seram melomys
- Melomys arcium – Rossel island melomys
- Melomys bannisteri – Great kai island melomys
- Melomys bougainville – Bougainville melomys
- Melomys burtoni – Grassland melomys
- Melomys capensis – Cape york melomys
- Melomys caurinus – Short-tailed talaud melomys
- Melomys cervinipes – Fawn-footed melomys
- Melomys cooperae – Yamdena island melomys
- Melomys dollmani – Dollman's melomys
- Melomys fraterculus – Manusela melomys
- Melomys frigicola – Snow mountains grassland melomys
- Melomys fulgens – Seram long-tailed melomys
- Melomys howi – Riama island melomys
- Melomys leucogaster – White-bellied melomys
- Melomys lutillus – Grassland melomys
- Melomys matambuai – Manus melomys
- Melomys obiensis – Obi island melomys
- Melomys paveli – Pavel's seram melomys
- Melomys rubicola – Bramble cay melomys
- Melomys rufescens – Black-tailed melomys
- Melomys spechti
- Melomys talaudium – Long-tailed talaud melomys
- Melonycteris fardoulisi – Fardoulis's blossom bat
- Melonycteris melanops – Black-bellied blossom bat
- Melonycteris woodfordi – Woodford's blossom bat
- Melursus ursinus – Sloth bear
- Menetes berdmorei – Berdmore's squirrel
- Mephitis macroura – Hooded skunk
- Mephitis mephitis – Striped skunk
- Meriones arimalius – Arabian jird
- Meriones chengi – Cheng's jird
- Meriones crassus – Sundevall's jird
- Meriones dahli – Dahl's jird
- Meriones grandis
- Meriones hurrianae – Indian desert gerbil
- Meriones libycus – Libyan jird
- Meriones meridianus – Mid-day gerbil
- Meriones persicus – Persian jird
- Meriones rex – King jird
- Meriones sacramenti – Buxton's jird
- Meriones shawi – Shaw's jird
- Meriones tamariscinus – Tamarisk gerbil
- Meriones tristrami – Tristram's jird
- Meriones unguiculatus – Mongolian gerbil
- Meriones vinogradovi – Vinogradov's jird
- Meriones zarudnyi – Zarundny's jird
- Mesechinus dauuricus – Daurian hedgehog
- Mesechinus hughi – Hugh's hedgehog
- Mesembriomys gouldii – Black-footed tree-rat
- Mesembriomys macrurus – Golden-backed tree-rat
- Mesocapromys angelcabrerai – Cabrera's hutia
- Mesocapromys auritus – Large-eared hutia
- Mesocapromys melanurus
- Mesocapromys nanus – Dwarf hutia
- Mesocapromys sanfelipensis – Little earth hutia
- Mesocricetus auratus – Golden hamster
- Mesocricetus brandti – Brandt's hamster
- Mesocricetus newtoni – Romanian hamster
- Mesocricetus raddei – Ciscaucasian hamster
- Mesomys hispidus – Spiny tree rat
- Mesomys leniceps – Woolly-headed spiny tree rat
- Mesomys occultus – Tufted-tailed spiny tree-rat
- Mesomys stimulax – Surinam spiny tree rat
- Mesophylla macconnelli – Macconnell's bat
- Mesoplodon bidens – Sowerby's beaked whale
- Mesoplodon bowdoini – Andrew's beaked whale
- Mesoplodon carlhubbsi – Hubbs' beaked whale
- Mesoplodon densirostris – Blainville's beaked whale
- Mesoplodon europaeus – Gervais' beaked whale
- Mesoplodon ginkgodens – Ginkgo-toothed beaked whale
- Mesoplodon grayi – Gray's beaked whale
- Mesoplodon hectori – Hector's beaked whale
- Mesoplodon hotaula
- Mesoplodon layardii – Strap-toothed whale
- Mesoplodon mirus – True's beaked whale
- Mesoplodon perrini – Perrin's beaked whale
- Mesoplodon peruvianus – Pygmy beaked whale
- Mesoplodon stejnegeri – Stejneger's beaked whale
- Mesoplodon traversii – Spade-toothed whale
- Metachirus nudicaudatus – Brown four-eyed opossum
- Micaelamys granti
- Micaelamys namaquensis
- Mico acariensis – Rio acarí marmoset
- Mico argentatus – Silvery marmoset
- Mico chrysoleucus
- Mico emiliae – Snethlage's marmoset
- Mico humeralifer – Black and white tassel-ear marmoset
- Mico humilis
- Mico intermedius – Aripuanã marmoset
- Mico leucippe – Golden-white bare-ear marmoset
- Mico manicorensis
- Mico marcai – Marca's marmoset
- Mico mauesi – Maués marmoset
- Mico melanurus – Black-tailed marmoset
- Mico nigriceps – Black-headed marmoset
- Mico rondoni – Rondon's marmoset
- Mico saterei – Sateré marmoset
- Microakodontomys transitorius – Transitional colilargo
- Microcavia australis – Southern mountain cavy
- Microcavia niata – Andean mountain cavy
- Microcavia shiptoni – Shipton's mountain cavy
- Microcebus arnholdi – Arnhold's mouse lemur
- Microcebus berthae – Madame berthe's mouse lemur
- Microcebus bongolavensis – Bongolava mouse lemur
- Microcebus boraha
- Microcebus danfossi – Danfoss' mouse lemur
- Microcebus ganzhorni
- Microcebus gerpi – Gerp's mouse lemur
- Microcebus griseorufus – Grey-brown mouse lemur
- Microcebus jollyae – Jolly's mouse lemur
- Microcebus lehilahytsara – Goodman's mouse lemur
- Microcebus macarthurii – Macarthur's mouse lemur
- Microcebus mamiratra – Claire's mouse lemur
- Microcebus manitatra
- Microcebus margotmarshae – Margot marsh's mouse lemur
- Microcebus marohita – Marohita mouse lemur
- Microcebus mittermeieri – Mittermeier's mouse lemur
- Microcebus murinus – Grey mouse lemur
- Microcebus myoxinus – Peters' mouse lemur
- Microcebus ravelobensis – Golden-brown mouse lemur
- Microcebus rufus – Rufous mouse lemur
- Microcebus sambiranensis – Sambirano mouse lemur
- Microcebus simmonsi – Simmons' mouse lemur
- Microcebus tanosi
- Microcebus tavaratra – Tavaratra mouse lemur
- Microdillus peeli – Somali pygmy gerbil
- Microdipodops megacephalus – Owyhee river kangaroo mouse
- Microdipodops pallidus – Soda spring valley kangaroo mouse
- Microgale brevicaudata
- Microgale cowani – Cowan's shrew tenrec
- Microgale drouhardi – Drouhard's shrew tenrec
- Microgale dryas – Dryad shrew tenrec
- Microgale fotsifotsy – Pale shrew tenrec
- Microgale gracilis – Gracile shrew tenrec
- Microgale grandidieri
- Microgale gymnorhyncha – Naked-nosed shrew tenrec
- Microgale jenkinsae – Jenkins' shrew tenrec
- Microgale jobihely – Northern shrew tenrec
- Microgale longicaudata – Lesser long-tailed shrew tenrec
- Microgale majori – Major's long-tailed tenrec
- Microgale mergulus
- Microgale monticola – Montane shrew tenrec
- Microgale nasoloi – Nasolo's shrew tenrec
- Microgale parvula – Pygmy shrew tenrec
- Microgale principula – Greater long-tailed shrew tenrec
- Microgale pusilla – Least shrew tenrec
- Microgale soricoides – Shrew-toothed shrew tenrec
- Microgale taiva – Taiva shrew tenrec
- Microgale thomasi – Thomas' shrew tenrec
- Microhydromys argenteus – Southern groovetoothed moss-mouse
- Microhydromys richardsoni
- Micromys erythrotis
- Micromys minutus – Eurasian harvest mouse
- Micronycteris brosseti
- Micronycteris buriri
- Micronycteris giovanniae
- Micronycteris hirsuta – Hairy big-eared bat
- Micronycteris matses
- Micronycteris megalotis – Little big-eared bat
- Micronycteris microtis – Common big-eared bat
- Micronycteris minuta – White-bellied big-eared bat
- Micronycteris sanborni
- Micronycteris schmidtorum – Schmidts's big-eared bat
- Micronycteris yatesi
- Microperoryctes aplini – Arfak pygmy bandicoot
- Microperoryctes longicauda – Striped bandicoot
- Microperoryctes murina – Mouse bandicoot
- Microperoryctes papuensis – Papuan bandicoot
- Micropotamogale lamottei – Nimba otter shrew
- Micropotamogale ruwenzorii – Rwenzori otter shrew
- Micropteropus intermedius – Hayman's lesser epauletted fruit bat
- Micropteropus pusillus – Peter's dwarf epauletted fruit bat
- Microryzomys altissimus – Highland small rice rat
- Microryzomys minutus – Forest small rice rat
- Microsciurus alfari – Central american dwarf squirrel
- Microsciurus flaviventer – Amazon dwarf squirrel
- Microsciurus mimulus – Western dwarf squirrel
- Microsciurus santanderensis – Santander dwarf squirrel
- Microtus abbreviatus – Insular vole
- Microtus afghanus
- Microtus agrestis – Field vole
- Microtus anatolicus
- Microtus arvalis – Common vole
- Microtus brachycercus – Calabria pine vole
- Microtus breweri – Beach vole
- Microtus bucharensis
- Microtus cabrerae – Cabrera's vole
- Microtus californicus – Amargosa vole
- Microtus canicaudus – Gray-tailed vole
- Microtus chrotorrhinus – Southern rock vole
- Microtus daghestanicus – Daghestan pine vole
- Microtus dogramacii
- Microtus duodecimcostatus – Mediterranean pine vole
- Microtus elbeyli
- Microtus felteni – Balkan pine vole
- Microtus gerbei – Pyrenean pine vole
- Microtus guatemalensis – Guatemalan vole
- Microtus guentheri – Günther's vole
- Microtus hartingi
- Microtus hyperboreus – North siberian vole
- Microtus ilaeus – Kazakhstan vole
- Microtus irani – Persian vole
- Microtus juldaschi
- Microtus liechtensteini – Liechtenstein's pine vole
- Microtus longicaudus – San bernardino long-tailed vole
- Microtus lusitanicus – Lusitanian pine vole
- Microtus lydius
- Microtus majori – Major's pine vole
- Microtus mexicanus – Mexican vole
- Microtus miurus – Singing vole
- Microtus montanus – Pahranagat valley montane vole
- Microtus multiplex – Alpine pine vole
- Microtus mustersi
- Microtus mystacinus
- Microtus nasarovi – Nasarov's vole
- Microtus nebrodensis
- Microtus oaxacensis – Tarabundi vole
- Microtus obscurus
- Microtus ochrogaster – Prairie vole
- Microtus oregoni – Creeping vole
- Microtus paradoxus – Kopetdag pine vole
- Microtus pennsylvanicus – Chihuahua vole
- Microtus pinetorum – Woodland vole
- Microtus qazvinensis
- Microtus quasiater – Jalapan pine vole
- Microtus richardsoni – Water vole
- Microtus savii – Savi's pine vole
- Microtus schelkovnikovi – Schelkovnikov's pine vole
- Microtus schidlovskii – Schidlovsky pine vole
- Microtus socialis – Social vole
- Microtus subterraneus – European pine vole
- Microtus tatricus – Tatra vole
- Microtus thomasi – Thomas's pine vole
- Microtus townsendii – Townsend's vole
- Microtus transcaspicus – Baluchistan vole
- Microtus umbrosus – Zempoaltepec vole
- Microtus xanthognathus – Taiga vole
- Millardia gleadowi – Sand-coloured metad
- Millardia kathleenae – Burmese metad
- Millardia kondana – Kondana rat
- Millardia meltada – Soft-furred metad
- Mimetillus moloneyi – Moloney's flat-headed bat
- Mimon bennettii – Southern golden bat
- Mimon cozumelae – Cozumelan golden bat
- Mindomys hammondi – Hammond's rice rat
- Miniopterus aelleni
- Miniopterus africanus
- Miniopterus ambohitrensis
- Miniopterus arenarius
- Miniopterus australis – Little long-fingered bat
- Miniopterus bassanii
- Miniopterus blepotis
- Miniopterus brachytragos
- Miniopterus egeri
- Miniopterus fraterculus – Lesser long-fingered bat
- Miniopterus fuliginosus
- Miniopterus fuscus – Southeast asian long-fingered bat
- Miniopterus gleni – Glen's long-fingered bat
- Miniopterus griffithsi
- Miniopterus griveaudi
- Miniopterus inflatus – Greater long-fingered bat
- Miniopterus macrocneme – Small melanesian bent-winged bat
- Miniopterus maghrebensis
- Miniopterus magnater – Large bent-winged bat
- Miniopterus mahafaliensis
- Miniopterus majori – Major's long-fingered bat
- Miniopterus manavi – Manavil long-fingered bat
- Miniopterus medius – Medium bent-winged bat
- Miniopterus minor – Least long-fingered bat
- Miniopterus mossambicus
- Miniopterus natalensis – Natal long-fingered bat
- Miniopterus newtoni
- Miniopterus oceanensis
- Miniopterus orianae
- Miniopterus pallidus
- Miniopterus paululus – Philippine long-fingered bat
- Miniopterus petersoni – Peterson's long-fingered bat
- Miniopterus pusillus – Small long-fingered bat
- Miniopterus robustior – Loyalty bent-winged bat
- Miniopterus schreibersii – Schreiber's bent-winged bat
- Miniopterus shortridgei – Shortridge's long-fingered bat
- Miniopterus sororculus – Sororcula long-fingered bat
- Miniopterus tristis – Great long-fingered bat
- Miopithecus ogouensis – Northern talapoin monkey
- Miopithecus talapoin – Southern talapoin monkey
- Miracinonyx trumani
- Mirimiri acrodonta – Fijian monkey-faced bat
- Mirounga angustirostris – Northern elephant seal
- Mirounga leonina – Southern elephant seal
- Mirza coquereli – Coquerel's giant mouse lemur
- Mirza zaza – Northern giant mouse lemur
- Mirzamys louiseae
- Mirzamys norahae
- Mogera etigo – Etigo mole
- Mogera imaizumii – Small japanese mole
- Mogera insularis – Insular mole
- Mogera kanoana
- Mogera latouchei
- Mogera tokudae – Sado mole
- Mogera uchidai – Senkaku mole
- Mogera wogura – Large japanese mole
- Molossops neglectus – Rufous dog-faced bat
- Molossops temminckii – Dwarf dog-faced bat
- Molossus alvarezi
- Molossus aztecus – Aztec mastiff bat
- Molossus coibensis – Coiban mastiff bat
- Molossus currentium – Bonda mastiff bat
- Molossus molossus – Pallas's mastiff bat
- Molossus pretiosus – Miller's mastiff bat
- Molossus rufus – Black mastiff bat
- Molossus sinaloae – Sinaloan mastiff bat
- Molossus trinitatus
- Molossus tropidorhynchus
- Monachus monachus – Mediterranean monk seal
- Monodelphis adusta – Sepia short-tailed opossum
- Monodelphis americana – Northern three-striped opossum
- Monodelphis arlindoi
- Monodelphis brevicaudata – Northern red-sided opossum
- Monodelphis dimidiata – Southern short-tailed opossum
- Monodelphis domestica – Grey short-tailed opossum
- Monodelphis emiliae – Emilia's short-tailed opossum
- Monodelphis gardneri
- Monodelphis glirina – Amazonian red-sided opossum
- Monodelphis handleyi – Handley's short-tailed opossum
- Monodelphis iheringi – Ihering's short-tailed opossum
- Monodelphis kunsi – Pygmy short-tailed opossum
- Monodelphis osgoodi – Osgood's short-tailed opossum
- Monodelphis palliolata – Hooded red-sided opossum
- Monodelphis peruviana
- Monodelphis pinocchio
- Monodelphis reigi – Reig's opossum
- Monodelphis ronaldi – Ronald's opossum
- Monodelphis saci
- Monodelphis sanctaerosae
- Monodelphis scalops – Long-nosed short-tailed opossum
- Monodelphis touan
- Monodelphis unistriata
- Monodon monoceros – Narwhal
- Monophyllus plethodon – Insular single-leaf bat
- Monophyllus redmani – Leach's single-leaf bat
- Monticolomys koopmani – Malagasy mountain mouse
- Mops bakarii
- Mops brachypterus – Sierra leone mops bat
- Mops condylurus – Angolan mops bat
- Mops congicus – Medje mops bat
- Mops demonstrator – Mongalla mops bat
- Mops leonis
- Mops leucostigma – Malagasy white-bellied free-tailed bat
- Mops midas – Midas mops bat
- Mops mops – Malayan free-tailed bat
- Mops nanulus – Dwarf mops bat
- Mops niangarae – Niangara mops bat
- Mops niveiventer – White-bellied mops bat
- Mops petersoni – Peterson's mops bat
- Mops sarasinorum – Sulawesian free-tailed bat
- Mops spurrelli – Spurrell's mops bat
- Mops thersites – Railer bat
- Mops trevori – Trevor's mops bat
- Mormoops blainvillei – Antillean ghost-faced bat
- Mormoops megalophylla – Peters's ghost-faced bat
- Mormopterus acetabulosus – Natal free-tailed bat
- Mormopterus beccarii – Beccari's free-tailed bat
- Mormopterus cobourgianus
- Mormopterus doriae – Sumatran mastiff bat
- Mormopterus eleryi
- Mormopterus francoismoutoui
- Mormopterus halli
- Mormopterus jugularis – Peters' wrinkle-lipped bat
- Mormopterus kalinowskii
- Mormopterus kitcheneri
- Mormopterus loriae – Little northern free-tailed bat
- Mormopterus lumsdenae
- Mormopterus minutus – Little goblin bat
- Mormopterus norfolkensis – East-coast free-tailed bat
- Mormopterus petersi
- Mormopterus phrudus – Incan little mastiff bat
- Mormopterus planiceps – Southern free-tailed bat
- Mormopterus ridei
- Moschiola indica – Indian chevrotain
- Moschiola kathygre – Yellow-striped chevrotain
- Moschiola meminna – White-spotted chevrotain
- Moschus anhuiensis – Anhui musk deer
- Moschus berezovskii – Forest musk deer
- Moschus chrysogaster – Alpine musk deer
- Moschus cupreus – Kashmir muskdeer
- Moschus fuscus – Black musk deer
- Moschus leucogaster – Himalayan muskdeer
- Moschus moschiferus – Siberian musk deer
- Mosia nigrescens – Lesser sheath-tailed bat
- Mungos gambianus – Gambian mongoose
- Mungos mungo – Banded mongoose
- Mungotictis decemlineata – Bokiboky
- Mungotictis lineata
- Muntiacus atherodes – Bornean yellow muntjac
- Muntiacus crinifrons – Black muntjac
- Muntiacus feae – Fea's muntjac
- Muntiacus gongshanensis – Gongshan muntjac
- Muntiacus montanus – Sumatran mountain muntjac
- Muntiacus muntjak – Southern red muntjac
- Muntiacus puhoatensis – Puhoat muntjac
- Muntiacus putaoensis – Leaf muntjac
- Muntiacus reevesi – Reeves' muntjac
- Muntiacus rooseveltorum – Roosevelts' muntjac
- Muntiacus truongsonensis – Annamite muntjac
- Muntiacus vaginalis – Northern red muntjac
- Muntiacus vuquangensis – Large-antlered muntjac
- Murexia habbema – Habbema dasyure
- Murexia longicaudata – Short-furred dasyure
- Murexia melanurus – Black-tailed dasyure
- Murexia naso – Long-nosed dasyure
- Murexia rothschildi – Broad-striped dasyure
- Murina aenea – Bronze tube-nosed bat
- Murina annamitica
- Murina aurata – Tibetan tube-nosed bat
- Murina balaensis
- Murina beelzebub
- Murina bicolor
- Murina chrysochaetes
- Murina cineracea
- Murina cyclotis – Round-eared tube-nosed bat
- Murina eleryi
- Murina fanjingshanensis
- Murina feae
- Murina fionae
- Murina florium – Flute-nosed bat
- Murina fusca – Dusky tube-nosed bat
- Murina gracilis
- Murina guilleni
- Murina harpioloides
- Murina harrisoni – Harrison's murine bat
- Murina hilgendorfi – Hilgendorf's tube-nosed bat
- Murina huttoni – White-bellied tube-nosed bat
- Murina jaintiana
- Murina kontumensis
- Murina leucogaster – Rufous tube-nosed bat
- Murina loreliae
- Murina peninsularis
- Murina pluvialis
- Murina puta – Taiwanese tube-nosed bat
- Murina recondita
- Murina rozendaali – Gilded tube-nosed bat
- Murina ryukyuana – Ryukyu tube-nosed bat
- Murina shuipuensis
- Murina suilla – Brown tube-nosed bat
- Murina tenebrosa – Gloomy tube-nosed bat
- Murina tiensa
- Murina tubinaris – Scully's tube-nosed bat
- Murina ussuriensis – Ussuri tube-nosed bat
- Murina walstoni
- Mus baoulei – Baoule's mouse
- Mus booduga – Little indian field mouse
- Mus bufo – Toad mouse
- Mus callewaerti – Callewaert's mouse
- Mus caroli – Ryukyu mouse
- Mus cervicolor – Fawn-colored mouse
- Mus cookii – Ryley's spiny mouse
- Mus crociduroides – Sumatran shrewlike mouse
- Mus cypriacus
- Mus famulus – Bonhote's mouse
- Mus fernandoni – Ceylon spiny mouse
- Mus fragilicauda – Sheath-tailed mouse
- Mus goundae – Gounda mouse
- Mus haussa – Hausa mouse
- Mus imberbis
- Mus indutus – Desert pygmy mouse
- Mus lepidoides
- Mus macedonicus – Macedonian mouse
- Mus mahomet – Mahomet mouse
- Mus mattheyi – Matthey's mouse
- Mus mayori – Mayor's mouse
- Mus minutoides – Pygmy mouse
- Mus musculoides
- Mus musculus – House mouse
- Mus neavei – Neave's mouse
- Mus nitidulus
- Mus orangiae – Free state pygmy mouse
- Mus oubanguii – Oubangui mouse
- Mus pahari – Gairdner's shrewmouse
- Mus phillipsi – Wroughton's small spiny mouse
- Mus platythrix – Brown spiny mouse
- Mus saxicola – Brown spiny mouse
- Mus setulosus – Peter's mouse
- Mus setzeri – Setzer's pygmy mouse
- Mus shortridgei – Shortridge's mouse
- Mus sorella – Thomas's pygmy mouse
- Mus spicilegus – Steppe mouse
- Mus spretus – Western mediterranean mouse
- Mus tenellus – Delicate mouse
- Mus terricolor – Earth-colored mouse
- Mus triton – Gray-bellied pygmy mouse
- Mus vulcani – Javan shrew-like mouse
- Muscardinus avellanarius – Hazel dormouse
- Musonycteris harrisoni – Banana bat
- Musseromys anacuao
- Musseromys beneficus
- Musseromys gulantang
- Musseromys inopinatus
- Mustela africana – Amazon weasel
- Mustela altaica – Altai weasel
- Mustela erminea – Stoat
- Mustela eversmanii – Steppe polecat
- Mustela felipei – Colombian weasel
- Mustela frenata – Long-tailed weasel
- Mustela itatsi – Japanese weasel
- Mustela kathiah – Yellow-bellied weasel
- Mustela lutreola – European mink
- Mustela lutreolina – Indonesian mountain weasel
- Mustela nigripes – Black-footed ferret
- Mustela nivalis – Least weasel
- Mustela nudipes – Malay weasel
- Mustela putorius – Western polecat
- Mustela sibirica – Siberian weasel
- Mustela strigidorsa – Stripe-backed weasel
- Mustela subpalmata – Egyptian weasel
- Mydaus javanensis – Sunda stink-badger
- Mydaus marchei – Palawan stink-badger
- Mylodon darwinii
- Mylomys dybowskii – African groove-toothed rat
- Mylomys rex – Ethiopian mylomys
- Myocastor coypus – Coypu
- Myodes californicus – Western red-backed vole
- Myodes centralis – Tien shan red-backed vole
- Myodes gapperi – Southern red-backed vole
- Myodes glareolus – Bank vole
- Myodes macrotis – Large-eared vole
- Myodes rutilus – Northern red-backed vole
- Myoictis leucura – Woolley's three-striped dasyure
- Myoictis melas – Müller's three-striped dasyure
- Myoictis wallacei – Wallace's three-striped dasyure
- Myoictis wavicus – Tate's three-striped dasyure
- Myomimus personatus – Masked mouse-tailed dormouse
- Myomimus roachi – Roach's mouse-tailed dormouse
- Myomimus setzeri – Setzer's mouse-tailed dormouse
- Myomyscus angolensis – Angolan multimammate mouse
- Myomyscus brockmani – Brockman's myomyscus
- Myomyscus verreauxii – Verreaux's mouse
- Myomyscus yemeni – Yemeni mouse
- Myonycteris angolensis
- Myonycteris brachycephala – Sao tomé collared fruit bat
- Myonycteris leptodon
- Myonycteris relicta – East african little collared fruit bat
- Myonycteris torquata – Little collared fruit bat
- Myoprocta acouchy – Red acouchi
- Myoprocta pratti – Green acouchi
- Myopterus daubentonii – Daubenton's free-tailed bat
- Myopterus whitleyi – Bini free-tailed bat
- Myopus schisticolor – Wood lemming
- Myosciurus pumilio – African pygmy squirrel
- Myosorex babaulti – Babault's mouse shrew
- Myosorex blarina – Montane mouse shrew
- Myosorex bururiensis – Bururi forest shrew
- Myosorex cafer – Dark-footed forest shrew
- Myosorex eisentrauti – Eisentraut's mouse shrew
- Myosorex geata – Geata mouse shrew
- Myosorex gnoskei – Nyika burrowing shrew
- Myosorex jejei – Kahuzi swamp shrew
- Myosorex kabogoensis
- Myosorex kihaulei – Kihaule's mouse shrew
- Myosorex longicaudatus – Long-tailed forest shrew
- Myosorex meesteri
- Myosorex okuensis – Oku mouse shrew
- Myosorex rumpii – Rumpi mouse shrew
- Myosorex schalleri – Schaller's mouse shrew
- Myosorex sclateri – Sclater's tiny mouse shrew
- Myosorex tenuis – Thin mouse shrew
- Myosorex varius – Forest shrew
- Myosorex zinki – Kilimanjaro mouse shrew
- Myospalax armandii
- Myospalax aspalax – False zokor
- Myospalax epsilanus
- Myospalax myospalax – Siberian zokor
- Myospalax psilurus – Transbaikal zokor
- Myotis abei
- Myotis adversus – Large-footed myotis
- Myotis aelleni – Southern myotis
- Myotis albescens – Silver-tipped myotis
- Myotis alcathoe – Alcathoe whiskered bat
- Myotis altarium – Szechwan myotis
- Myotis anjouanensis – Anjouan myotis
- Myotis annamiticus – Annamit myotis
- Myotis annatessae
- Myotis annectans – Hairy-faced bat
- Myotis atacamensis – Atacama myotis
- Myotis ater – Peters's myotis
- Myotis attenboroughi
- Myotis aurascens – Steppe whiskered bar
- Myotis auriculus – Southwestern myotis
- Myotis australis – Australian myotis
- Myotis austroriparius – Southeastern myotis
- Myotis badius
- Myotis bartelsi
- Myotis bechsteinii – Bechstein's myotis
- Myotis blythii – Lesser mouse-eared myotis
- Myotis bocagii – Bocage's mouse-eared bat
- Myotis bombinus – Far eastern myotis
- Myotis borneoensis
- Myotis brandtii – Brandt's myotis
- Myotis browni
- Myotis bucharensis – Bokhara whiskered bat
- Myotis californicus – Californian myotis
- Myotis capaccinii – Long-fingered bat
- Myotis caucensis
- Myotis chiloensis – Chilean myotis
- Myotis chinensis – Large myotis
- Myotis ciliolabrum – Western small-footed myotis
- Myotis clydejonesi
- Myotis cobanensis – Guatemalan myotis
- Myotis csorbai – Csorba's mouse-eared myotis
- Myotis dasycneme – Pond myotis
- Myotis daubentonii – Daubenton's myotis
- Myotis davidii – David's myotis
- Myotis dieteri
- Myotis diminutus
- Myotis dinellii
- Myotis dominicensis – Dominican myotis
- Myotis elegans – Elegant myotis
- Myotis emarginatus – Geoffroy's bat
- Myotis escalerai
- Myotis evotis – Long-eared myotis
- Myotis federatus
- Myotis fimbriatus – Fringed long-footed myotis
- Myotis findleyi – Findley's myotis
- Myotis flavus
- Myotis formosus – Hodgson's bat
- Myotis fortidens – Cinnamon myotis
- Myotis frater – Long-tailed whiskered bat
- Myotis gomantongensis – Gomantong myotis
- Myotis goudoti – Malagasy mouse-eared bat
- Myotis grisescens – Gray myotis
- Myotis handleyi
- Myotis hasseltii – Lesser large-footed myotis
- Myotis hermani – Herman's myotis
- Myotis horsfieldii – Horsfield's myotis
- Myotis hosonoi
- Myotis hyrcanicus
- Myotis ikonnikovi – Ikonnikov's bat
- Myotis indochinensis
- Myotis insularum – Insular myotis
- Myotis izecksohni
- Myotis keaysi – Hairy-legged myotis
- Myotis keenii – Keen's myotis
- Myotis laniger – Chinese water myotis
- Myotis lavali
- Myotis leibii – Eastern small-footed myotis
- Myotis levis – Yellowish myotis
- Myotis longipes – Kashmir cave bat
- Myotis lucifugus – Little brown myotis
- Myotis macrodactylus – Big-footed myotis
- Myotis macropus – Large-footed myotis
- Myotis macrotarsus – Pallid large-footed myotis
- Myotis martiniquensis – Schwartz's myotis
- Myotis melanorhinus – Dark-nosed small-footed myotis
- Myotis midastactus
- Myotis moluccarum – Maluku myotis
- Myotis montivagus – Burmese whiskered myotis
- Myotis morrisi – Morris's bat
- Myotis muricola – Nepalese whiskered myotis
- Myotis myotis – Greater mouse-eared bat
- Myotis mystacinus – Whiskered myotis
- Myotis nattereri – Natterer's bat
- Myotis nesopolus – Curacao myotis
- Myotis nigricans – Black myotis
- Myotis nipalensis – Nepal myotis
- Myotis nyctor
- Myotis occultus – Arizona myotis
- Myotis oreias – Singaporese whiskered myotis
- Myotis oxygnathus
- Myotis oxyotus – Montane myotis
- Myotis ozensis
- Myotis peninsularis – Peninsular myotis
- Myotis pequinius – Peking myotis
- Myotis petax
- Myotis peytoni
- Myotis phanluongi
- Myotis pilosatibialis
- Myotis pilosus – Rickett's big-footed myotis
- Myotis planiceps
- Myotis pruinosus – Frosted myotis
- Myotis punicus – Maghreb mouse-eared bat
- Myotis ridleyi – Ridley's myotis
- Myotis riparius – Riparian myotis
- Myotis rosseti – Thick-thumbed myotis
- Myotis ruber – Red myotis
- Myotis rufoniger
- Myotis rufopictus – Orange-fingered myotis
- Myotis schaubi – Schaub's myotis
- Myotis scotti – Scott's mouse-eared bat
- Myotis secundus
- Myotis septentrionalis – Northern myotis
- Myotis sibiricus
- Myotis sicarius – Mandelli's mouse-eared myotis
- Myotis siligorensis – Himalayan whiskered myotis
- Myotis simus – Velvety myotis
- Myotis sodalis – Indiana bat
- Myotis soror
- Myotis stalkeri – Stalker's myotis
- Myotis thysanodes – Fringed myotis
- Myotis tricolor – Temminck's mouse-eared bat
- Myotis velifer – Cave myotis
- Myotis vivesi – Fish-eating bat
- Myotis volans – Long-legged myotis
- Myotis weberi
- Myotis welwitschii – Welwitsch's mouse-eared bat
- Myotis yanbarensis – Yanbaru whiskered bat
- Myotis yesoensis
- Myotis yumanensis – Yuma myotis
- Myotragus balearicus
- Myrmecobius fasciatus – Numbat
- Myrmecophaga tridactyla – Giant anteater
- Mysateles garridoi
- Mysateles prehensilis – Prehensile-tailed hutia
- Mystacina robusta – New zealand greater short-tailed bat
- Mystacina tuberculata – New zealand lesser short-tailed bat
- Mystromys albicaudatus – White-tailed mouse
- Myzopoda aurita – Eastern sucker-footed bat
- Myzopoda schliemanni – Schliemann's sucker-footed bat
- Nandinia binotata – African palm civet
- Nanger dama – Dama gazelle
- Nanger granti – Grant's gazelle
- Nanger notatus
- Nanger petersii
- Nanger soemmerringii – Soemmerring's gazelle
- Nannosciurus melanotis – Black-eared squirrel
- Nannospalax ehrenbergi
- Nannospalax leucodon
- Nannospalax xanthodon
- Nanonycteris veldkampii – Veldkamp's bat
- Napaeozapus abietorum
- Napaeozapus insignis – Woodland jumping mouse
- Nasalis larvatus – Proboscis monkey
- Nasua narica – White-nosed coati
- Nasua nasua – South american coati
- Nasuella meridensis – Eastern mountain coati
- Nasuella olivacea – Western mountain coati
- Natalus espiritosantensis
- Natalus jamaicensis – Jamaican greater funnel-eared bat
- Natalus major – Hispaniolan greater funnel-eared bat
- Natalus mexicanus – Mexican greater funnel-eared bat
- Natalus primus – Cuban greater funnel-eared bat
- Natalus saturatus
- Natalus stramineus – Mexican funnel-eared bat
- Natalus tumidirostris – Trinidadian funnel-eared bat
- Neacomys amoenus
- Neacomys dubosti – Dubost's bristly mouse
- Neacomys guianae – Guiana bristly mouse
- Neacomys minutus
- Neacomys musseri
- Neacomys paracou
- Neacomys pictus – Painted bristly mouse
- Neacomys spinosus – Bristly mouse
- Neacomys tenuipes – Narrow-footed bristly mouse
- Neacomys vargasllosai
- Neamblysomus gunningi – Gunning's golden mole
- Neamblysomus julianae – Juliana's golden mole
- Necromys amoenus – Pleasant bolo mouse
- Necromys lactens – Rufous-bellied bolo mouse
- Necromys lasiurus – Hairy-tailed bolo mouse
- Necromys lenguarum
- Necromys lilloi
- Necromys obscurus – Dark bolo mouse
- Necromys punctulatus – Spotted bolo mouse
- Necromys urichi – Northern grass mouse
- Nectogale elegans – Elegant water shrew
- Nectomys apicalis
- Nectomys magdalenae
- Nectomys palmipes – Trinidad water rat
- Nectomys rattus – Common water rat
- Nectomys saturatus
- Nectomys squamipes – South american water rat
- Nelsonia goldmani – Nelson and goodman's wood rat
- Nelsonia neotomodon – Diminutive wood rat
- Nemorhaedus baileyi
- Nemorhaedus caudatus
- Nemorhaedus evansi
- Nemorhaedus goral
- Nemorhaedus griseus
- Nemorhaedus hodgsoni
- Neodon clarkei
- Neodon forresti – Forrest's mountain vole
- Neodon fuscus
- Neodon irene – Irene's mountain vole
- Neodon leucurus
- Neodon linzhiensis – Linzhi mountain vole
- Neodon medogensis
- Neodon nyalamensis
- Neodon sikimensis – Sikkim vole
- Neofelis diardi – Sunda clouded leopard
- Neofelis nebulosa – Clouded leopard
- Neofiber alleni – Round-tailed muskrat
- Neohylomys hainanensis – Hainan gymnure
- Neomicroxus bogotensis
- Neomicroxus latebricola
- Neomonachus schauinslandi – Hawaiian monk seal
- Neomonachus tropicalis – Caribbean monk seal
- Neomys anomalus – Southern water shrew
- Neomys fodiens – Eurasian water shrew
- Neomys milleri
- Neomys teres – Transcaucasian water shrew
- Neonycteris pusilla – Least big-eared bat
- Neophascogale lorentzii – Speckled dasyure
- Neophoca cinerea – Australian sea lion
- Neophocaena asiaeorientalis – Finless porpoise
- Neophocaena phocaenoides – Indo-pacific finless porpoise
- Neoplatymops mattogrossensis
- Neopteryx frosti – Small-toothed fruit bat
- Neoromicia brunnea – Dark-brown serotine
- Neoromicia capensis – Cape bat
- Neoromicia flavescens – Yellow pipistrelle bat
- Neoromicia grandidieri
- Neoromicia guineensis – Guinean pipistrelle bat
- Neoromicia helios – Samburu pipistrelle bat
- Neoromicia isabella
- Neoromicia malagasyensis – Isalo serotine
- Neoromicia matroka – Malagasy serotine
- Neoromicia melckorum – Melck's pipistrelle bat
- Neoromicia nana – Banana pipistrelle bat
- Neoromicia rendalli – Rendall's serotine
- Neoromicia robertsi
- Neoromicia roseveari
- Neoromicia somalica – Somali serotine
- Neoromicia stanleyi
- Neoromicia tenuipinnis – Slenderwinged pipistrelle bat
- Neoromicia zuluensis – Zulu pipistrelle bat
- Neotamias alpinus
- Neotamias amoenus
- Neotamias bulleri
- Neotamias canipes
- Neotamias cinereicollis
- Neotamias dorsalis
- Neotamias durangae
- Neotamias merriami
- Neotamias minimus
- Neotamias obscurus
- Neotamias ochrogenys
- Neotamias palmeri
- Neotamias panamintinus
- Neotamias quadrimaculatus
- Neotamias quadrivittatus
- Neotamias ruficaudus
- Neotamias rufus
- Neotamias senex
- Neotamias siskiyou
- Neotamias sonomae
- Neotamias speciosus
- Neotamias townsendii
- Neotamias umbrinus
- Neotetracus sinensis – Shrew gymnure
- Neotoma albigula – White-throated woodrat
- Neotoma angustapalata – Tamaulipan woodrat
- Neotoma anthonyi – Anthony's woodrat
- Neotoma bryanti – Bryant's woodrat
- Neotoma bunkeri – Bunker's woodrat
- Neotoma chrysomelas – Nicaraguan woodrat
- Neotoma cinerea – Bushy-tailed woodrat
- Neotoma devia – Arizona woodrat
- Neotoma ferruginea
- Neotoma floridana – Key largo woodrat
- Neotoma fuscipes – Dusky-footed woodrat
- Neotoma goldmani – Goldman's woodrat
- Neotoma insularis
- Neotoma lepida – Desert woodrat
- Neotoma leucodon – White-toothed woodrat
- Neotoma macrotis – Big-eared woodrat
- Neotoma magister – Allegheny woodrat
- Neotoma martinensis – San martin island woodrat
- Neotoma melanura
- Neotoma mexicana – Mexican woodrat
- Neotoma micropus – Southern plains woodrat
- Neotoma nelsoni – Nelson's woodrat
- Neotoma palatina – Bolano's woodrat
- Neotoma phenax – Sonoran woodrat
- Neotoma picta
- Neotoma stephensi – Stephen's woodrat
- Neotomodon alstoni – Mexican volcano mouse
- Neotomys ebriosus – Andean swamp rat
- Neotragus batesi – Bates' pygmy antelope
- Neotragus moschatus – Suni
- Neotragus pygmaeus – Royal antelope
- Neovison macrodon – Sea mink
- Neovison vison – American mink
- Nephelomys albigularis – Tomes's rice rat
- Nephelomys auriventer – Ecuadorean rice rat
- Nephelomys caracolus
- Nephelomys childi
- Nephelomys devius – Boquete rice rat
- Nephelomys keaysi – Keays's rice rat
- Nephelomys levipes – Light-footed rice rat
- Nephelomys maculiventer
- Nephelomys meridensis
- Nephelomys moerex
- Nephelomys nimbosus
- Nephelomys pectoralis
- Nephelomys pirrensis
- Nesogale dobsoni
- Nesogale talazaci
- Nesokia bunnii – Bunn's short-tailed bandicoot rat
- Nesokia indica – Short-tailed bandicoot rat
- Nesolagus netscheri – Sumatran striped rabbit
- Nesolagus timminsi – Annamite striped rabbit
- Nesomys audeberti – Lowland red forest rat
- Nesomys lambertoni – Lowland red forest rat
- Nesomys rufus – Eastern red forest rat
- Nesophontes edithae – Puerto rican nesophontes
- Nesophontes hypomicrus – Atalaye nesophontes
- Nesophontes major
- Nesophontes micrus – Western cuban nesophontes
- Nesophontes paramicrus – St. michel nesophontes
- Nesophontes zamicrus – Haitian nesophontes
- Nesoromys ceramicus – Seram island mountain rat
- Nesoryzomys darwini – Darwin's galapagos mouse
- Nesoryzomys fernandinae – Fernandina galapagos mouse
- Nesoryzomys indefessus – Indefatigable galapagos mouse
- Nesoryzomys narboroughi
- Nesoryzomys swarthi – Santiago galapagos mouse
- Neurotrichus gibbsii – Shrew-mole
- Neusticomys ferreirai
- Neusticomys monticolus – Montane fish-eating rat
- Neusticomys mussoi – Musso's fish-eating rat
- Neusticomys oyapocki – Oyapock's fish-eating rat
- Neusticomys peruviensis – Peruvian fish-eating rat
- Neusticomys venezuelae – Venezuelan fish-eating rat
- Neusticomys vossi
- Nilgiritragus hylocrius – Nilgiri tahr
- Nilopegamys plumbeus – Ethiopian amphibious rat
- Ningaui ridei – Wongai ningaui
- Ningaui timealeyi – Pilbara ningaui
- Ningaui yvonneae – Southern ningaui
- Niumbaha superba
- Niviventer andersoni – Anderson's niviventer
- Niviventer brahma – Brahma white-bellied rat
- Niviventer bukit
- Niviventer cameroni – Cameron highlands niviventer
- Niviventer confucianus – Confucian niviventer
- Niviventer coninga – Spiny taiwan niviventer
- Niviventer cremoriventer – Sundaic arboreal niviventer
- Niviventer culturatus – Soft-furred taiwan niviventer
- Niviventer eha – Little himalayan rat
- Niviventer excelsior – Sichuan niviventer
- Niviventer fraternus – Montane sumatran niviventer
- Niviventer fulvescens – Chestnut white-bellied rat
- Niviventer hinpoon – Limestone niviventer
- Niviventer huang
- Niviventer lepturus – Montane javan niviventer
- Niviventer ling
- Niviventer lotipes
- Niviventer niviventer – Himalayan white-bellied rat
- Niviventer rapit – Montane bornean niviventer
- Niviventer tenaster – Indochinese mountain niviventer
- Noctilio albiventris – Lesser bulldog bat
- Noctilio leporinus – Greater bulldog bat
- Nomascus annamensis
- Nomascus concolor – Black crested gibbon
- Nomascus gabriellae – Red-cheeked gibbon
- Nomascus hainanus – Hainan gibbon
- Nomascus leucogenys – Northern white-cheeked gibbon
- Nomascus nasutus – Cao-vit gibbon
- Nomascus siki – Southern white-cheeked gibbon
- Noronhomys vespuccii
- Notamacropus agilis
- Notamacropus dorsalis
- Notamacropus eugenii
- Notamacropus greyi
- Notamacropus irma
- Notamacropus parma
- Notamacropus parryi
- Notamacropus rufogriseus
- Nothrotheriops shastensis
- Notiomys edwardsii – Edwards's long-clawed mouse
- Notiosorex cockrumi – Cockrum's grey shrew
- Notiosorex crawfordi – Desert shrew
- Notiosorex evotis – Large-eared grey shrew
- Notiosorex villai – Villa's grey shrew
- Notocitellus adocetus – Lesser tropical ground squirel
- Notocitellus annulatus – Ring-tailed ground squirrel
- Notomys alexis – Spinifex hopping mouse
- Notomys amplus – Short-tailed hopping-mouse
- Notomys aquilo – Northern hopping-mouse
- Notomys cervinus – Fawn hopping-mouse
- Notomys fuscus – Dusky hopping-mouse
- Notomys longicaudatus – Long-tailed hopping-mouse
- Notomys macrotis – Big-eared hopping-mouse
- Notomys mitchellii – Mitchell's hopping mouse
- Notomys mordax – Darling downs hopping-mouse
- Notomys robustus
- Notopteris macdonaldi – Fijian blossom bat
- Notopteris neocaledonica – New caledonia blossom bat
- Notoryctes caurinus – Kakarratul
- Notoryctes typhlops – Itjaritjari
- Nyala angasii – Nyala
- Nyctalus aviator – Japanese large noctule
- Nyctalus azoreum – Azorean bat
- Nyctalus furvus – Japanese noctule
- Nyctalus lasiopterus – Giant noctule
- Nyctalus leisleri – Lesser noctule
- Nyctalus montanus – Mountain noctule
- Nyctalus noctula – Noctule
- Nyctalus plancyi – Chinese noctule
- Nyctereutes procyonoides – Raccoon dog
- Nyctereutes viverrinus
- Nycteris arge – Bate's slit-faced bat
- Nycteris aurita – Andersen's slit-faced bat
- Nycteris gambiensis – Gambian slit-faced bat
- Nycteris grandis – Large slit-faced bat
- Nycteris hispida – Hairy long-eared bat
- Nycteris intermedia – Intermediate slit-faced bat
- Nycteris javanica – Javan slit-faced bat
- Nycteris macrotis – Large-eared slit-faced bat
- Nycteris madagascariensis – Madagascar slit-faced bat
- Nycteris major – Dja slit-faced bat
- Nycteris nana – Dwarf slit-faced bat
- Nycteris parisii – Parisi's slit-faced bat
- Nycteris thebaica – Cape long-eared bat
- Nycteris tragata – Malayan slit-faced bat
- Nycteris vinsoni – Vinson's slit-faced bat
- Nycteris woodi – Wood's slit-faced bat
- Nycticebus bancanus
- Nycticebus bengalensis – Bengal slow loris
- Nycticebus borneanus
- Nycticebus coucang – Greater slow loris
- Nycticebus javanicus – Javan slow loris
- Nycticebus kayan
- Nycticebus menagensis – Philippine slow loris
- Nycticebus pygmaeus – Pygmy slow loris
- Nycticeinops schlieffeni – Schlieffen's bat
- Nycticeius aenobarbus – Temminck's mysterious bat
- Nycticeius cubanus – Cuban evening bat
- Nycticeius humeralis – Evening bat
- Nyctiellus lepidus – Gervais's funnel-eared bat
- Nyctimene aello – Greater tube-nosed bat
- Nyctimene albiventer – Common tube-nosed fruit bat
- Nyctimene cephalotes – Pallas's tube-nosed bat
- Nyctimene certans – Mountain tube-nosed bat
- Nyctimene cyclotis – Round-eared tube-nosed bat
- Nyctimene draconilla – Lesser tube-nosed bat
- Nyctimene keasti – Keast's tube-nosed fruit bat
- Nyctimene major – Island tube-nosed bat
- Nyctimene malaitensis – Malaita tube-nosed bat
- Nyctimene masalai – Demonic tube-nosed bat
- Nyctimene minutus – Lesser tube-nosed fruit bat
- Nyctimene rabori – Philippine tube-nosed fruit bat
- Nyctimene robinsoni – Eastern tube-nosed bat
- Nyctimene sanctacrucis – Nendö tube-nosed bat
- Nyctimene vizcaccia – Umboi tube-nosed bat
- Nyctinomops aurispinosus – Peale's free-tailed bat
- Nyctinomops femorosaccus – Pocketed free-tailed bat
- Nyctinomops laticaudatus – Broad-eared free-tailed bat
- Nyctinomops macrotis – Big free-tailed bat
- Nyctomys sumichrasti – Vesper rat
- Nyctophilus arnhemensis – Northern long-eared bat
- Nyctophilus bifax – Eastern long-eared bat
- Nyctophilus corbeni
- Nyctophilus daedalus
- Nyctophilus geoffroyi – Lesser long-eared bat
- Nyctophilus gouldi – Gould's long-eared bat
- Nyctophilus heran – Sundan long-eared bat
- Nyctophilus howensis – Lord howe long-eared bat
- Nyctophilus major
- Nyctophilus microdon – Small-toothed long-eared bat
- Nyctophilus microtis – Papuan long-eared bat
- Nyctophilus nebulosus – New caledonia long-eared bat
- Nyctophilus sherrini – Tasmanian long-eared bat
- Nyctophilus shirleyae
- Nyctophilus timoriensis
- Nyctophilus walkeri – Pygmy long-eared bat
- Ochotona alpina – Alpine pika
- Ochotona argentata – Silver pika
- Ochotona cansus – Gansu pika
- Ochotona collaris – Collared pika
- Ochotona coreana – Korean pika
- Ochotona curzoniae – Plateau pika
- Ochotona dauurica – Daurian pika
- Ochotona erythrotis – Chinese red pika
- Ochotona forresti – Forrest's pika
- Ochotona gloveri – Glover's pika
- Ochotona hoffmanni – Hoffmann's pika
- Ochotona hyperborea – Northern pika
- Ochotona iliensis – Ili pika
- Ochotona koslowi – Kozlov's pika
- Ochotona ladacensis – Ladak pika
- Ochotona macrotis – Large-eared pika
- Ochotona mantchurica – Manchurian pika
- Ochotona nubrica – Nubra pika
- Ochotona opaca
- Ochotona pallasi
- Ochotona princeps – American pika
- Ochotona pusilla – Steppe pika
- Ochotona roylei – Royle's pika
- Ochotona rufescens – Afghan pika
- Ochotona rutila – Turkestan red pika
- Ochotona sikimaria
- Ochotona syrinx – Qinling pika
- Ochotona thibetana – Moupin pika
- Ochotona thomasi – Thomas's pika
- Ochotona turuchanensis – Turuchan pika
- Ochrotomys nuttalli – Golden mouse
- Octodon bridgesi – Bridges's degu
- Octodon degus – Degu
- Octodon lunatus – Moon-toothed degu
- Octodon pacificus
- Octodontomys gliroides – Mountain degu
- Octomys mimax – Viscacha rat
- Odobenus rosmarus – Walrus
- Odocoileus hemionus – Mule deer
- Odocoileus virginianus – White-tailed deer
- Oecomys auyantepui
- Oecomys bicolor – Bicolored arboreal rice rat
- Oecomys catherinae
- Oecomys cleberi – Cleber's arboreal rice rat
- Oecomys concolor – Natterer's oecomys
- Oecomys flavicans – Yellow arboreal rice rat
- Oecomys franciscorum
- Oecomys mamorae – Mamore arboreal rice rat
- Oecomys paricola – Brazilian arboreal rice rat
- Oecomys phaeotis – Dusky arboreal rice rat
- Oecomys rex – King arboreal rice rat
- Oecomys roberti – Robert's arboreal rice rat
- Oecomys rutilus – Red arboreal rice rat
- Oecomys speciosus – Arboreal rice rat
- Oecomys superans – Foothill arboreal rice rat
- Oecomys sydandersoni
- Oecomys trinitatis – Long-furred rice rat
- Oenomys hypoxanthus – Rufous-nosed rat
- Oenomys ornatus – Ghana rufous-nosed rat
- Okapia johnstoni – Okapi
- Olallamys albicauda – White-tailed olalla rat
- Olallamys edax – Greedy olalla rat
- Oligoryzomys andinus – Andean pygmy rice rat
- Oligoryzomys arenalis – Sandy pygmy rice rat
- Oligoryzomys brendae – Brenda's colilargo
- Oligoryzomys chacoensis – Chacoan pygmy rice rat
- Oligoryzomys costaricensis
- Oligoryzomys delicatus
- Oligoryzomys destructor – Destructive pygmy rice rat
- Oligoryzomys flavescens – Yellow pygmy rice rat
- Oligoryzomys fornesi – Fornes' colilargo
- Oligoryzomys fulvescens – Fulvous pygmy rice rat
- Oligoryzomys griseolus – Grayish pygmy rice rat
- Oligoryzomys longicaudatus – Long-tailed pygmy rice rat
- Oligoryzomys mattogrossae
- Oligoryzomys messorius
- Oligoryzomys microtis – Small-eared pygmy rice rat
- Oligoryzomys moojeni
- Oligoryzomys nigripes – Black-footed pygmy rice rat
- Oligoryzomys rupestris
- Oligoryzomys stramineus
- Oligoryzomys utiaritensis
- Oligoryzomys vegetus – Sprightly pygmy rice rat
- Oligoryzomys victus – St. vincent pygmy rice rat
- Ommatophoca rossii – Ross seal
- Ondatra zibethicus – Muskrat
- Onychogalea fraenata – Bridled nailtail wallaby
- Onychogalea lunata – Crescent nailtail wallaby
- Onychogalea unguifera – Northern nailtail wallaby
- Onychomys arenicola – Chihuahuan grasshopper mouse
- Onychomys leucogaster – Northern grasshopper mouse
- Onychomys torridus – Southern grasshopper mouse
- Orcaella brevirostris – Irrawaddy dolphin
- Orcaella heinsohni – Australian snubfin dolphin
- Orcinus orca – Killer whale
- Oreamnos americanus – Mountain goat
- Oreamnos harringtoni
- Oreoryzomys balneator – Peruvian rice rat
- Oreoscaptor mizura – Japanese mountain mole
- Oreotragus oreotragus – Klipspringer
- Orientallactaga balikunica – Balikun jerboa
- Orientallactaga bullata – Gobi jerboa
- Orientallactaga sibirica – Siberian jerboa
- Ornithorhynchus anatinus – Platypus
- Orthogeomys grandis – Giant pocket gopher
- Orycteropus afer – Aardvark
- Oryctolagus cuniculus – European rabbit
- Oryx beisa – Beisa oryx
- Oryx dammah – Scimitar-horned oryx
- Oryx gazella – Gemsbok
- Oryx leucoryx – Arabian oryx
- Oryzomys albiventer
- Oryzomys antillarum – Jamaican rice rat
- Oryzomys couesi – Coues's rice rat
- Oryzomys dimidiatus – Thomas's rice rat
- Oryzomys gorgasi – Gorgas's rice rat
- Oryzomys nelsoni – Tres marias island rice rat
- Oryzomys palustris – Marsh rice rat
- Oryzomys texensis
- Oryzorictes hova – Mole-like rice tenrec
- Oryzorictes tetradactylus – Four-toed rice tenrec
- Osgoodomys banderanus – Michoacan deer mouse
- Osphranter antilopinus
- Osphranter bernardus
- Osphranter robustus
- Osphranter rufus
- Otaria byronia
- Otocolobus manul – Pallas's cat
- Otocyon megalotis – Bat-eared fox
- Otolemur crassicaudatus – Thick-tailed greater galago
- Otolemur garnettii – Garnett's greater galago
- Otomops formosus – Java giant mastiff bat
- Otomops harrisoni
- Otomops johnstonei – Johnstone's giant mastiff bat
- Otomops madagascariensis – Madagascar free-tailed bat
- Otomops martiensseni – Large-eared free-tailed bat
- Otomops papuensis – Papuan free-tailed bat
- Otomops secundus – Mantled free-tailed bat
- Otomops wroughtoni – Wroughton's free-tailed bat
- Otomys anchietae – Angolan vlei rat
- Otomys angoniensis – Angoni vlei rat
- Otomys auratus
- Otomys barbouri – Barbour's vlei rat
- Otomys burtoni – Burton's vlei rat
- Otomys cheesmani
- Otomys cuanzensis – Cuanza vlei rat
- Otomys dartmouthi
- Otomys denti – Dent's vlei rat
- Otomys dollmani
- Otomys fortior
- Otomys helleri
- Otomys irroratus – Southern african vlei rat
- Otomys jacksoni
- Otomys karoensis
- Otomys lacustris – Tanzanian vlei rat
- Otomys laminatus – Laminate vlei rat
- Otomys occidentalis – Western vlei rat
- Otomys orestes
- Otomys simiensis
- Otomys sloggetti – Sloggett's vlei rat
- Otomys sungae
- Otomys thomasi
- Otomys tropicalis – Tropical vlei rat
- Otomys typus – Typical vlei rat
- V — Multiple Otomys unisulcatus – Karoo bush rat
- Otomys uzungwensis
- Otomys yaldeni
- Otomys zinki
- Otonycteris hemprichii – Desert long-eared bat
- Otonycteris leucophaea
- V — Multiple Otonyctomys hatti – Hatt's vesper mouse
- Otopteropus cartilagonodus – Luzon pygmy fruit bat
- Otospermophilus atricapillus
- Otospermophilus beecheyi – California ground squirrel
- Otospermophilus variegatus – Rock squirrel
- Ototylomys phyllotis – Big-eared climbing rat
- Ourebia ourebi – Oribi
- Ovibos moschatus – Muskox
- Ovis ammon – Argali
- Ovis aries
- Ovis canadensis – Bighorn sheep
- Ovis dalli – Thinhorn sheep
- Ovis nivicola – Snow sheep
- Ovis orientalis – Mouflon
- Ovis vignei
- Oxymycterus amazonicus
- Oxymycterus caparoae
- Oxymycterus dasytrichus
- Oxymycterus delator – Spy hocicudo
- Oxymycterus hiska – Small hocicudo
- Oxymycterus hucucha – Quechuan hocicudo
- Oxymycterus inca – Incan hocicudo
- Oxymycterus josei
- Oxymycterus juliacae
- Oxymycterus nasutus – Long-nosed hocicudo
- Oxymycterus nigrifrons
- Oxymycterus paramensis – Paramo hocicudo
- Oxymycterus quaestor
- Oxymycterus rufus – Red hocicudo
- Oxymycterus wayku
- Ozotoceros bezoarticus – Pampas deer
- Pachyuromys duprasi – Fat-tailed gerbil
- Pagophilus groenlandicus – Harp seal
- Paguma larvata – Masked palm civet
- Palaeopropithecus ingens – Large sloth lemur
- Palawanomys furvus – Palawan mountain rat
- Pan paniscus – Bonobo
- Pan troglodytes – Chimpanzee
- Panolia eldii
- Panthera leo – Lion
- Panthera onca – Jaguar
- Panthera pardus – Leopard
- Panthera tigris – Tiger
- Panthera uncia – Snow leopard
- Pantholops hodgsonii – Chiru
- Papagomys armandvillei – Armandville's papagomys
- Papio anubis – Olive baboon
- Papio cynocephalus – Yellow baboon
- Papio hamadryas – Hamadryas baboon
- Papio kindae
- Papio papio – Guinea baboon
- Papio ursinus – Chacma baboon
- Pappogeomys bulleri – Buller's pocket gopher
- Paracrocidura graueri – Grauer's large-headed shrew
- Paracrocidura maxima – Greater large-headed shrew
- Paracrocidura schoutedeni – Lesser large-headed shrew
- Paracynictis selousi – Selous's mongoose
- Paradipus ctenodactylus – Comb-toed jerboa
- Paradoxurus hermaphroditus – Common palm civet
- Paradoxurus jerdoni – Brown palm civet
- Paradoxurus musanga
- Paradoxurus philippensis
- Paradoxurus zeylonensis – Golden palm civet
- Paraechinus aethiopicus – Desert hedgehog
- Paraechinus hypomelas – Brandt's hedgehog
- Paraechinus micropus – Indian hedgehog
- Paraechinus nudiventris – Madras hedgehog
- Paragalago cocos – Kenya coast galago
- Paragalago granti – Mozambique dwarf galago
- Paragalago orinus – Mountain dwarf galago
- Paragalago rondoensis – Rondo dwarf galago
- Paragalago zanzibaricus – Tanzania coast dwarf galago
- Parahydromys asper – Waterside rat
- Paraleptomys rufilatus – Northern hydromyine
- Paraleptomys wilhelmina – Short-haired hydromyine
- Paramelomys gressitti – Gressitt's paramelomys
- Paramelomys levipes – Papuan lowland paramelomys
- Paramelomys lorentzii – Lorentz's paramelomys
- Paramelomys mollis – Montane soft-furred paramelomys
- Paramelomys moncktoni – Moncton's paramelomys
- Paramelomys naso – Long-nosed paramelomys
- Paramelomys platyops – Common lowland paramelomys
- Paramelomys rubex – Mountain paramelomys
- Paramelomys steini – Stein's paramelomys
- Parantechinus apicalis – Dibbler
- Paranyctimene raptor – Unstriped tube-nosed bat
- Paranyctimene tenax – Steadfast tube-nosed bat
- Parascalops breweri – Hairy-tailed mole
- Parascaptor leucura – White-tailed mole
- Parastrellus hesperus
- Paratriaenops auritus – Grandidier's trident bat
- Paratriaenops furculus – Trouessart's trident bat
- Paratriaenops pauliani
- Paraxerus alexandri – Alexander's bush squirrel
- Paraxerus boehmi – Boehm's bush squirrel
- Paraxerus cepapi – Smith's bush squirrel
- Paraxerus cooperi – Cooper's mountain squirrel
- Paraxerus flavovittis – Striped bush squirrel
- Paraxerus lucifer – Black and red bush squirrel
- Paraxerus ochraceus – Ochre bush squirrel
- Paraxerus palliatus – Red bush squirrel
- Paraxerus poensis – Green bush squirrel
- Paraxerus vexillarius – Svynnerton's bush squirrel
- Paraxerus vincenti – Vincent's bush squirrel
- Pardofelis marmorata – Marbled cat
- Paremballonura atrata
- Paremballonura tiavato
- Parotomys brantsii – Brants's whistling rat
- Parotomys littledalei – Littledale's whistling rat
- Paruromys dominator – Giant sulawesi rat
- Pattonomys carrikeri
- Pattonomys flavidus
- Pattonomys occasius – Bare-tailed armored tree-rat
- Pattonomys punctatus
- Pattonomys semivillosus
- Paucidentomys vermidax
- Paulamys naso – Paula's long-nosed rat
- Paynomys macronyx
- Pecari angulatus
- Pecari crassus
- Pecari tajacu – Collared peccary
- Pectinator spekei – Speke's pectinator
- Pedetes capensis – Spring hare
- Pedetes surdaster – East african spring-hare
- Pekania pennanti
- Pelea capreolus – Grey rhebok
- Pelomys campanae – Bell groove-toothed swamp rat
- Pelomys fallax – Creek groove-toothed swamp rat
- Pelomys hopkinsi – Hopkins's groove-toothed swamp rat
- Pelomys isseli – Issel's groove-toothed swamp rat
- Pelomys minor – Least groove-toothed swamp rat
- Pennatomys nivalis – Nevis rice rat
- Pentalagus furnessi – Amami rabbit
- Penthetor lucasi – Lucas's short-nosed fruit bat
- Peponocephala electra – Melon-headed whale
- Perameles bougainville – Western barred bandicoot
- Perameles eremiana – Desert bandicoot
- Perameles gunnii – Eastern barred bandicoot
- Perameles nasuta – Long-nosed bandicoot
- Perameles pallescens
- Perimyotis subflavus
- Perodicticus edwardsi
- Perodicticus ibeanus
- Perodicticus potto – West african potto
- Perognathus alticola
- Perognathus amplus – Arizona pocket mouse
- Perognathus fasciatus – Olive-backed pocket mouse
- Perognathus flavescens – Plains pocket mouse
- Perognathus flavus – Silky pocket mouse
- Perognathus inornatus – San joaquin pocket mouse
- Perognathus longimembris – Los angeles little pocket mouse
- Perognathus merriami – Great basin pocket mouse
- Perognathus mollipilosus
- Perognathus parvus – Great basin pocket mouse
- Peromyscus attwateri – Texas deermouse
- Peromyscus aztecus – Aztec mouse
- Peromyscus beatae – Orizaba deermouse
- Peromyscus boylii – Brush mouse
- Peromyscus bullatus – Perote deer mouse
- Peromyscus californicus – California mouse
- Peromyscus caniceps – Monserrat island deermouse
- Peromyscus carletoni
- Peromyscus crinitus – Canyon mouse
- Peromyscus dickeyi – Dickey's deermouse
- Peromyscus difficilis – Zacatecan deer mouse
- Peromyscus eremicus – Cactus mouse
- Peromyscus eva – Eva's desert mouse
- Peromyscus fraterculus – Northern baja deermouse
- Peromyscus furvus – Blackish deer mouse
- Peromyscus gardneri
- Peromyscus gossypinus – Key largo cotton mouse
- Peromyscus grandis – Large deer mouse
- Peromyscus gratus – Osgood's mouse
- Peromyscus guardia – Angel island mouse
- Peromyscus guatemalensis – Guatemalan deer mouse
- Peromyscus gymnotis – Naked-eared deer mouse
- Peromyscus hooperi – Hooper's deer mouse
- Peromyscus hylocetes – Transvolcanic deermouse
- Peromyscus interparietalis – San lorenzo deermouse
- Peromyscus keeni – Northwestern deermouse
- Peromyscus kilpatricki
- Peromyscus laceianus
- Peromyscus latirostris
- Peromyscus leucopus – White-footed mouse
- Peromyscus levipes – Nimble-footed deer mouse
- Peromyscus madrensis – Tres marias island mouse
- Peromyscus maniculatus – North american deermouse
- Peromyscus mayensis – Mayan deer mouse
- Peromyscus megalops – Broad-faced deer mouse
- Peromyscus mekisturus – Puebla deer mouse
- Peromyscus melanocarpus – Black-wristed deer mouse
- Peromyscus melanophrys – Plateau deer mouse
- Peromyscus melanotis – Black-eared mouse
- Peromyscus melanurus – Black-tailed deer mouse
- Peromyscus merriami – Mesquite mouse
- Peromyscus mexicanus – Mexican deer mouse
- Peromyscus nasutus – Northern rock mouse
- Peromyscus nicaraguae
- Peromyscus nudipes
- Peromyscus ochraventer – El carrizo deer mouse
- Peromyscus pectoralis – White-ankled mouse
- Peromyscus pembertoni – Pemberton's deer mouse
- Peromyscus perfulvus – Tawny deer mouse
- Peromyscus polionotus – Choctawhatchee beach mouse
- Peromyscus polius – Chihuahuan deer mouse
- Peromyscus pseudocrinitus – Coronados deer mouse
- Peromyscus sagax – Michoacan deer mouse
- Peromyscus salvadorensis
- Peromyscus schmidlyi – Schmidly's deer mouse
- Peromyscus sejugis – Santa cruz mouse
- Peromyscus simulus – Sinaloan deer mouse
- Peromyscus slevini – Catalina deer mouse
- Peromyscus spicilegus – Gleaning deer mouse
- Peromyscus stephani – San esteban deermouse
- Peromyscus stirtoni – Stirton's deer mouse
- Peromyscus tropicalis
- Peromyscus truei – Pinyon mouse
- Peromyscus winkelmanni – Coalcoman deer mouse
- Peromyscus yucatanicus – Yucatan deer mouse
- Peromyscus zarhynchus – Chiapan deer mouse
- Peropteryx kappleri – Greater dog-like bat
- Peropteryx leucoptera – White-winged dog-like bat
- Peropteryx macrotis – Lesser dog-like bat
- Peropteryx pallidoptera
- Peropteryx trinitatis – Trinidad dog-like bat
- Peroryctes broadbenti – Giant bandicoot
- Peroryctes raffrayana – Raffray's bandicoot
- Petaurillus emiliae – Lesser pygmy flying squirrel
- Petaurillus hosei – Hose's pygmy flying squirrel
- Petaurillus kinlochii – Selangor pygmy flying squirrel
- Petaurista albiventer
- Petaurista alborufus – Red and white giant flying squirrel
- Petaurista caniceps
- Petaurista elegans – Spotted giant flying squirrel
- Petaurista grandis
- Petaurista hainana
- Petaurista lena
- Petaurista leucogenys – Japanese giant flying squirrel
- Petaurista magnificus – Hodgson's giant flying squirrel
- Petaurista marica
- Petaurista mechukaensis – Mechuka giant flying squirrel
- Petaurista mishmiensis – Mishmi giant flying squirrel
- Petaurista nobilis – Bhutan giant flying squirrel
- Petaurista petaurista – Red giant flying squirrel
- Petaurista philippensis – Indian giant flying squirrel
- Petaurista siangensis
- Petaurista sybilla
- Petaurista xanthotis – Chinese giant flying squirrel
- Petaurista yunanensis
- Petauroides armillatus
- Petauroides minor
- Petauroides volans – Greater glider
- Petaurus abidi – Northern glider
- Petaurus australis – Yellow-bellied glider
- Petaurus biacensis – Biak glider
- Petaurus breviceps – Sugar glider
- Petaurus gracilis – Mahogany glider
- Petaurus norfolcensis – Squirrel glider
- Petinomys crinitus – Mindanao flying squirrel
- Petinomys fuscocapillus – Travancore flying squirrel
- Petinomys genibarbis – Whiskered flying squirrel
- Petinomys hageni – Hagen's flying squirrel
- Petinomys lugens – Siberut flying squirrel
- Petinomys mindanensis – Mindanao flying squirrel
- Petinomys setosus – Temminck's flying squirrel
- Petinomys vordermanni – Vordermann's flying squirrel
- Petrodromus tetradactylus – Four-toed sengi
- Petrogale assimilis – Allied rock wallaby
- Petrogale brachyotis – Short-eared rock wallaby
- Petrogale burbidgei – Monjon
- Petrogale coenensis – Cape york rock wallaby
- Petrogale concinna – Nabarlek
- Petrogale godmani – Godman's rock wallaby
- Petrogale herberti – Herbert's rock wallaby
- Petrogale inornata – Unadorned rock wallaby
- Petrogale lateralis – Black-footed rock wallaby
- Petrogale mareeba – Mareeba rock wallaby
- Petrogale penicillata – Brush-tailed rock wallaby
- Petrogale persephone – Proserpine rock wallaby
- Petrogale purpureicollis – Purple-necked rock wallaby
- Petrogale rothschildi – Rothschild's rock wallaby
- Petrogale sharmani – Mount claro rock wallaby
- Petrogale wilkinsi
- Petrogale xanthopus – Yellow-footed rock wallaby
- Petromus typicus – Dassie rat
- Petromyscus barbouri – Barbour's rock mouse
- Petromyscus collinus – Pygmy rock mouse
- Petromyscus monticularis – Brukkaros pygmy rock mouse
- Petromyscus shortridgei – Shortridge's rock mouse
- Petropseudes dahli – Rock ringtail possum
- Petrosaltator rozeti
- Phacochoerus aethiopicus – Desert warthog
- Phacochoerus africanus – Common warthog
- Phaenomys ferrugineus – Rio de janeiro arboreal rat
- Phalanger alexandrae – Gebe cuscus
- Phalanger carmelitae – Mountain cuscus
- Phalanger gymnotis – Ground cuscus
- Phalanger intercastellanus – Eastern common cuscus
- Phalanger lullulae – Woodlark cuscus
- Phalanger matabiru – Blue-eyed cuscus
- Phalanger matanim – Telefomin cuscus
- Phalanger mimicus – Southern common cuscus
- Phalanger orientalis – Northern common cuscus
- Phalanger ornatus – Ornate cuscus
- Phalanger pelengensis
- Phalanger rothschildi – Obi cuscus
- Phalanger sericeus – Silky cuscus
- Phalanger vestitus – Stein's cuscus
- Phaner electromontis – Montagne d' ambre fork-marked lemur
- Phaner furcifer – Masoala fork-marked lemur
- Phaner pallescens – Pale fork-marked lemur
- Phaner parienti – Sambirano fork-marked lemur
- Pharotis imogene – Thomas's big-eared bat
- Phascogale calura – Red-tailed phascogale
- Phascogale pirata – Northern brush-tailed phascogale
- Phascogale tapoatafa – Brush-tailed phascogale
- Phascolarctos cinereus – Koala
- Phascolosorex doriae – Red-bellied phascogale
- Phascolosorex dorsalis – Narrow-striped dasyure
- Phataginus tetradactyla – Black-bellied pangolin
- Phataginus tricuspis – White-bellied pangolin
- Phenacomys intermedius – Western heather vole
- Phenacomys ungava – Eastern heather vole
- Philander andersoni – Anderson's four-eyed opossum
- Philander deltae – Deltaic four-eyed opossum
- Philander frenatus – Southeastern four-eyed opossum
- Philander mcilhennyi – Mcilhenny's four-eyed opossum
- Philander mondolfii – Mondolfi's four-eyed opossum
- Philander olrogi – Olrog`s four-eyed opossum
- Philander opossum – Gray four-eyed opossum
- Philantomba maxwellii – Maxwell's duiker
- Philantomba monticola – Blue duiker
- Philantomba walteri – Walter's duiker
- Philetor brachypterus – Short-winged pipistrelle
- Phloeomys cumingi – Southern luzon phloeomys
- Phloeomys pallidus – Northern luzon phloeomys
- Phoca largha – Spotted seal
- Phoca vitulina – Harbor seal
- Phocarctos hookeri – New zealand sea lion
- Phocoena dioptrica – Spectacled porpoise
- Phocoena phocoena – Harbour porpoise
- Phocoena sinus – Vaquita
- Phocoena spinipinnis – Burmeister's porpoise
- Phocoenoides dalli – Dall's porpoise
- Phodopus campbelli – Campbell's hamster
- Phodopus roborovskii – Desert hamster
- Phodopus sungorus – Dzhungarian hamster
- Phoniscus aerosa – Dubious trumpet-eared bat
- Phoniscus atrox – Groove-toothed trumpet-eared bat
- Phoniscus jagorii – Peters's trumpet-eared bat
- Phoniscus papuensis – Golden-tipped bat
- Phylloderma stenops – Pale-faced bat
- Phyllomys blainvilii
- Phyllomys brasiliensis – Red-nosed tree rat
- Phyllomys dasythrix – Drab atlantic tree rat
- Phyllomys kerri
- Phyllomys lamarum – Pallid atlantic tree rat
- Phyllomys lundi
- Phyllomys mantiqueirensis
- Phyllomys medius
- Phyllomys nigrispinus – Black-spined atlantic tree rat
- Phyllomys pattoni
- Phyllomys sulinus – Southern atlantic tree rat
- Phyllomys thomasi – Giant atlantic tree rat
- Phyllomys unicolor – Unicolored tree rat
- Phyllonycteris aphylla – Jamaican flower bat
- Phyllonycteris poeyi – Cuban flower bat
- Phyllops falcatus – Cuban fig-eating bat
- Phyllostomus discolor – Pale spear-nosed bat
- Phyllostomus elongatus – Lesser spear-nosed bat
- Phyllostomus hastatus – Greater spear-nosed bat
- Phyllostomus latifolius – Guianan spear-nosed bat
- Phyllotis alisosiensis
- Phyllotis amicus – Friendly leaf-eared mouse
- Phyllotis andium – Andean leaf-eared mouse
- Phyllotis anitae
- Phyllotis bonariensis – Buenos aires leaf-eared mouse
- Phyllotis caprinus – Capricorn leaf-eared mouse
- Phyllotis darwini – Darwin's leaf-eared mouse
- Phyllotis definitus – Definitive leaf-eared mouse
- Phyllotis gerbillus
- Phyllotis haggardi – Haggard's leaf-eared mouse
- Phyllotis limatus
- Phyllotis magister – Master leaf-eared mouse
- Phyllotis nogalaris
- Phyllotis occidens
- Phyllotis osgoodi – Osgood's leaf-eared mouse
- Phyllotis osilae – Bunchgrass leaf-eared mouse
- Phyllotis pearsoni
- Phyllotis stenops
- Phyllotis xanthopygus – Yellow-rumped leaf-eared mouse
- Physeter macrocephalus – Sperm whale
- Piliocolobus badius
- Piliocolobus bouvieri
- Piliocolobus epieni
- Piliocolobus foai
- Piliocolobus gordonorum
- Piliocolobus kirkii
- Piliocolobus langi
- Piliocolobus oustaleti
- Piliocolobus parmentieri
- Piliocolobus pennantii
- Piliocolobus preussi
- Piliocolobus rufomitratus
- Piliocolobus semlikiensis
- Piliocolobus temminckii
- Piliocolobus tephrosceles
- Piliocolobus tholloni
- Piliocolobus waldronae
- Pipanacoctomys aureus
- Pipistrellus abramus – Japanese pipistrelle
- Pipistrellus adamsi – Forest pipistrelle
- Pipistrellus aero – Mount gargues pipistrelle
- Pipistrellus angulatus – New guinea pipistrelle
- Pipistrellus ceylonicus – Kelaart's pipistrelle
- Pipistrellus collinus – Mountain pipistrelle
- Pipistrellus coromandra – Coromandel pipistrelle
- Pipistrellus dhofarensis
- Pipistrellus endoi – Endo's pipistrelle
- Pipistrellus hanaki – Hanaki's dwarf bat
- Pipistrellus inexspectatus – Aellen's pipistrelle
- Pipistrellus javanicus – Javan pipistrelle
- Pipistrellus kuhlii – Kuhl's pipistrelle
- Pipistrellus maderensis – Madeira pipistrelle
- Pipistrellus minahassae – Minahassa pipistrelle
- Pipistrellus murrayi – Christmas island pipistrelle
- Pipistrellus nanulus – Tiny pipistrelle
- Pipistrellus nathusii – Nathusius' pipistrelle
- Pipistrellus papuanus – Papuan pipistrelle
- Pipistrellus paterculus – Mount popa pipistrelle
- Pipistrellus permixtus – Dar-es-salaam pipistrelle
- Pipistrellus pipistrellus – Common pipistrelle
- Pipistrellus pygmaeus – Soprano pipistrelle
- Pipistrellus raceyi – Racey's pipistrelle bat
- Pipistrellus rueppellii – Rüppel's pipistrelle
- Pipistrellus rusticus – Rusty pipistrelle bat
- Pipistrellus stenopterus – Narrow-winged pipistrelle
- Pipistrellus sturdeei – Sturdee's pipistrelle
- Pipistrellus tenuis – Least pipistrelle
- Pipistrellus wattsi – Watts's pipistrelle
- Pipistrellus westralis – Northern pipistrelle
- Pithecheir melanurus – Javan pithecheir
- Pithecheir parvus – Malay peninsula pithecheir
- Pithecheirops otion – Bornean pithecheirops
- Pithecia aequatorialis – Equatorial saki
- Pithecia albicans – Buffy saki
- Pithecia cazuzai
- Pithecia chrysocephala – Golden-faced saki
- Pithecia hirsuta
- Pithecia inusta
- Pithecia irrorata
- Pithecia isabela
- Pithecia milleri – Miller's saki
- Pithecia mittermeieri
- Pithecia monachus
- Pithecia napensis
- Pithecia pissinattii
- Pithecia pithecia – White-faced saki
- Pithecia rylandsi
- Pithecia vanzolinii – Vanzolini's bald-faced saki
- Plagiodontia aedium – Hispaniolan hutia
- Plagiodontia ipnaeum – Samana hutia
- Planigale gilesi – Giles' planigale
- Planigale ingrami – Long-tailed planigale
- Planigale maculata – Common planigale
- Planigale novaeguineae – Papuan planigale
- Planigale tenuirostris – Narrow-nosed planigale
- Platacanthomys lasiurus – Malabar spiny tree mouse
- Platalina genovensium – Long-snouted bat
- Platanista gangetica – Ganges river dolphin
- Platymops setiger – Peters's flat-headed bat
- Platyrrhinus albericoi
- Platyrrhinus angustirostris
- Platyrrhinus aquilius
- Platyrrhinus aurarius – Eldorado broad-nosed bat
- Platyrrhinus brachycephalus – Short-headed broad-nosed bat
- Platyrrhinus chocoensis – Choco broad-nosed bat
- Platyrrhinus dorsalis – Thomas's broad-nosed bat
- Platyrrhinus fusciventris
- Platyrrhinus guianensis
- Platyrrhinus helleri – Heller's broad-nosed bat
- Platyrrhinus incarum
- Platyrrhinus infuscus – Buffy broad-nosed bat
- Platyrrhinus ismaeli
- Platyrrhinus lineatus – White-lined broad-nosed bat
- Platyrrhinus masu
- Platyrrhinus matapalensis
- Platyrrhinus nigellus
- Platyrrhinus nitelinea – Western broad-nosed bat
- Platyrrhinus recifinus – Recife broad-nosed bat
- Platyrrhinus umbratus – Shadowy broad-nosed bat
- Platyrrhinus vittatus – Greater broad-nosed bat
- Plecotus ariel
- Plecotus auritus – Brown big-eared bat
- Plecotus austriacus – Gray big-eared bat
- Plecotus balensis – Ethiopian big-eared bat
- Plecotus begognae
- Plecotus christii
- Plecotus gaisleri
- Plecotus homochrous
- Plecotus kolombatovici – Mediterranean long-eared bat
- Plecotus kozlovi
- Plecotus macrobullaris – Mountain long-eared bat
- Plecotus ognevi
- Plecotus sacrimontis
- Plecotus sardus – Sardinian long-eared bat
- Plecotus strelkovi
- Plecotus taivanus – Taiwan long-eared bat
- Plecotus teneriffae – Canary big-eared bat
- Plecotus turkmenicus
- Plecotus wardi
- Plecturocebus aureipalatii
- Plecturocebus baptista
- Plecturocebus bernhardi
- Plecturocebus brunneus
- Plecturocebus caligatus
- Plecturocebus caquetensis
- Plecturocebus cinerascens
- Plecturocebus cupreus
- Plecturocebus discolor
- Plecturocebus donacophilus
- Plecturocebus hoffmannsi
- Plecturocebus miltoni
- Plecturocebus modestus
- Plecturocebus moloch
- Plecturocebus oenanthe
- Plecturocebus olallae
- Plecturocebus ornatus
- Plecturocebus pallescens
- Plecturocebus stephennashi
- Plecturocebus toppini
- Plecturocebus urubambensis
- Plecturocebus vieirai
- Plerotes anchietae – D'anchieta's fruit bat
- Podogymnura aureospinula – Dinagat gymnure
- Podogymnura truei – Mindanao gymnure
- Podomys floridanus – Florida deermouse
- Podoxymys roraimae – Roraima mouse
- Poecilogale albinucha – African striped weasel
- Poelagus marjorita – Bunyoro rabbit
- Pogonomelomys brassi – Grey pogonomelomys
- Pogonomelomys bruijni
- Pogonomelomys mayeri – Shaw mayer's pogonomelomys
- Pogonomys championi – Champion's tree mouse
- Pogonomys fergussoniensis – D'entrecasteaux archipelago pogonomys
- Pogonomys loriae – Loria's pogonomys
- Pogonomys macrourus – Chestnut tree mouse
- Pogonomys mollipilosus
- Pogonomys sylvestris – Gray-bellied tree mouse
- Poiana leightoni – West african oyan
- Poiana richardsonii – Central african oyan
- Poliocitellus franklinii – Franklin's ground squirrel
- Pongo abelii – Sumatran orangutan
- Pongo pygmaeus – Bornean orangutan
- Pontoporia blainvillei – Franciscana
- Porcula salvania – Pygmy hog
- Potamochoerus larvatus – Bushpig
- Potamochoerus porcus – Red river hog
- Potamogale velox – Giant otter shrew
- Potorous gilbertii – Gilbert's potoroo
- Potorous longipes – Long-footed potoroo
- Potorous platyops – Broad-faced potoroo
- Potorous tridactylus – Long-nosed potoroo
- Potos flavus – Kinkajou
- Praomys coetzeei
- Praomys daltoni – Dalton's praomys
- Praomys degraaffi – De graaff's praomys
- Praomys delectorum – East african praomys
- Praomys hartwigi – Hartwig's soft-furred mouse
- Praomys jacksoni – Jackson's soft-furred mouse
- Praomys lukolelae – Lukolela swamp rat
- Praomys minor – Least soft-furred mouse
- Praomys misonnei – Misonne's soft-furred mouse
- Praomys morio – Cameroon soft-furred mouse
- Praomys mutoni – Riverine soft-furred mouse
- Praomys obscurus
- Praomys petteri – Petter's praomys
- Praomys rostratus – Forest soft-furred mouse
- Praomys tullbergi – Tullberg's soft-furred mouse
- Praomys verschureni – Verschuren's soft-furred mouse
- Presbytis bicolor
- Presbytis canicrus
- Presbytis chrysomelas – Bornean banded langur
- Presbytis comata – Javan surili
- Presbytis femoralis – Banded surili
- Presbytis frontata – White-fronted langur
- Presbytis hosei – Hose's langur
- Presbytis melalophos – Sumatran surili
- Presbytis mitrata
- Presbytis natunae – Natuna island surili
- Presbytis potenziani – Mentawai langur
- Presbytis rubicunda – Maroon leaf monkey
- Presbytis sabana
- Presbytis siamensis – White-thighed surili
- Presbytis siberu
- Presbytis sumatrana
- Presbytis thomasi – Thomas's langur
- Priodontes maximus – Giant armadillo
- Prionailurus bengalensis – Leopard cat
- Prionailurus javanensis
- Prionailurus planiceps – Flat-headed cat
- Prionailurus rubiginosus – Rusty-spotted cat
- Prionailurus viverrinus – Fishing cat
- Prionodon linsang – Banded linsang
- Prionodon pardicolor – Spotted linsang
- Prionomys batesi – Dollman's tree mouse
- Procapra gutturosa – Mongolian gazelle
- Procapra picticaudata – Tibetan gazelle
- Procapra przewalskii – Przewalski's gazelle
- Procavia capensis – Rock hyrax
- Procolobus verus – Olive colobus
- Procyon cancrivorus – Crab-eating raccoon
- Procyon lotor – Northern raccoon
- Procyon pygmaeus – Pygmy raccoon
- Proechimys brevicauda – Huallaga spiny rat
- Proechimys canicollis – Colombian spiny rat
- Proechimys chrysaeolus – Boyaca spiny rat
- Proechimys cuvieri – Cuvier's spiny rat
- Proechimys decumanus – Pacific spiny rat
- Proechimys echinothrix
- Proechimys gardneri
- Proechimys goeldii – Goeldi's spiny rat
- Proechimys guairae – Guaira spiny rat
- Proechimys guyannensis – Cayenne spiny rat
- Proechimys hoplomyoides – Guyanan spiny rat
- Proechimys kulinae
- Proechimys longicaudatus – Long-tailed spiny rat
- Proechimys mincae – Minca spiny rat
- Proechimys oconnelli – O'connell's spiny rat
- Proechimys pattoni
- Proechimys quadruplicatus – Napo spiny rat
- Proechimys roberti – Roberto's spiny rat
- Proechimys semispinosus – Tome's spiny rat
- Proechimys simonsi – Simon's spiny rat
- Proechimys steerei – Steere's spiny rat
- Proechimys trinitatus
- Proedromys bedfordi – Duke of bedford's vole
- Proedromys liangshanensis – Liangshan vole
- Prolagus sardus – Sardinian pika
- Prolemur simus – Greater bamboo lemur
- Prometheomys schaposchnikowi – Long-clawed mole vole
- Promops centralis – Big crested mastiff bat
- Promops davisoni
- Promops nasutus – Brown mastiff bat
- Pronolagus crassicaudatus – Natal red rock hare
- Pronolagus randensis – Jameson's red rock hare
- Pronolagus rupestris – Smith's red rock hare
- Pronolagus saundersiae – Hewitt's red rock hare
- Propithecus candidus – Silky sifaka
- Propithecus coquereli – Coquerel's sifaka
- Propithecus coronatus – Crowned sifaka
- Propithecus deckenii – Van der decken's sifaka
- Propithecus diadema – Diademed sifaka
- Propithecus edwardsi – Milne-edward's sifaka
- Propithecus perrieri – Perrier's sifaka
- Propithecus tattersalli – Golden-crowned sifaka
- Propithecus verreauxi – Verreaux's sifaka
- Prosciurillus abstrusus – Secretive dwarf squirrel
- Prosciurillus alstoni
- Prosciurillus leucomus – Whitish dwarf squirrel
- Prosciurillus murinus – Celebes dwarf squirrel
- Prosciurillus rosenbergii – Sanghir squirrel
- Prosciurillus topapuensis
- Prosciurillus weberi – Weber's dwarf squirrel
- Proteles cristata – Aardwolf
- Protochromys fellowsi – Red-bellied protochromys
- Protoxerus aubinnii – Slender-tailed squirrel
- Protoxerus stangeri – African giant squirrel
- Psammomys obesus – Fat sand rat
- Psammomys vexillaris – Lesser sand rat
- Pseudantechinus bilarni – Sandstone antechinus
- Pseudantechinus macdonnellensis – Fat-tailed pseudantechinus
- Pseudantechinus mimulus – Carpentarian antechinus
- Pseudantechinus ningbing – Ningbing pseudantechinus
- Pseudantechinus roryi – Rory's pseudantechinus
- Pseudantechinus woolleyae – Woolley's pseudantechinus
- Pseudocheirus occidentalis – Western ringtail possum
- Pseudocheirus peregrinus – Common ringtail possum
- Pseudochirops albertisii – D'albertis's ringtail
- Pseudochirops archeri – Green ringtail possum
- Pseudochirops corinnae – Plush-coated ringtail
- Pseudochirops coronatus – Reclusive ringtail
- Pseudochirops cupreus – Coppery ringtail
- Pseudochirulus canescens – Lowland ringtail
- Pseudochirulus caroli – Weyland ringtail
- Pseudochirulus cinereus – Daintree river ringtail possum
- Pseudochirulus forbesi – Painted ringtail
- Pseudochirulus herbertensis – Herbert river ringtail possum
- Pseudochirulus larvatus – Masked ringtail
- Pseudochirulus mayeri – Pygmy ringtail
- Pseudochirulus schlegeli – Arfak ringtail
- Pseudohydromys berniceae – Bishop's moss-mouse
- Pseudohydromys carlae
- Pseudohydromys eleanorae
- Pseudohydromys ellermani – One-toothed shrew mouse
- Pseudohydromys fuscus – Mottled-tailed shrew mouse
- Pseudohydromys germani – German's one-toothed moss mouse
- Pseudohydromys murinus
- Pseudohydromys musseri – Musser's shrew mouse
- Pseudohydromys occidentalis – Western shrew mouse
- Pseudohydromys patriciae – Woolley's moss-mouse
- Pseudohydromys pumehanae
- Pseudohydromys sandrae – White-bellied moss-mouse
- Pseudois nayaur – Blue sheep
- Pseudomys albocinereus – Ash-grey mouse
- Pseudomys apodemoides – Silky mouse
- Pseudomys auritus
- Pseudomys australis – Plains mouse
- Pseudomys bolami – Bolam's mouse
- Pseudomys calabyi – Kakadu pebble mouse
- Pseudomys chapmani – Western pebble mouse
- Pseudomys delicatulus – Delicate mouse
- Pseudomys desertor – Desert mouse
- Pseudomys fieldi – Djoongari
- Pseudomys fumeus – Smoky mouse
- Pseudomys glaucus – Blue-grey mouse
- Pseudomys gouldii – Gould's mouse
- Pseudomys gracilicaudatus – Eastern chestnut mouse
- Pseudomys hermannsburgensis – Sandy inland mouse
- Pseudomys higginsi – Long-tailed mouse
- Pseudomys johnsoni – Central pebble mouse
- Pseudomys nanus – Western chestnut mouse
- Pseudomys novaehollandiae – New holland mouse
- Pseudomys occidentalis – Western mouse
- Pseudomys oralis – Hastings river mouse
- Pseudomys patrius – Eastern pebble mouse
- Pseudomys shortridgei – Heath mouse
- Pseudorca crassidens – False killer whale
- Pseudoryx nghetinhensis – Saola
- Pseudoryzomys simplex – Brazilian false rice rat
- Ptenochirus jagori – Greater musky fruit bat
- Ptenochirus minor – Lesser musky fruit bat
- Pteralopex anceps – Bougainville monkey-faced bat
- Pteralopex atrata – Guadalcanal monkey-faced bat
- Pteralopex flanneryi – Greater monkey-faced bat
- Pteralopex pulchra – Montane monkey-faced bat
- Pteralopex taki – New georgia monkey-faced bat
- Pteromys momonga – Japanese flying squirrel
- Pteromys volans – Siberian flying squirrel
- Pteromyscus pulverulentus – Smoky flying squirrel
- Pteronotus davyi – Davy's naked-backed bat
- Pteronotus fulvus
- Pteronotus fuscus
- Pteronotus gymnonotus – Big naked-backed bat
- Pteronotus macleayii – Macleay's mustached bat
- Pteronotus mesoamericanus
- Pteronotus mexicanus
- Pteronotus paraguanensis
- Pteronotus parnellii – Common mustached bat
- Pteronotus personatus – Wagner's mustached bat
- Pteronotus portoricensis
- Pteronotus psilotis
- Pteronotus pusillus
- Pteronotus quadridens – Sooty mustached bat
- Pteronotus rubiginosus
- Pteronura brasiliensis – Giant otter
- Pteropus admiralitatum – Admiralty flying fox
- Pteropus aldabrensis – Aldabra flying-fox
- Pteropus alecto – Black flying fox
- Pteropus allenorum
- Pteropus anetianus – Vanauatu flying fox
- Pteropus argentatus
- Pteropus aruensis – Aru flying fox
- Pteropus brunneus – Percy island flying fox
- Pteropus caniceps – North moluccan flying fox
- Pteropus capistratus – Bismarck flying fox
- Pteropus chrysoproctus – Moluccan flying fox
- Pteropus cognatus – Makira flying fox
- Pteropus conspicillatus – Spectacled flying fox
- Pteropus coxi
- Pteropus dasymallus – Ryukyu flying fox
- Pteropus ennisae
- Pteropus faunulus – Nicobar flying fox
- Pteropus fundatus – Banks flying fox
- Pteropus gilliardorum – Gilliard's flying fox
- Pteropus griseus – Gray flying fox
- Pteropus howensis – Ontong java flying fox
- Pteropus hypomelanus – Island flying fox
- Pteropus keyensis – Kei flying fox
- Pteropus livingstonii – Livingstone's flying fox
- Pteropus lombocensis – Lombok flying fox
- Pteropus lylei – Lyle's flying fox
- Pteropus macrotis – Large-eared flying fox
- Pteropus mahaganus – Sanborn's flying fox
- Pteropus mariannus – Marianas flying fox
- Pteropus medius
- Pteropus melanopogon – Black-bearded flying fox
- Pteropus melanotus – Blyth's flying fox
- Pteropus molossinus – Pohnpei flying fox
- Pteropus neohibernicus – Great flying fox
- Pteropus niger – Greater mascarene flying fox
- Pteropus nitendiensis – Temotu flying fox
- Pteropus ocularis – Seram flying fox
- Pteropus ornatus – Ornate flying fox
- Pteropus pelagicus
- Pteropus pelewensis – Palau flying fox
- Pteropus personatus – Moluccan masked flying fox
- Pteropus pilosus – Large palau flying fox
- Pteropus pohlei – Geelvink bay flying fox
- Pteropus poliocephalus – Grey-headed flying fox
- Pteropus pselaphon – Bonin flying fox
- Pteropus pumilus – Little golden-mantled flying fox
- Pteropus rayneri – Solomons flying fox
- Pteropus rennelli – Rennell flying fox
- Pteropus rodricensis – Rodrigues flying fox
- Pteropus rufus – Madagascan flying fox
- Pteropus samoensis – Samoan flying fox
- Pteropus scapulatus – Little red flying fox
- Pteropus seychellensis – Seychelles flying fox
- Pteropus speciosus – Philippine gray flying fox
- Pteropus subniger – Lesser mascarene flying-fox
- Pteropus temminckii – Temminck's flying fox
- Pteropus tokudae – Guam flying fox
- Pteropus tonganus – Pacific flying fox
- Pteropus tuberculatus – Vanikoro flying fox
- Pteropus ualanus – Kosrae flying fox
- Pteropus vampyrus – Large flying-fox
- Pteropus vetulus – New caledonia flying fox
- Pteropus voeltzkowi – Pemba flying fox
- Pteropus woodfordi – Dwarf flying fox
- Ptilocercus lowii – Pen-tailed treeshrew
- Pudu mephistophiles – Northern pudu
- Pudu puda – Southern pudu
- Puma concolor – Puma
- Punomys kofordi
- Punomys lemminus – Puna mouse
- Pusa caspica – Caspian seal
- Pusa hispida – Ringed seal
- Pusa sibirica – Baikal seal
- Pygathrix cinerea – Grey-shanked douc langur
- Pygathrix nemaeus – Red-shanked douc langur
- Pygathrix nigripes – Black-shanked douc langur
- Pygeretmus platyurus – Lesser fat-tailed jerboa
- Pygeretmus pumilio – Dwarf fat-tailed jerboa
- Pygeretmus shitkovi
- Pygoderma bilabiatum – Ipanema broad-nosed bat
- Rangifer tarandus – Reindeer
- Raphicerus campestris – Steenbok
- Raphicerus melanotis – Cape grysbok
- Raphicerus sharpei – Sharpe's grysbok
- Rattus adustus – Burnished enggano rat
- Rattus andamanensis – Indochinese forest rat
- Rattus arfakiensis
- Rattus argentiventer – Ricefield rat
- Rattus arrogans – Western new guinea mountain rat
- Rattus baluensis – Kinabalu rat
- Rattus blangorum – Aceh rat
- Rattus bontanus – Southwestern xanthurus rat
- Rattus burrus – Miller's nicobar rat
- Rattus colletti – Dusky rat
- Rattus detentus
- Rattus elaphinus – Sula archipelago rat
- Rattus enganus – Enggano island rat
- Rattus everetti – Philippine forest rat
- Rattus exulans – Polynesian rat
- Rattus feliceus – Spiny seram island rat
- Rattus fuscipes – Bush rat
- Rattus giluwensis – Giluwe rat
- Rattus hainaldi – Hainald's flores island rat
- Rattus hoffmanni – Hoffmann's sulawesi rat
- Rattus hoogerwerfi – Hoogerwerf's sumatran rat
- Rattus jobiensis – Yapen rat
- Rattus koopmani – Koopman's peleng island rat
- Rattus korinchi – Sumatran mountain rat
- Rattus leucopus – Cape york rat
- Rattus losea – Losea rat
- Rattus lugens – Mentawai archipelago rat
- Rattus lutreolus – Australian swamp rat
- Rattus macleari – Maclear's rat
- Rattus marmosurus – Marmoset xanthurus rat
- Rattus mindorensis – Mindoro mountain rat
- Rattus mollicomulus – Lompobatang sulawesi rat
- Rattus montanus – Sri lankan mountain rat
- Rattus mordax – Eastern rat
- Rattus morotaiensis – Halmahara rat
- Rattus nativitatis – Bulldog rat
- Rattus nikenii – Niken's rat
- Rattus niobe – Moss-forest rat
- Rattus nitidus – Himalayan field rat
- Rattus norvegicus – Brown rat
- Rattus novaeguineae – New guinea rat
- Rattus omichlodes – Arianus's rat
- Rattus osgoodi – Osgood's vietnamese rat
- Rattus palmarum – Zelebor's nicobar rat
- Rattus pelurus – Peleng island xanthurus rat
- Rattus pococki – Pocock's highland rat
- Rattus praetor – Large spiny rat
- Rattus pyctoris – Himalayan rat
- Rattus ranjiniae – Ranjini's field rat
- Rattus rattus – House rat
- Rattus richardsoni – Glacier rat
- Rattus salocco – Southeastern xanthurus rat
- Rattus sanila
- Rattus satarae – Sahyadris forest rat
- Rattus simalurensis – Simalur archipelago rat
- Rattus sordidus – Canefield rat
- Rattus steini – Small spiny rat
- Rattus stoicus – Andaman rat
- Rattus tanezumi – Oriental house rat
- Rattus tawitawiensis – Tawitawi forest rat
- Rattus timorensis – Timor forest rat
- Rattus tiomanicus – Malaysian field rat
- Rattus tunneyi – Pale field rat
- Rattus vandeuseni – Van deusen's rat
- Rattus verecundus – Slender rat
- Rattus villosissimus – Long-haired rat
- Rattus xanthurus – Northeastern xanthurus rat
- Ratufa affinis – Pale giant squirrel
- Ratufa bicolor – Black giant squirrel
- Ratufa indica – Indian giant squirrel
- Ratufa macroura – Sri lankan giant squirrel
- Redunca arundinum – Southern reedbuck
- Redunca fulvorufula – Mountain reedbuck
- Redunca redunca – Bohor reedbuck
- Reithrodon auritus – Bunny rat
- Reithrodon typicus
- Reithrodontomys bakeri – Baker's small-toothed harvest mouse
- Reithrodontomys brevirostris – Short-nosed harvest mouse
- Reithrodontomys burti – Sonoran harvest mouse
- Reithrodontomys cherrii
- Reithrodontomys chrysopsis – Volcano harvest mouse
- Reithrodontomys creper – Chiriqui harvest mouse
- Reithrodontomys darienensis – Darien harvest mouse
- Reithrodontomys fulvescens – Fulvous harvest mouse
- Reithrodontomys garichensis
- Reithrodontomys gracilis – Slender harvest mouse
- Reithrodontomys hirsutus – Hairy harvest mouse
- Reithrodontomys humulis – Eastern harvest mouse
- Reithrodontomys megalotis – Southern marsh harvest mouse
- Reithrodontomys mexicanus – Mexican harvest mouse
- Reithrodontomys microdon – Small-toothed harvest mouse
- Reithrodontomys montanus – Plains harvest mouse
- Reithrodontomys musseri
- Reithrodontomys paradoxus – Nicaraguan harvest mouse
- Reithrodontomys raviventris – Salt-marsh harvest mouse
- Reithrodontomys rodriguezi – Rodriguez's harvest mouse
- Reithrodontomys spectabilis – Cozumel harvest mouse
- Reithrodontomys sumichrasti – Sumichrast's harvest mouse
- Reithrodontomys tenuirostris – Narrow-nosed harvest mouse
- Reithrodontomys zacatecae – Zacatecas harvest mouse
- Rhabdomys bechuanae
- Rhabdomys dilectus
- Rhabdomys intermedius
- Rhabdomys pumilio – Four-striped grass mouse
- Rhagomys longilingua
- Rhagomys rufescens – Brazilian arboreal mouse
- Rheithrosciurus macrotis – Tufted ground squirrel
- Rheomys mexicanus – Mexican water mouse
- Rheomys raptor – Goldman's water mouse
- Rheomys thomasi – Thomas's water mouse
- Rheomys underwoodi – Underwood's water mouse
- Rhinoceros sondaicus – Javan rhinoceros
- Rhinoceros unicornis – Indian rhinoceros
- Rhinolophus acuminatus – Accuminate horseshoe bat
- Rhinolophus adami – Adam's horseshoe bat
- Rhinolophus affinis – Intermediate horseshoe bat
- Rhinolophus alcyone – Halcyon horseshoe bat
- Rhinolophus arcuatus – Arcuate horseshoe bat
- Rhinolophus beddomei – Beddome's horseshoe bat
- Rhinolophus belligerator
- Rhinolophus blasii – Blasius's horseshoe bat
- Rhinolophus bocharicus – Bokhara horseshoe bat
- Rhinolophus borneensis – Bornean horseshoe bat
- Rhinolophus canuti – Canut's horseshoe bat
- Rhinolophus capensis – Cape horseshoe bat
- Rhinolophus celebensis – Sulawesi horseshoe bat
- Rhinolophus chaseni
- Rhinolophus chiewkweeae
- Rhinolophus clivosus – Geoffroy's horseshoe bat
- Rhinolophus coelophyllus – Croslet horseshoe bat
- Rhinolophus cognatus – Andaman horseshoe bat
- Rhinolophus cohenae
- Rhinolophus convexus – Convex horseshoe bat
- Rhinolophus cornutus
- Rhinolophus creaghi – Creagh's horseshoe bat
- Rhinolophus damarensis
- Rhinolophus darlingi – Darling's horseshoe bat
- Rhinolophus deckenii – Decken's horseshoe bat
- Rhinolophus denti – Dent's horseshoe bat
- Rhinolophus eloquens – Eloquent horseshoe bat
- Rhinolophus euryale – Mediterranean horseshoe bat
- Rhinolophus euryotis – New guinea horseshoe bat
- Rhinolophus ferrumequinum – Greater horseshoe bat
- Rhinolophus formosae – Formosan woolly horseshoe bat
- Rhinolophus francisi
- Rhinolophus fumigatus – Rüppell's horseshoe bat
- Rhinolophus guineensis – Guinean horseshoe bat
- Rhinolophus hildebrandtii – Hildebrandt's horseshoe bat
- Rhinolophus hilli – Hill's horseshoe bat
- Rhinolophus hillorum – Upland horseshoe bat
- Rhinolophus hipposideros – Lesser horseshoe bat
- Rhinolophus horaceki
- Rhinolophus huananus
- Rhinolophus imaizumii
- Rhinolophus inops – Philippine forest horseshoe bat
- Rhinolophus kahuzi
- Rhinolophus keyensis – Kai horseshoe bat
- Rhinolophus landeri – Lander's horseshoe bat
- Rhinolophus lanosus
- Rhinolophus lepidus – Blyth's horseshoe bat
- Rhinolophus luctoides
- Rhinolophus luctus – Great woolly horsehoe bat
- Rhinolophus mabuensis
- Rhinolophus maclaudi – Maclaud's horseshoe bat
- Rhinolophus macrotis – Big-eared horseshoe bat
- Rhinolophus madurensis – Madura horseshoe bat
- Rhinolophus maendeleo – Maendeleo horseshoe bat
- Rhinolophus malayanus – Malayan horseshoe bat
- Rhinolophus marshalli – Marshall's horseshoe bat
- Rhinolophus mcintyrei
- Rhinolophus megaphyllus – Eastern horseshoe bat
- Rhinolophus mehelyi – Mehely's horseshoe bat
- Rhinolophus microglobosus
- Rhinolophus mitratus – Mitred horseshoe bat
- Rhinolophus monoceros
- Rhinolophus montanus – Timorese horseshoe bat
- Rhinolophus monticolus
- Rhinolophus morio
- Rhinolophus mossambicus
- Rhinolophus nereis – Anamban horseshoe bat
- Rhinolophus osgoodi – Osgood's horseshoe bat
- Rhinolophus paradoxolophus – Bourret's horseshoe bat
- Rhinolophus pearsonii – Pearson's horseshoe bat
- Rhinolophus perditus
- Rhinolophus philippinensis – Large-eared horseshoe bat
- Rhinolophus proconsulis
- Rhinolophus pusillus – Least horseshoe bat
- Rhinolophus refulgens
- Rhinolophus rex – King horseshoe bat
- Rhinolophus robinsoni – Peninsular horseshoe bat
- Rhinolophus rouxii – Rufous horseshoe bat
- Rhinolophus rufus – Large rufous horseshoe bat
- Rhinolophus ruwenzorii – Ruwenzori horseshoe bat
- Rhinolophus sakejiensis – Sakeji horseshoe bat
- Rhinolophus schnitzleri
- Rhinolophus sedulus – Lesser wooly horseshoe bat
- Rhinolophus shameli – Shamel's horseshoe bat
- Rhinolophus shortridgei – Shortridge's horseshoe bat
- Rhinolophus siamensis – Thai horseshoe bat
- Rhinolophus silvestris – Forest horseshoe bat
- Rhinolophus simulator – Bushveld horseshoe bat
- Rhinolophus sinicus – Chinese horseshoe bat
- Rhinolophus smithersi
- Rhinolophus stheno – Lesser brown horseshoe bat
- Rhinolophus subbadius – Little nepalese horseshoe bat
- Rhinolophus subrufus – Small rufous horseshoe bat
- Rhinolophus swinnyi – Swinny's horseshoe bat
- Rhinolophus tatar
- Rhinolophus thailandensis
- Rhinolophus thomasi – Thomas's horseshoe bat
- Rhinolophus trifoliatus – Trefoil horseshoe bat
- Rhinolophus virgo – Yellow-faced horseshoe bat
- Rhinolophus willardi
- Rhinolophus xinanzhongguoensis
- Rhinolophus yunanensis – Dobson's horseshoe bat
- Rhinolophus ziama – Ziama horseshoe bat
- Rhinonicteris aurantia – Orange leaf-nosed bat
- Rhinophylla alethina – Hairy little fruit bat
- Rhinophylla fischerae – Fischer's little fruit bat
- Rhinophylla pumilio – Dwarf little fruit bat
- Rhinopithecus avunculus – Tonkin snub-nosed monkey
- Rhinopithecus bieti – Black snub-nosed monkey
- Rhinopithecus brelichi – Grey snub-nosed monkey
- Rhinopithecus roxellana – Golden snub-nosed monkey
- Rhinopithecus strykeri – Myanmar snub-nosed monkey
- Rhinopoma cystops
- Rhinopoma hadramauticum
- Rhinopoma hardwickii – Lesser mouse-tailed bat
- Rhinopoma macinnesi – Macinnes's mouse-tailed bat
- Rhinopoma microphyllum – Greater mouse-tailed bat
- Rhinopoma muscatellum – Small mouse-tailed bat
- Rhinosciurus laticaudatus – Shrew-faced squirrel
- Rhipidomys albujai
- Rhipidomys austrinus – Southern climbing mouse
- Rhipidomys cariri
- Rhipidomys caucensis – Cauca climbing mouse
- Rhipidomys couesi – Coues's climbing mouse
- Rhipidomys emiliae
- Rhipidomys fulviventer – Buff-bellied climbing mouse
- Rhipidomys gardneri
- Rhipidomys ipukensis
- Rhipidomys itoan
- Rhipidomys latimanus – Broad-footed climbing mouse
- Rhipidomys leucodactylus – White-footed climbing mouse
- Rhipidomys macconnelli – Macconnell's climbing mouse
- Rhipidomys macrurus
- Rhipidomys mastacalis – Long-tailed climbing mouse
- Rhipidomys modicus – Peruvian rhipidomys
- Rhipidomys nitela – Splendid climbing mouse
- Rhipidomys ochrogaster – Yellow-bellied climbing mouse
- Rhipidomys similis
- Rhipidomys tenuicauda
- Rhipidomys tribei
- Rhipidomys venezuelae – Venezuelan climbing mouse
- Rhipidomys venustus – Charming climbing mouse
- Rhipidomys wetzeli – Wetzel's climbing mouse
- Rhizomys pruinosus – Hoary bamboo rat
- Rhizomys sinensis – Chinese bamboo rat
- Rhizomys sumatrensis – Indomalayan bamboo rat
- Rhogeessa aeneus – Yucatan yellow bat
- Rhogeessa alleni – Allen's yellow bat
- Rhogeessa bickhami
- Rhogeessa genowaysi – Genoways's yellow bat
- Rhogeessa gracilis – Slender yellow bat
- Rhogeessa hussoni – Husson's yellow bat
- Rhogeessa io – Thomas's yellow bat
- Rhogeessa menchuae
- Rhogeessa minutilla – Tiny yellow bat
- Rhogeessa mira – Least yellow bat
- Rhogeessa parvula – Little yellow bat
- Rhogeessa tumida – Black-winged little yellow bat
- Rhogeessa velilla
- Rhombomys opimus – Great gerbil
- Rhynchocyon chrysopygus – Golden-rumped sengi
- Rhynchocyon cirnei – Chequered sengi
- Rhynchocyon petersi – Black and rufous sengi
- Rhynchocyon stuhlmanni
- Rhynchocyon udzungwensis – Grey-faced sengi
- Rhynchogale melleri – Meller's mongoose
- Rhyncholestes raphanurus – Long-nosed caenolestid
- Rhynchomeles prattorum – Seram bandicoot
- Rhynchomys banahao
- Rhynchomys isarogensis – Isarog rhynchomys
- Rhynchomys soricoides – Northern luzon rhynchomys
- Rhynchomys tapulao
- Rhynchonycteris naso – Proboscis bat
- Rhyneptesicus nasutus
- Romerolagus diazi – Volcano rabbit
- Rousettus aegyptiacus – Egyptian fruit bat
- Rousettus amplexicaudatus – Geoffroy's rousette
- Rousettus celebensis – Sulawesi rousette
- Rousettus leschenaultii – Leschenault's rousette
- Rousettus linduensis – Linduan rousette
- Rousettus madagascariensis – Madagascan rousette
- Rousettus obliviosus – Comoros rousette
- Rousettus spinalatus – Bare-backed rousette
- Rubrisciurus rubriventer – Sulawesi giant squirrel
- Rucervus duvaucelii – Barasingha
- Rucervus schomburgki – Schomburgk's deer
- Rungwecebus kipunji – Kipunji
- Rupicapra pyrenaica – Pyrenean chamois
- Rupicapra rupicapra – Northern chamois
- Ruwenzorisorex suncoides – Ruwenzori shrew
- Saccolaimus flaviventris – Yellow-bellied sheath-tailed bat
- Saccolaimus mixtus – Papuan sheath-tailed bat
- Saccolaimus peli – Pel's pouched bat
- Saccolaimus saccolaimus – Bare-rumped sheathtail-bat
- Saccopteryx antioquensis – Antioquian sac-winged bat
- Saccopteryx bilineata – Greater sac-winged bat
- Saccopteryx canescens – Frosted sac-winged bat
- Saccopteryx gymnura – Amazonian sac-winged bat
- Saccopteryx leptura – Lesser sac-winged bat
- Saccostomus campestris – Southern african pouched mouse
- Saccostomus mearnsi – East african pouched mouse
- Saccostomus umbriventer
- Saguinus bicolor – Brazilian bare-faced tamarin
- Saguinus geoffroyi – Geoffroy's tamarin
- Saguinus imperator – Emperor tamarin
- Saguinus inustus – Mottled-face tamarin
- Saguinus labiatus – Red-chested mustached tamarin
- Saguinus leucopus – Silvery-brown tamarin
- Saguinus martinsi – Martin's ochraceous bare-face tamarin
- Saguinus midas – Golden-handed tamarin
- Saguinus mystax – Moustached tamarin
- Saguinus niger – Black-handed tamarin
- Saguinus oedipus – Cotton-headed tamarin
- Saguinus ursulus
- Saiga tatarica – Saiga
- Saimiri boliviensis – Bolivian/peruvian squirrel monkey
- Saimiri cassiquiarensis
- Saimiri macrodon macrodon
- Saimiri collinsi
- Saimiri oerstedii – Black-crowned central american squirrel monkey
- Saimiri sciureus – Common squirrel monkey
- Saimiri ustus – Golden-backed squirrel monkey
- Saimiri vanzolinii – Black-headed squirrel monkey
- Salanoia concolor – Brown-tailed vontsira
- Salanoia durrelli
- Salinomys delicatus
- Salpingotus crassicauda – Thick-tailed pygmy jerboa
- Salpingotus heptneri – Heptner's pygmy jerboa
- Salpingotus kozlovi – Kozlov's pygmy jerboa
- Salpingotus michaelis – Baluchistan pygmy jerboa
- Salpingotus pallidus – Pallid pygmy jerboa
- Salpingotus thomasi
- Santamartamys rufodorsalis – Red crested tree rat
- Sapajus apella – Margarita island capuchin
- Sapajus cay – Azaras's capuchin
- Sapajus flavius – Blonde capuchin
- Sapajus libidinosus – Bearded capuchin
- Sapajus macrocephalus – Large-headed capuchin
- Sapajus nigritus – Black-horned capuchin
- Sapajus robustus – Crested capuchin
- Sapajus xanthosternos – Buff-headed capuchin
- Sarcophilus harrisii – Tasmanian devil
- Sauromys petrophilus – Roberts's flat-headed bat
- Saxatilomys paulinae – Paulina's limestone rat
- Scalopus aquaticus – Eastern mole
- Scapanulus oweni – Gansu mole
- Scapanus anthonyi
- Scapanus latimanus – Broad-footed mole
- Scapanus orarius – Coast mole
- Scapanus townsendii – Townsend's mole
- Scapteromys aquaticus
- Scapteromys meridionalis
- Scapteromys tumidus – Swamp rat
- Scaptochirus moschatus – Short-faced mole
- Scaptonyx fusicaudus – Long-tailed mole
- Scarturus elator
- Scarturus euphratica – Euphrates jerboa
- Scarturus hotsoni – Hotson's five-toed jerboa
- Scarturus tetradactyla – Four-toed jerboa
- Scarturus toussi
- Scarturus vinogradovi – Vinogradov's jerboa
- Scarturus williamsi – Williams's jerboa
- Sciurillus pusillus – Neotropical pygmy squirrel
- Sciurocheirus alleni – Allen's galago
- Sciurocheirus cameronensis
- Sciurocheirus gabonensis – Gabon squirrel galago
- Sciurocheirus makandensis
- Sciurotamias davidianus – Pére david's rock squirrel
- Sciurotamias forresti – Forrest's rock squirrel
- Sciurus aberti – Abert's squirrel
- Sciurus aestuans – Guianan squirrel
- Sciurus alleni – Allen's squirrel
- Sciurus anomalus – Caucasian squirrel
- Sciurus arizonensis – Arizona gray squirrel
- Sciurus aureogaster – Mexican grey squirrel
- Sciurus carolinensis – Eastern gray squirrel
- Sciurus colliaei – Collie's squirrel
- Sciurus deppei – Deppe's squirrel
- Sciurus flammifer – Fiery squirrel
- Sciurus gilvigularis – Yellow-throated squirrel
- Sciurus granatensis – Red-tailed squirrel
- Sciurus griseus – Western gray squirrel
- Sciurus ignitus – Bolivian squirrel
- Sciurus igniventris – Northern amazon red squirrel
- Sciurus lis – Japanese squirrel
- Sciurus meridionalis
- Sciurus nayaritensis – Mexican fox squirrel
- Sciurus niger – Delmarva fox squirrel
- Sciurus oculatus – Peters's squirrel
- Sciurus pucheranii – Andean squirrel
- Sciurus pyrrhinus – Junín red squirrel
- Sciurus richmondi – Richmond's squirrel
- Sciurus sanborni – Sanborn's squirrel
- Sciurus spadiceus – Southern amazon red squirrel
- Sciurus stramineus – Guayaquil squirrel
- Sciurus variegatoides – Variegated squirrel
- Sciurus vulgaris – Eurasian red squirrel
- Sciurus yucatanensis – Yucatan squirrel
- Scleronycteris ega – Ega long-tongued bat
- Scolomys melanops – South american spiny mouse
- Scolomys ucayalensis – Ucayali spiny mouse
- Scoteanax rueppellii – Greater broad-nosed bat
- Scotinomys teguina – Short-tailed singing mouse
- Scotinomys xerampelinus – Long-tailed singing mouse
- Scotoecus albigula
- Scotoecus albofuscus – Light-winged lesser house bat
- Scotoecus hindei
- Scotoecus hirundo – Dark-winged lesser house bat
- Scotoecus pallidus – Desert yellow lesser house bat
- Scotomanes ornatus – Harlequin bat
- Scotonycteris bergmansi
- Scotonycteris occidentalis
- Scotonycteris zenkeri – Zenker's fruit bat
- Scotophilus alvenslebeni
- Scotophilus andrewreborii
- Scotophilus borbonicus – Lesser yellow bat
- Scotophilus celebensis – Sulawesi yellow house bat
- Scotophilus collinus – Sody's yellow house bat
- Scotophilus dinganii – African yellow house bat
- Scotophilus ejetai
- Scotophilus heathii – Greater asiatic yellow house bat
- Scotophilus kuhlii – Lesser asiatic yellow house bat
- Scotophilus leucogaster – White-bellied yellow bat
- Scotophilus livingstoni
- Scotophilus marovaza – Marovaza house bat
- Scotophilus mhlanganii
- Scotophilus nigrita – Giant house bat
- Scotophilus nigritellus
- Scotophilus nucella – Robbins's house bat
- Scotophilus nux – Nut-colored yellow bat
- Scotophilus robustus – Robust yellow bat
- Scotophilus tandrefana – Western yellow bat
- Scotophilus trujilloi
- Scotophilus viridis – Lesser yellow house bat
- Scotorepens balstoni – Inland broad-nosed bat
- Scotorepens greyii – Little broad-nosed bat
- Scotorepens orion – Eastern broad-nosed bat
- Scotorepens sanborni – Northern broad-nosed bat
- Scotozous dormeri – Dormer's pipistrelle
- Scutisorex somereni – Armored shrew
- Scutisorex thori
- Sekeetamys calurus – Bushy-tailed jird
- Selevinia betpakdalaensis – Desert dormouse
- Semnopithecus ajax – Kashmir gray langur
- Semnopithecus entellus – Northern plains gray langur
- Semnopithecus hector – Tarai gray langur
- Semnopithecus hypoleucos – Black-footed gray langur
- Semnopithecus johnii
- Semnopithecus priam – Tufted gray langur
- Semnopithecus schistaceus – Nepal gray langur
- Semnopithecus vetulus
- Setifer setosus – Greater hedgehog tenrec
- Setonix brachyurus – Quokka
- Sicista armenica – Armenian birch mouse
- Sicista betulina – Northern birch mouse
- Sicista caucasica – Caucasian birch mouse
- Sicista caudata – Long-tailed birch mouse
- Sicista concolor – Chinese birch mouse
- Sicista kazbegica – Kazbeg birch mouse
- Sicista kluchorica – Kluchor birch mouse
- Sicista loriger
- Sicista napaea – Altai birch mouse
- Sicista pseudonapaea – Grey birch mouse
- Sicista severtzovi – Severtzov's birch mouse
- Sicista strandi – Strand's birch mouse
- Sicista subtilis – Southern birch mouse
- Sicista tianshanica – Tien shan birch mouse
- Sicista trizona
- Sigmodon alleni – Allen's cotton rat
- Sigmodon alstoni – Alston's cotton rat
- Sigmodon arizonae – Arizona cotton rat
- Sigmodon fulviventer – Tawny-bellied cotton rat
- Sigmodon hirsutus – Southern cotton rat
- Sigmodon hispidus – Hispid cotton rat
- Sigmodon inopinatus – Unexpected cotton rat
- Sigmodon leucotis – White-eared cotton rat
- Sigmodon mascotensis – West mexican cotton rat
- Sigmodon ochrognathus – Yellow-nosed cotton rat
- Sigmodon peruanus – Peruvian cotton rat
- Sigmodon planifrons – Miahuatlán cotton rat
- Sigmodon toltecus – Toltec cotton rat
- Sigmodon zanjonensis
- Sigmodontomys alfari – Short-tailed sigmodontomys
- Simias concolor – Pig-tailed snub-nosed monkey
- Smilodon populator
- Sminthopsis aitkeni – Kangaroo island dunnart
- Sminthopsis archeri – Chestnut dunnart
- Sminthopsis bindi – Kakadu dunnart
- Sminthopsis butleri – Butler's dunnart
- Sminthopsis crassicaudata – Fat-tailed dunnart
- Sminthopsis dolichura – Little long-tailed dunnart
- Sminthopsis douglasi – Julia creek dunnart
- Sminthopsis gilberti – Gilbert's dunnart
- Sminthopsis granulipes – White-tailed dunnart
- Sminthopsis griseoventer – Grey-bellied dunnart
- Sminthopsis hirtipes – Hairy-footed dunnart
- Sminthopsis leucopus – White-footed dunnart
- Sminthopsis longicaudata – Long-tailed dunnart
- Sminthopsis macroura – Stripe-faced dunnart
- Sminthopsis murina – Common dunnart
- Sminthopsis ooldea – Ooldea dunnart
- Sminthopsis psammophila – Sandhill dunnart
- Sminthopsis virginiae – Red-cheeked dunnart
- Sminthopsis youngsoni – Lesser hairy-footed dunnart
- Smutsia gigantea – Giant ground pangolin
- Smutsia temminckii – Temminck's ground pangolin
- Solenodon cubanus – Cuban solenodon
- Solenodon marcanoi – Marcano's solenodon
- Solenodon paradoxus – Hispaniolan solenodon
- Solisorex pearsoni – Pearson's long-clawed shrew
- Solomys ponceleti – Poncelet's giant rat
- Solomys salamonis – Florida giant rat
- Solomys salebrosus – Bougainville giant rat
- Solomys sapientis – Isabel giant rat
- Sommeromys macrorhinos – Sommer's sulawesi rat
- Sooretamys angouya
- Sorex alaskanus – Glacier bay water shrew
- Sorex albibarbis
- Sorex alpinus – Alpine shrew
- Sorex antinorii – Valais shrew
- Sorex araneus – Eurasian shrew
- Sorex arcticus – Arctic shrew
- Sorex arizonae – Arizona shrew
- Sorex arunchi – Udine shrew
- Sorex asper – Tien shan shrew
- Sorex averini
- Sorex bairdii
- Sorex bedfordiae – Lesser stripe-backed shrew
- Sorex bendirii – Marsh shrew
- Sorex buchariensis – Pamir shrew
- Sorex caecutiens – Laxmann's shrew
- Sorex camtschatica – Kamchatcka shrew
- Sorex cansulus – Gansu shrew
- Sorex chiapensis
- Sorex cinereus – Cinereus shrew
- Sorex coronatus – Crowned shrew
- Sorex cristobalensis
- Sorex cylindricauda – Stripe-backed shrew
- Sorex daphaenodon – Large-toothed siberian shrew
- Sorex dispar – Long-tailed shrew
- Sorex emarginatus – Zacatecas shrew
- Sorex excelsus – Highland shrew
- Sorex fumeus – Smoky shrew
- Sorex gracillimus – Slender shrew
- Sorex granarius – Lagranja shrew
- Sorex haydeni – Prairie shrew
- Sorex hosonoi – Azumi shrew
- Sorex hoyi – American pygmy shrew
- Sorex ibarrai
- Sorex isodon – Even-toothed shrew
- Sorex ixtlanensis – Ixtlan shrew
- Sorex jacksoni – Saint lawrence island shrew
- Sorex kozlovi – Kozlov's shrew
- Sorex leucogaster – Paramushir shrew
- Sorex longirostris – Southeastern shrew
- Sorex lyelli – Mount lyell shrew
- Sorex macrodon – Large-toothed shrew
- Sorex madrensis
- Sorex maritimensis – Maritime shrew
- Sorex mccarthyi
- Sorex mediopua – Jalisco shrew
- Sorex merriami – Merriam's shrew
- Sorex milleri – Carmen mountain shrew
- Sorex minutissimus – Eurasian least shrew
- Sorex minutus – Eurasian pygmy shrew
- Sorex mirabilis – Ussuri shrew
- Sorex monticolus – Montane shrew
- Sorex nanus – Dwarf shrew
- Sorex navigator
- Sorex neomexicanus – New mexico shrew
- Sorex oreopolus – Mexican long-tailed shrew
- Sorex orizabae – Orizaba shrew
- Sorex ornatus – Ornate shrew
- Sorex pacificus – Pacific shrew
- Sorex palustris – American water shrew
- Sorex planiceps – Kashmir shrew
- Sorex portenkoi – Portenko's shrew
- Sorex preblei – Preble's shrew
- Sorex pribilofensis – Pribilof island shrew
- Sorex raddei – Radde's shrew
- Sorex roboratus – Flat-skulled shrew
- Sorex rohweri – Olympic shrew
- Sorex salvini
- Sorex samniticus – Appenine shrew
- Sorex satunini – Caucasian shrew
- Sorex saussurei – Saussure's shrew
- Sorex sclateri – Sclater's shrew
- Sorex shinto – Shinto shrew
- Sorex sinalis – Chinese shrew
- Sorex sonomae – Fog shrew
- Sorex stizodon – San cristobal shrew
- Sorex tenellus – Inyo shrew
- Sorex thibetanus – Tibetan shrew
- Sorex trowbridgii – Trowbridge's shrew
- Sorex tundrensis – Tundra shrew
- Sorex ugyunak – Barren ground shrew
- Sorex unguiculatus – Long-clawed shrew
- Sorex vagrans – Vagrant shrew
- Sorex ventralis – Chestnut-bellied shrew
- Sorex veraecrucis
- Sorex veraepacis – Verapaz shrew
- Sorex volnuchini – Caucasian pygmy shrew
- Sorex yukonicus – Alaska tiny shrew
- Soricomys kalinga – Cordillera shrew-mouse
- Soricomys leonardocoi
- Soricomys montanus
- Soricomys musseri – Sierra madre shrew mouse
- Soriculus nigrescens – Sikkim large-clawed shrew
- Sotalia fluviatilis – Tucuxi
- Sotalia guianensis – Guiana dolphin
- Sousa chinensis – Indo-pacific humpbacked dolphin
- Sousa plumbea
- Sousa sahulensis
- Sousa teuszii – Atlantic humpbacked dolphin
- Spalacopus cyanus – Coruro
- Spalax antiquus
- Spalax arenarius – Sandy mole rat
- Spalax giganteus – Giant mole rat
- Spalax graecus – Balkan blind mole rat
- Spalax istricus
- Spalax microphthalmus – Greater blind mole rat
- Spalax uralensis – Kazakhstan blind mole rat
- Spalax zemni – Podolian mole rat
- Speothos venaticus – Bush dog
- Spermophilopsis leptodactylus – Long-clawed ground squirrel
- Spermophilus alashanicus – Alashan ground squirrel
- Spermophilus brevicauda – Brandt's ground squirrel
- Spermophilus citellus – European ground squirrel
- Spermophilus dauricus – Daurian ground squirrel
- Spermophilus erythrogenys – Red-cheeked ground squirrel
- Spermophilus fulvus – Yellow ground squirrel
- Spermophilus major – Russet ground squirrel
- Spermophilus musicus musicus
- Spermophilus nilkaensis nilkaensis
- Spermophilus pallidicauda – Pallid ground squirrel
- Spermophilus pygmaeus – Little ground squirrel
- Spermophilus relictus – Tien shan ground squirrel
- Spermophilus suslicus – Speckled ground squirrel
- Spermophilus taurensis
- Spermophilus xanthoprymnus – Asia minor ground squirrel
- Sphaerias blanfordi – Blandford's fruit bat
- Sphaeronycteris toxophyllum – Visored bat
- Spilocuscus kraemeri – Admiralty cuscus
- Spilocuscus maculatus – Common spotted cuscus
- Spilocuscus nudicaudatus
- Spilocuscus papuensis – Waigeo cuscus
- Spilocuscus rufoniger – Black-spotted cuscus
- Spilocuscus wilsoni – Blue-eyed spotted cuscus
- Spilogale angustifrons – Southern spotted skunk
- Spilogale gracilis – Western spotted skunk
- Spilogale putorius – Eastern spotted skunk
- Spilogale pygmaea – Pygmy spotted skunk
- Srilankamys ohiensis – Ohiya rat
- Steatomys bocagei
- Steatomys caurinus – Northwestern fat mouse
- Steatomys cuppedius – Dainty fat mouse
- Steatomys jacksoni – Jackson's fat mouse
- Steatomys krebsii – Kreb's fat mouse
- Steatomys opimus
- Steatomys parvus – Tiny fat mouse
- Steatomys pratensis – Fat mouse
- Stenella attenuata – Pantropical spotted dolphin
- Stenella clymene – Clymene dolphin
- Stenella coeruleoalba – Striped dolphin
- Stenella frontalis – Atlantic spotted dolphin
- Stenella longirostris – Spinner dolphin
- Steno bredanensis – Rough-toothed dolphin
- Stenocephalemys albipes – Ethiopian white-footed mouse
- Stenocephalemys albocaudata – Ethiopian narrow-headed rat
- Stenocephalemys griseicauda – Gray-tailed narrow-headed rat
- Stenocephalemys ruppi – Rupp's mouse
- Stenoderma rufum – Red fruit bat
- Stenonycteris lanosus
- Stochomys longicaudatus – Target rat
- Strepsiceros strepsiceros – Greater kudu
- Strigocuscus celebensis – Small sulawesi cuscus
- Strigocuscus sangirensis
- Sturnira adrianae
- Sturnira angeli
- Sturnira aratathomasi – Aratathomas's yellow-shouldered bat
- Sturnira bakeri
- Sturnira bidens – Bidentate yellow-shouldered bat
- Sturnira bogotensis – Bogota yellow-shouldered bat
- Sturnira burtonlimi
- Sturnira erythromos – Hairy yellow-shouldered bat
- Sturnira hondurensis
- Sturnira koopmanhilli
- Sturnira lilium – Little yellow-shouldered bat
- Sturnira ludovici – Highland yellow-shouldered bat
- Sturnira luisi – Louis's yellow-shouldered bat
- Sturnira magna – Greater yellow-shouldered bat
- Sturnira mistratensis
- Sturnira mordax – Talamancan yellow-shouldered bat
- Sturnira nana – Lesser yellow-shouldered bat
- Sturnira oporaphilum – Tschudi's yellow-shouldered bat
- Sturnira parvidens
- Sturnira paulsoni
- Sturnira perla
- Sturnira sorianoi
- Sturnira tildae – Tilda's yellow-shouldered bat
- Styloctenium mindorensis – Mindoro stripe-faced fruit bat
- Styloctenium wallacei – Wallace's stripe-faced fruit bat
- Stylodipus andrewsi – Andrews's three-toed jerboa
- Stylodipus sungorus – Mongolian three-toed jerboa
- Stylodipus telum – Thick-tailed three-toed jerboa
- Submyotodon caliginosus
- Submyotodon latirostris
- Submyotodon moupinensis
- Suncus aequatorius
- Suncus ater – Black shrew
- Suncus dayi – Day's shrew
- Suncus etruscus – Pygmy white-toothed shrew
- Suncus fellowesgordoni – Ceylon pygmy shrew
- Suncus hosei – Bornean pgymy shrew
- Suncus hututsi
- Suncus infinitesimus – Least dwarf shrew
- Suncus lixus – Greater dwarf shrew
- Suncus malayanus – Malayan pygmy shrew
- Suncus megalura – Climbing shrew
- Suncus mertensi – Flores shrew
- Suncus montanus – Sri lanka highland shrew
- Suncus murinus – House shrew
- Suncus niger
- Suncus remyi – Remy's pygmy shrew
- Suncus stoliczkanus – Anderson's shrew
- Suncus varilla – Lesser dwarf shrew
- Suncus zeylanicus – Sri lankan shrew
- Rattus annandalei – Annandale's sundaic rat
- Sundamys infraluteus – Mountain sundamys
- Sundamys maxi – Javan sundamys
- Sundamys muelleri – Müller's sundamys
- Sundasciurus altitudinis
- Sundasciurus brookei – Brooke's squirrel
- Sundasciurus davensis – Davao squirrel
- Sundasciurus everetti
- Sundasciurus fraterculus – Fraternal squirrel
- Sundasciurus hippurus – Horse-tailed squirrel
- Sundasciurus hoogstraali – Busuanga squirrel
- Sundasciurus jentinki – Jentink's squirrel
- Sundasciurus juvencus – Northern palawan tree squirrel
- Sundasciurus lowii – Low's squirrel
- Sundasciurus mindanensis – Mindanao squirrel
- Sundasciurus moellendorffi – Culion tree squirrel
- Sundasciurus philippinensis – Philippine tree squirrel
- Sundasciurus rabori – Palawan montane squirrel
- Sundasciurus samarensis – Samar squirrel
- Sundasciurus steerii – Southern palawan tree squirrel
- Sundasciurus tahan
- Sundasciurus tenuis – Slender squirrel
- Surdisorex norae – Aberdare mole shrew
- Surdisorex polulus – Mt. kenya mole shrew
- Surdisorex schlitteri
- Suricata suricatta – Meerkat
- Sus ahoenobarbus – Palawan bearded pig
- Sus barbatus – Bearded pig
- Sus cebifrons – Visayan warty pig
- Sus celebensis – Sulawesi warty pig
- Sus oliveri – Oliver's warty pig
- Sus philippensis – Philippine warty pig
- Sus scrofa – Wild boar
- Sus verrucosus – Javan warty pig
- Syconycteris australis – Common blossom bat
- Syconycteris carolinae – Halmaheran blossom bat
- Syconycteris hobbit – Moss-forest blossom bat
- Sylvicapra grimmia – Common duiker
- Sylvilagus andinus
- Sylvilagus aquaticus – Swamp rabbit
- Sylvilagus audubonii – Desert cottontail
- Sylvilagus bachmani – Brush rabbit
- Sylvilagus brasiliensis – Tapeti
- Sylvilagus cognatus – Manzano mountain cottontail
- Sylvilagus cunicularius – Mexican cottontail
- Sylvilagus dicei – Dice's cottontail
- Sylvilagus floridanus – Eastern cottontail
- Sylvilagus gabbi
- Sylvilagus graysoni – Tres marias cottontail
- Sylvilagus insonus – Omilteme cottontail
- Sylvilagus mansuetus – San jose brush rabbit
- Sylvilagus nuttallii – Mountain cottontail
- Sylvilagus obscurus – Appalachian cottontail
- Sylvilagus palustris – Marsh rabbit
- Sylvilagus parentum
- Sylvilagus robustus – Robust cottontail
- Sylvilagus sanctaemartae
- Sylvilagus tapetillus
- Sylvilagus transitionalis – New england cottontail
- Sylvilagus varynaensis – Venezuelan lowland rabbit
- Sylvisorex akaibei – Dudu akaibe's pygmy shrew
- Sylvisorex camerunensis
- Sylvisorex corbeti
- Sylvisorex granti – Grant's forest shrew
- Sylvisorex howelli – Howell's forest shrew
- Sylvisorex isabellae – Bioko forest shrew
- Sylvisorex johnstoni – Johnston's forest shrew
- Sylvisorex konganensis – Kongana shrew
- Sylvisorex lunaris – Moon forest shrew
- Sylvisorex morio – Arrogant shrew
- Sylvisorex ollula – Forest musk shrew
- Sylvisorex oriundus – Lesser forest shrew
- Sylvisorex pluvialis – Rain forest shrew
- Sylvisorex silvanorum – Bamenda pygmy shrew
- Sylvisorex vulcanorum – Volcano shrew
- Symphalangus syndactylus – Siamang
- Synaptomys borealis – Okanagan bog lemming
- Synaptomys cooperi – Southern bog lemming
- Syncerus caffer – African buffalo
- Syntheosciurus brochus – Neotropical montane squirrel
- Tachyglossus aculeatus – Short-beaked echidna
- Tachyoryctes macrocephalus – Giant mole rat
- Tachyoryctes splendens – East african mole rat
- Tadarida aegyptiaca – Egyptian free-tailed bat
- Tadarida brasiliensis – Brazilian free-tailed bat
- Tadarida fulminans – Malagasy free-tailed bat
- Tadarida insignis – East asian free-tailed bat
- Tadarida latouchei – La touche's free-tailed bat
- Tadarida lobata – Kenyan big-eared free-tailed bat
- Tadarida teniotis – European free-tailed bat
- Tadarida ventralis – African giant free-tailed bat
- Taeromys arcuatus – Southeastern mountain taeromys
- Taeromys callitrichus – Greater taeromys
- Taeromys celebensis – Long-tailed taeromys
- Taeromys hamatus – Central mountain taeromys
- Taeromys microbullatus – Small-eared taeromys
- Taeromys punicans – Reddish-furred taeromys
- Taeromys taerae – Northeastern mountain taeromys
- Talpa altaica – Siberian mole
- Talpa aquitania
- Talpa caeca – Mediterranean mole
- Talpa caucasica – Caucasian mole
- Talpa davidiana – Père david's mole
- Talpa europaea – European mole
- Talpa levantis – Levantine mole
- Talpa occidentalis – Iberian mole
- Talpa ognevi
- Talpa romana – Roman mole
- Talpa stankovici – Balkan mole
- Talpa talyschensis
- Talpa transcaucasica
- Tamandua mexicana – Northern tamandua
- Tamandua tetradactyla – Southern tamandua
- Tamias striatus – Eastern chipmunk
- Tamiasciurus douglasii – Douglas's squirrel
- Tamiasciurus fremonti
- Tamiasciurus hudsonicus – Red squirrel
- Tamiops mcclellandii
- Tamiops maritimus – Maritime striped squirrel
- Tamiops rodolphii – Cambodian striped squirrel
- Tamiops swinhoei – Swinhoe's striped squirrel
- Tanyuromys aphrastus
- Tapecomys primus
- Tapecomys wolffsohni
- Taphozous achates – Indonesian tomb bat
- Taphozous australis – Coastal sheath-tailed bat
- Taphozous georgianus – Common sheath-tailed bat
- Taphozous hamiltoni – Hamilton's tomb bat
- Taphozous hildegardeae – Hildegarde's tomb bat
- Taphozous hilli – Hill's sheath-tailed bat
- Taphozous kapalgensis – Arnhem sheath-tailed bat
- Taphozous longimanus – Long-winged tomb bat
- Taphozous mauritianus – Mauritian tomb bat
- Taphozous melanopogon – Black-bearded tomb bat
- Taphozous nudiventris – Naked-rumped tomb bat
- Taphozous perforatus – Egyptian tomb bat
- Taphozous theobaldi – Theobold's bat
- Taphozous troughtoni – Troughton's sheath-tailed bat
- Tapirella bairdii – Baird's tapir
- Tapirus kabomani
- Tapirus pinchaque – Mountain tapir
- Tapirus terrestris – Lowland tapir
- Tarsipes rostratus – Honey possum
- Tarsius dentatus – Dian's tarsier
- Tarsius fuscus
- Tarsius lariang – Lariang tarsier
- Tarsius pelengensis – Peleng tarsier
- Tarsius pumilus – Pygmy tarsier
- Tarsius sangirensis – Sangihe tarsier
- Tarsius spectrumgurskyae
- Tarsius supriatnai
- Tarsius tarsier – Spectral tarsier
- Tarsius tumpara – Siau island tarsier
- Tarsius wallacei – Wallace's tarsier
- Tarsomys apoensis – Dusky tarsomys
- Tarsomys echinatus – Spiny tarsomys
- Tasmacetus shepherdi – Shepherd's beaked whale
- Tateomys macrocercus – Long-tailed sulawesian shrew rat
- Tateomys rhinogradoides – Tate's sulawesian shrew rat
- Tatera indica – Indian gerbil
- Taterillus arenarius – Robbins's tateril
- Taterillus congicus – Congo tateril
- Taterillus emini – Emin's tateril
- Taterillus gracilis – Gracile tateril
- Taterillus lacustris – Lake chad tateril
- Taterillus petteri – Petter's tateril
- Taterillus pygargus – Senegal tateril
- Taterillus tranieri – Tranieri's tateril
- Taurotragus derbianus – Giant eland
- Taurotragus oryx – Common eland
- Taxidea taxus – American badger
- Tayassu pecari – White-lipped peccary
- Tenrec ecaudatus – Tailess tenrec
- Tetracerus quadricornis – Four-horned antelope
- Thallomys loringi – Loring's rat
- Thallomys nigricauda – Black-tailed tree rat
- Thallomys paedulcus – Acacia rat
- Thallomys shortridgei – Shortridge's rat
- Thalpomys cerradensis – Cerrado mouse
- Thalpomys lasiotis – Hairy-eared cerrado mouse
- Thamnomys kempi – Kemp's thicket rat
- Thamnomys major
- Thamnomys schoutedeni – Schouteden's thicket rat
- Thamnomys venustus – Charming thicket rat
- Thaptomys nigrita – Blackish grass mouse
- Theropithecus gelada – Gelada
- Thomasomys andersoni
- Thomasomys apeco
- Thomasomys aureus – Golden oldfield mouse
- Thomasomys auricularis
- Thomasomys australis
- Thomasomys baeops – Beady-eyed mouse
- Thomasomys bombycinus – Silky oldfield mouse
- Thomasomys caudivarius
- Thomasomys cinereiventer – Ashy-bellied oldfield mouse
- Thomasomys cinereus – Ash-colored oldfield mouse
- Thomasomys cinnameus
- Thomasomys contradictus
- Thomasomys daphne – Daphne's oldfield mouse
- Thomasomys dispar
- Thomasomys eleusis – Peruvian oldfield mouse
- Thomasomys emeritus
- Thomasomys erro
- Thomasomys fumeus
- Thomasomys gracilis – Slender oldfield mouse
- Thomasomys hudsoni
- Thomasomys hylophilus – Woodland oldfield mouse
- Thomasomys incanus – Inca oldfield mouse
- Thomasomys ischyrus – Strong-tailed oldfield mouse
- Thomasomys kalinowskii – Kalinowski's oldfield mouse
- Thomasomys ladewi – Ladew's oldfield mouse
- Thomasomys laniger – Butcher oldfield mouse
- Thomasomys macrotis
- Thomasomys monochromos – Unicolored oldfield mouse
- Thomasomys nicefori
- Thomasomys niveipes – Snow-footed oldfield mouse
- Thomasomys notatus – Distinguished oldfield mouse
- Thomasomys onkiro
- Thomasomys oreas – Montane oldfield mouse
- Thomasomys paramorum – Paramo oldfield mouse
- Thomasomys popayanus
- Thomasomys praetor
- Thomasomys princeps
- Thomasomys pyrrhonotus – Thomas's oldfield mouse
- Thomasomys rosalinda – Rosalinda's oldfield mouse
- Thomasomys silvestris – Forest oldfield mouse
- Thomasomys taczanowskii – Taczanowski's oldfield mouse
- Thomasomys ucucha
- Thomasomys vestitus – Dressy oldfield mouse
- Thomasomys vulcani
- Thomomys atrovarius
- Thomomys bottae – Botta's pocket gopher
- Thomomys bulbivorus – Camas pocket gopher
- Thomomys clusius – Wyoming pocket gopher
- Thomomys idahoensis – Idaho pocket gopher
- Thomomys mazama – Western pocket gopher
- Thomomys monticola – Mountain pocket gopher
- Thomomys nayarensis
- Thomomys sheldoni
- Thomomys talpoides – Vancouver pocket gopher
- Thomomys townsendii – Townsend's pocket gopher
- Thomomys umbrinus – Animas mountains pocket gopher
- Thoopterus nigrescens – Swift fruit bat
- Thoopterus suhaniahae
- Thrichomys apereoides – Common punare
- Thrichomys fosteri
- Thrichomys inermis
- Thrichomys laurentius
- Thrichomys pachyurus
- Thryonomys gregorianus – Lesser cane rat
- Thryonomys swinderianus – Greater cane rat
- Thylacinus cynocephalus – Thylacine
- Thylamys citellus
- Thylamys elegans – Elegant fat-tailed mouse opossum
- Thylamys karimii – Karimi's fat-tailed mouse opossum
- Thylamys macrurus – Paraguayan fat-tailed mouse opossum
- Thylamys pallidior – Pallid fat-tailed opossum
- Thylamys pulchellus
- Thylamys pusillus – Small fat-tailed opossum
- Thylamys sponsorius
- Thylamys tatei
- Thylamys velutinus – Dwarf fat-tailed mouse opossum
- Thylamys venustus – Buff-bellied fat-tailed mouse opossum
- Thylogale billardierii – Tasmanian pademelon
- Thylogale browni – New guinea pademelon
- Thylogale brunii – Dusky pademelon
- Thylogale calabyi – Calaby's pademelon
- Thylogale stigmatica – Red-legged pademelon
- Thylogale thetis – Red-necked pademelon
- Thyroptera devivoi
- Thyroptera discifera – Peters's disk-winged bat
- Thyroptera lavali – Laval's disk-winged bat
- Thyroptera tricolor – Spix's disk-winged bat
- Thyroptera wynneae
- Tlacuatzin canescens – Grayish mouse opossum
- Tokudaia muenninki – Okinawa spiny rat
- Tokudaia osimensis – Ryukyu spiny rat
- Tokudaia tokunoshimensis – Tokunoshima spiny rat
- Tolypeutes matacus – Southern three-banded armadillo
- Tolypeutes tricinctus – Brazilian three-banded armadillo
- Tomopeas ravus – Blunt-eared bat
- Tonatia bidens – Greater round-eared bat
- Tonatia saurophila – Stripe-headed round-eared bat
- Tonkinomys daoventieni
- Toromys grandis – Giant tree rat
- Toromys rhipidurus – Peruvian toro
- Trachops cirrhosus – Fringe-lipped bat
- Trachypithecus auratus – Javan lutung
- Trachypithecus barbei – Tenasserim lutung
- Trachypithecus crepusculus
- Trachypithecus cristatus – Silvery lutung
- Trachypithecus delacouri – Delacour's langur
- Trachypithecus ebenus
- Trachypithecus francoisi – François's langur
- Trachypithecus geei – Gee's golden langur
- Trachypithecus germaini – Indochinese lutung
- Trachypithecus hatinhensis – Hatinh langur
- Trachypithecus laotum – Laotian langur
- Trachypithecus leucocephalus
- Trachypithecus margarita
- Trachypithecus mauritius
- Trachypithecus obscurus – Spectacled leaf monkey
- Trachypithecus phayrei – Phayre's leaf-monkey
- Trachypithecus pileatus – Capped langur
- Trachypithecus poliocephalus – Golden-headed langur
- Trachypithecus selangorensis
- Trachypithecus shortridgei – Shortridge's langur
- Tragelaphus buxtoni – Mountain nyala
- Tragelaphus eurycerus – Bongo
- Tragelaphus scriptus – Bushbuck
- Tragelaphus spekii – Sitatunga
- Tragulus javanicus – Javan chevrotain
- Tragulus kanchil – Lesser oriental chevrotain
- Tragulus napu – Greater oriental chevrotain
- Tragulus nigricans – Balabac mouse deer
- Tragulus versicolor – Silver-backed chevrotain
- Tragulus williamsoni – Williamson's chevrotain
- Transandinomys bolivaris – Bolivar rice rat
- Transandinomys talamancae – Talamancan rice rat
- Tremarctos ornatus – Spectacled bear
- Triaenops afer
- Triaenops menamena
- Triaenops parvus
- Triaenops persicus – Persian trident bat
- Trichechus inunguis – South american manatee
- Trichechus manatus – American manatee
- Trichechus senegalensis – African manatee
- Trichosurus caninus – Short-eared brushtail possum
- Trichosurus cunninghami – Mountain brushtail possum
- Trichosurus johnstonii
- Trichosurus vulpecula – Common brushtail possum
- Trichys fasciculata – Long-tailed porcupine
- Trinomys albispinus – White-spined spiny rat
- Trinomys dimidiatus – Atlantic spiny rat
- Trinomys eliasi
- Trinomys gratiosus
- Trinomys iheringi – Ihering's spiny rat
- Trinomys mirapitanga
- Trinomys moojeni
- Trinomys paratus
- Trinomys setosus – Hairy spiny rat
- Trinomys yonenagae
- Trinycteris nicefori – Niceforo's big-eared bat
- Trogopterus xanthipes – Complex-toothed flying squirrel
- Tryphomys adustus – Luzon tryphomys
- Tscherskia triton – Greater long-tailed hamster
- Tupaia belangeri – Northern treeshrew
- Tupaia chrysogaster – Golden-bellied treeshrew
- Tupaia discolor
- Tupaia dorsalis – Striped treeshrew
- Tupaia everetti
- Tupaia ferruginea
- Tupaia glis – Common treeshrew
- Tupaia gracilis – Slender treeshrew
- Tupaia hypochrysa
- Tupaia javanica – Horsfield's treeshrew
- Tupaia longipes – Long-footed treeshrew
- Tupaia minor – Lesser treeshrew
- Tupaia moellendorffi – Calamian treeshrew
- Tupaia montana – Mountain treeshrew
- Tupaia nicobarica – Nicobar treeshrew
- Tupaia palawanensis – Palawan treeshrew
- Tupaia picta – Painted treeshrew
- Tupaia salatana
- Tupaia splendidula – Ruddy treeshrew
- Tupaia tana – Large treeshrew
- Tursiops aduncus – Indo-pacific bottlenose dolphin
- Tursiops australis
- Tursiops gephyreus
- Tursiops truncatus – Common bottlenose dolphin
- Tylomys bullaris – Chiapan climbing rat
- Tylomys fulviventer – Fulvous-bellied climbing rat
- Tylomys mirae – Mira climbing rat
- Tylomys nudicaudus – Peters's climbing rat
- Tylomys panamensis – Panamá climbing rat
- Tylomys tumbalensis – Tumbalá climbing rat
- Tylomys watsoni – Watson's climbing rat
- Tylonycteris fulvida
- Tylonycteris malayana
- Tylonycteris pachypus – Lesser bamboo bat
- Tylonycteris pygmaeus
- Tylonycteris robustula – Greater flat-headed bat
- Tylonycteris tonkinensis
- Tympanoctomys barrerae – Plains viscacha rat
- Tympanoctomys kirchnerorum – Kirchner's viscacha rat
- Tympanoctomys loschalchalerosorum – Chalchalero viscacha rat
- Typhlomys chapensis
- Typhlomys cinereus – Sort-furred tree mouse
- Typhlomys daloushanensis
- Typhlomys nanus
- Uranomys ruddi – Rudd's bristle-furred rat
- Urocitellus armatus – Uinita ground squirrel
- Urocitellus beldingi – Belding's ground squirrel
- Urocitellus brunneus – Idaho ground squirrel
- Urocitellus canus – Merriam's ground squirrel
- Urocitellus columbianus – Columbian ground squirrel
- Urocitellus elegans – Wyoming ground squirrel
- Urocitellus mollis – Piute ground squirrel
- Urocitellus parryii – Arctic ground squirrel
- Urocitellus richardsonii – Richardson's ground squirrel
- Urocitellus townsendii – Townsend's ground squirrel
- Urocitellus undulatus – Long-tailed ground squirrel
- Urocitellus washingtoni – Washington ground squirrel
- Urocyon cinereoargenteus – Grey fox
- Urocyon littoralis – Island fox
- Uroderma bakeri
- Uroderma bilobatum – Tent-making bat
- Uroderma convexum
- Uroderma davisi
- Uroderma magnirostrum – Brown tent-making bat
- Uromys anak – Black-tailed giant rat
- Uromys boeadii – Biak giant rat
- Uromys caudimaculatus – White-tailed giant rat
- Uromys emmae – Emma's giant rat
- Uromys hadrourus – Pygmy white-tailed rat
- Uromys imperator – Emperor rat
- Uromys neobritannicus – Bismarck giant rat
- Uromys porculus – Guadalcanal rat
- Uromys rex – King rat
- Uromys siebersi – Great key island uromys
- Uropsilus aequodonenia
- Uropsilus andersoni – Anderson's shrew mole
- Uropsilus atronates
- Uropsilus gracilis – Gracile shrew mole
- Uropsilus investigator – Inquisitive shrew mole
- Uropsilus nivatus
- Uropsilus soricipes – Chinese shrew mole
- Urotrichus talpoides – Japanese shrew mole
- Ursus americanus – American black bear
- Ursus arctos – Brown bear
- Ursus deningeri
- Ursus maritimus – Polar bear
- Ursus spelaeus
- Ursus thibetanus – Asiatic black bear
- Urva auropunctata
- Urva brachyura
- Urva edwardsii
- Urva fusca
- Urva javanica
- Urva semitorquata
- Urva smithii
- Urva urva
- Urva vitticolla
- Vampyressa elisabethae
- Vampyressa melissa – Melissa's yellow-eared bat
- Vampyressa pusilla – Southern little yellow-eared bat
- Vampyressa sinchi
- Vampyressa thyone – Northern little yellow-eared bat
- Vampyriscus bidens
- Vampyriscus brocki
- Vampyriscus nymphaea
- Vampyrodes caraccioli – Great stripe-faced bat
- Vampyrodes major
- Vampyrum spectrum – Spectral bat
- Vandeleuria nilagirica – Nilgiri long-tailed tree mouse
- Vandeleuria nolthenii – Sri lankan highland tree mouse
- Vandeleuria oleracea – Asiatic long-tailed climbing mouse
- Varecia rubra – Red ruffed lemur
- Varecia variegata – Black-and-white ruffed lemur
- Vernaya fulva – Vernay's climbing mouse
- Vespadelus baverstocki – Inland forest bat
- Vespadelus caurinus – Northern cave bat
- Vespadelus darlingtoni – Large forest bat
- Vespadelus douglasorum – Yellow-lipped cave bat
- Vespadelus finlaysoni – Finlayson's cave bat
- Vespadelus pumilus – Eastern forest bat
- Vespadelus regulus – Southern forest bat
- Vespadelus troughtoni – Eastern cave bat
- Vespadelus vulturnus – Little forest bat
- Vespertilio murinus – Particoloured bat
- Vespertilio sinensis – Asian particolored bat
- Viverra civettina – Malabar civet
- Viverra megaspila – Large-spotted civet
- Viverra tangalunga – Malay civet
- Viverra zibetha – Large indian civet
- Viverricula indica – Small indian civet
- Voalavo antsahabensis – Eastern voalavo
- Voalavo gymnocaudus – Northern voalavo
- Volemys millicens – Sichuan vole
- Volemys musseri – Marie's vole
- Vombatus ursinus – Common wombat
- Vormela peregusna – Marbled polecat
- Vulpes bengalensis – Bengal fox
- Vulpes cana – Blanford's fox
- Vulpes chama – Cape fox
- Vulpes corsac – Corsac fox
- Vulpes ferrilata – Tibetan fox
- Vulpes lagopus – Arctic fox
- Vulpes macrotis – Kit fox
- Vulpes pallida – Pale fox
- Vulpes rueppelli
- Vulpes velox – Swift fox
- Vulpes vulpes – Red fox
- Vulpes zerda – Fennec fox
- Waiomys mamasae
- Wallabia bicolor – Swamp wallaby
- Wiedomys cerradensis
- Wiedomys pyrrhorhinos – Red-nosed mouse
- Wilfredomys oenax – Greater wilfred's mouse
- Wyulda squamicaudata – Scaly-tailed possum
- Xenogale naso
- Xenomys nelsoni – Magdelena wood rat
- Xenothrix mcgregori – Jamaican monkey
- Xenuromys barbatus – Rock-dwelling giant rat
- Xeromys myoides – Water mouse
- Xeronycteris vieirai
- Xerospermophilus mohavensis – Mohave ground squirrel
- Xerospermophilus perotensis – Perote ground squirrel
- Xerospermophilus spilosoma – Spotted ground squirrel
- Xerospermophilus tereticaudus – Round-tailed ground squirrel
- Xerus rutilus – Unstriped ground squirrel
- Zaedyus pichiy – Pichi
- Zaglossus attenboroughi – Sir david's long-beaked echidna
- Zaglossus bartoni – Eastern long-beaked echidna
- Zaglossus bruijni
- Zalophus californianus – Californian sea lion
- Zalophus japonicus – Japanese sea lion
- Zalophus wollebaeki – Galápagos sea lion
- Zapus hudsonius – Meadow jumping mouse
- Zapus luteus
- Zapus okanoganensis
- Zapus orarius
- Zapus oregonus
- Zapus pacificus
- Zapus princeps – Pacific jumping mouse
- Zapus saltator
- Zapus trinotatus – Point reyes jumping mouse
- Zelotomys hildegardeae – Hildegarde's broad-headed mouse
- Zelotomys woosnami – Woosnam's broad-headed mouse
- Zenkerella insignis – Flightless scaly-tailed squirrel
- Ziphius cavirostris – Cuvier's beaked whale
- Zygodontomys brevicauda – Short-tailed cane mouse
- Zygodontomys brunneus – Brown cane mouse
- Zygogeomys trichopus – Michoacan pocket gopher
- Zyzomys argurus – Common rock rat
- Zyzomys maini – Arnhem rock-rat
- Zyzomys palatalis – Carpentarian rock-rat
- Zyzomys pedunculatus – Central rock-rat
- Zyzomys woodwardi – Kimberley rock rat