The tiger (Panthera tigris) is the largest species among the Felidae and classified in the genus Panthera. It is most recognizable for its dark vertical stripes on reddish-orange fur with a lighter underside. It is an apex predator, primarily preying on ungulates such as deer and bovids. It is territorial and generally a solitary but social predator, requiring large contiguous areas of habitat, which support its requirements for prey and rearing of its offspring. Tiger cubs stay with their mother for about two years, before they become independent and leave their mother's home range to establish their own.
Temporal range: Early Pleistocene – Present
|Female tiger at the Tadoba Andhari Tiger Reserve|
|Tiger's historical range in about 1850 (pale yellow) and in 2006 (in green).|
The tiger once ranged widely from Eastern Anatolia Region in the west to the Amur River basin, and in the south from the foothills of the Himalayas to Bali in the Sunda islands. Since the early 20th century, tiger populations have lost at least 93% of their historic range and have been extirpated in Western and Central Asia, from the islands of Java and Bali, and in large areas of Southeast and South Asia and China. Today's tiger range is fragmented, stretching from Siberian temperate forests to subtropical and tropical forests on the Indian subcontinent and Sumatra. The tiger is listed as Endangered on the IUCN Red List since 1986. As of 2015, the global wild tiger population was estimated to number between 3,062 and 3,948 mature individuals, down from around 100,000 at the start of the 20th century, with most remaining populations occurring in small pockets isolated from each other. Major reasons for population decline include habitat destruction, habitat fragmentation and poaching. This, coupled with the fact that it lives in some of the more densely populated places on Earth, has caused significant conflicts with humans.
The tiger is among the most recognisable and popular of the world's charismatic megafauna. It featured prominently in ancient mythology and folklore and continues to be depicted in modern films and literature, appearing on many flags, coats of arms and as mascots for sporting teams. The tiger is the national animal of India, Bangladesh, Malaysia and South Korea.
The Middle English tigre and Old English tigras (plural) derive from Old French tigre, from Latin tigris. This was a borrowing of Classical Greek τίγρις (transliterated as tigris, the modern species name), a foreign borrowing of unknown origin meaning "tiger" as well as the river Tigris. The original source may have been Persian tigra (pointed or sharp), and Avestan tigrhi (arrow), perhaps referring to the speed of the tiger's leap, although these words are not known to have any meanings associated with tigers.
The genus name Panthera is traceable to Old French pantère, from Latin panthera, from Ancient Greek panther, most likely with the original meaning "yellowish animal", or from pandarah meaning "whitish-yellow", possibly related to Sanskrit pundarikas (tiger). The derivation from Greek pan- ("all") and ther ("beast") is likely incorrect folk etymology.
Taxonomy and genetics
In 1758, Carl Linnaeus described the tiger in his work Systema Naturae and gave it the scientific name Felis tigris. In 1929, the British taxonomist Reginald Innes Pocock subordinated the species under the genus Panthera using the scientific name Panthera tigris.
The tiger's closest living relatives were previously thought to be the Panthera species lion, leopard and jaguar. Results of genetic analysis indicate that about 2.88 million years ago, the tiger and the snow leopard lineages diverged from the other Panthera species, and that both may be more closely related to each other than to the lion, leopard and jaguar.P. t. palaeosinensis from the Early Pleistocene of northern China is the most primitive known tiger to date.Fossil remains of Panthera zdanskyi were excavated in Gansu province of northwestern China. This species lived at the beginning of the Pleistocene about two million years ago, and is considered to be a sister taxon of the modern tiger. It was about the size of a jaguar and probably had a different coat pattern. Despite being considered more "primitive", it was functionally and possibly also ecologically similar to the modern tiger. Northwestern China is thought to be the origin of the tiger lineage. Tigers grew in size, possibly in response to adaptive radiations of prey species like deer and bovids, which may have occurred in Southeast Asia during the early Pleistocene.
Panthera tigris trinilensis lived about 1.2 million years ago and is known from fossils excavated near Trinil in Java. The Wanhsien, Ngandong, Trinil and Japanese tigers became extinct in prehistoric times. Tigers reached India and northern Asia in the late Pleistocene, reaching eastern Beringia, Japan, and Sakhalin. Some fossil skulls are morphologically distinct from lion skulls, which could indicate tiger presence in Alaska during the last glacial period, about 100,000 years ago.
Tiger fossils found in the island of Palawan were smaller than mainland tiger fossils, possibly due to insular dwarfism. Fossil remains of tigers were also excavated in Sri Lanka, China, Japan, Sarawak dating to the late Pliocene, Pleistocene and Early Holocene. The Bornean tiger was apparently present in Borneo between the Late Pleistocene and the Holocene, but may have gone extinct in prehistoric times.
The potential tiger range during the Late Pleistocene and Holocene was predicted applying ecological niche modelling based on more than 500 tiger locality records combined with bioclimatic data. The resulting model shows a contiguous tiger range from southern India to Siberia at the Last Glacial Maximum, indicating an unobstructed gene flow between tiger populations in mainland Asia throughout the Late Pleistocene and Holocene. The tiger populations on the Sunda Islands and mainland Asia were possibly separated during interglacial periods.
Following Linnaeus's first descriptions of the species, several tiger specimens were described and proposed as subspecies. The validity of several tiger subspecies was questioned in 1999. Most putative subspecies described in the 19th and 20th centuries were distinguished on basis of fur length and coloration, striping patterns and body size, hence characteristics that vary widely within populations. Morphologically, tigers from different regions vary little, and gene flow between populations in those regions is considered to have been possible during the Pleistocene. Therefore, it was proposed to recognize only two tiger subspecies as valid, namely P. t. tigris in mainland Asia, and P. t. sondaica in the Greater Sunda Islands.
Results of craniological analysis of 111 tiger skulls from Southeast Asian range countries indicate that Sumatran tiger skulls differ from Indochinese and Javan tiger skulls, whereas Bali tiger skulls are similar in size to Javan tiger skulls. The authors proposed to classify Sumatran and Javan tiger as distinct species, P. sumatrae and P. sondaica with Bali tiger as subspecies P. sondaica balica.
In 2015, morphological, ecological and molecular traits of all putative tiger subspecies were analysed in a combined approach. Results support distinction of the two evolutionary groups continental and Sunda tigers. The authors proposed recognition of only two subspecies, namely P. t. tigris comprising the Bengal, Malayan, Indochinese, South Chinese, Siberian and Caspian tiger populations, and P. t. sondaica comprising the Sumatran, Javan and Bali tiger populations. The authors also noted that this reclassification will affect tiger conservation management. One conservation specialist welcomed this proposal as it would make captive breeding programmes and future rewilding of zoo-born tigers easier. One geneticist was sceptical of this study and maintained that the currently recognised nine subspecies can be distinguished genetically.
In 2017, the Cat Classification Task Force of the IUCN Cat Specialist Group revised felid taxonomy and now recognizes the tiger populations in continental Asia as P. t. tigris, and those in the Sunda Islands as P. t. sondaica.
The following tables are based on the classification of the species Panthera tigris provided in Mammal Species of the World. It also reflects the classification used by the Cat Classification Task Force in 2017:
|Bengal tiger (P. t. tigris) (Linnaeus, 1758)||The Bengal tiger's coat colour varies from light yellow to reddish yellow with black stripes.
This population occurs in Bangladesh, Bhutan, India, Nepal, foremost in alluvial grasslands, subtropical and tropical rainforests, scrub forests, wet and dry deciduous forests and mangrove habitats. In 2014, the population in India was estimated at 2,226 mature individuals, 163–253 in Nepal and 103 in Bhutan.
|Caspian tiger (P. t. tigris), formerly P. t. virgata (Illiger, 1815)||The Caspian tiger was described as having narrow and closely set stripes. The size of its skull did not differ significantly from that of the Bengal tiger. According to genetic analysis, it was closely related to the Siberian tiger. It had been recorded in the wild until the early 1970s and is considered extinct since the late 20th century.|
|Siberian tiger (P. t. tigris), formerly P. t. altaica (Temminck, 1844)||It has a thick coat with pale hues and few dark brown stripes. It is also known as the Amur tiger.
This population inhabits the Amur-Ussuri region of Primorsky Krai and Khabarovsk Krai in far eastern Siberia, with a small population in Hunchun National Nature Reserve in northeastern China near the border to North Korea. It is extinct in Mongolia, North Korea, and South Korea. As of 2015, the population was estimated at 480-540 mature individuals.
|South China tiger (P. t. tigris), formerly P. t. amoyensis (Hilzheimer, 1905)||The South China tiger is distinguished by a particularly narrow skull, long-muzzled nose, rhombus-like stripes and vivid orange colour; it is considered to be the most ancient of the tiger populations. It was noted to have a unique mtDNA haplotype.
The population is extinct in the wild. Despite unconfirmed reports and some evidence of footprints, there has been no confirmed sighting in China since the early 1970s. As of 2007, the captive population consisted of 73 individuals, which derived from six wild founders.
|Indochinese tiger (P. t. tigris), formerly P. t. corbetti Mazák, 1968||The Indochinese tiger was described as being smaller than the Bengal tiger and as having a smaller skull.
This population lives in Myanmar, Thailand, Laos, but has not been recorded in Vietnam since 1997. In 2010, the population was estimated at about 350 individuals. Tiger populations have declined in key areas and are threatened by illegal production of tiger bone for use in traditional medicine.
|Malayan tiger (P. t. tigris), formerly P. t. jacksoni Luo et al., 2004||It was proposed as a distinct subspecies on the basis of mtDNA and micro-satellite sequences that differs from the Indochinese tiger. There is no clear difference between the Malayan and the Indochinese tiger in pelage or skull size.
The population was roughly estimated at 250 to 340 adult individuals in 2013, and likely comprised less than 200 mature breeding individuals at the time. The geographic division between Malayan and Indochinese tigers is unclear as tiger populations in northern Malaysia are contiguous with those in southern Thailand. The last tiger in Singapore was shot in 1932; the species is considered extirpated there since the 1950s.
|Javan tiger (P. t. sondaica) (Temminck, 1844)||The Javan tiger was small compared to tigers of the Asian mainland.
This population was limited to the Indonesian island of Java, and had been recorded until the mid-1970s. After 1979, no more sightings were confirmed in the region of Mount Betiri. An expedition to Mount Halimun Salak National Park in 1990 did not yield any definite, direct evidence for the continued existence of tigers.
|Bali tiger (P. t. sondaica), formerly P. t. balica (Schwarz, 1912)||The Bali tiger was the smallest tiger and limited to the Indonesian island of Bali. A typical feature of Bali tiger skulls is the narrow occipital plane, which is analogous with the shape of skulls of Javan tigers.
The last Bali tiger, an adult female, is thought to have been killed at Sumbar Kima, West Bali, on 27 September 1937, though there were unconfirmed reports that villagers found a tiger corpse in 1963.
|Sumatran tiger (P. t. sondaica), formerly P. t. sumatrae Pocock, 1929||It is the smallest of all living tigers. The reasons for its small size compared to mainland tigers are unclear, but probably the result of competition for limited and small prey. The population is thought to be of Asia mainland origin and to have been isolated about 6,000 to 12,000 years ago after a rise in sea-level created the Indonesian island of Sumatra.
The population is the last surviving of the three Indonesian island tiger populations. By 2008, it was estimated at between 441 and 679 in 10 protected areas covering about 52,000 km2 (20,000 sq mi). It was listed as Critically Endangered on the IUCN Red List.
Captive tigers were bred with lions to create hybrids called liger and tigon. They share physical and behavioural qualities of both parent species. Breeding hybrids is now discouraged due to the emphasis on conservation. The liger is a cross between a male lion and a tigress. Ligers are typically between 10 and 12 ft (3.0 and 3.7 m) in length, and weigh between 800 and 1,000 lb (360 and 450 kg) or more. Because the lion sire passes on a growth-promoting gene, but the corresponding growth-inhibiting gene from the female tiger is absent, ligers grow far larger than either parent species.
The less common tigon is a cross between a lioness and a male tiger. Because the male tiger does not pass on a growth-promoting gene and the lioness passes on a growth inhibiting gene, tigons are around the same size as their parents. Some females are fertile and have occasionally given birth to litigons when mated to a male Asiatic lion.
The tiger has a muscular body with powerful forelimbs, a large head and a tail that is about half the length of its body. Its pelage is dense and heavy, and colouration varies between shades of orange and brown with white ventral areas and distinctive vertical black stripes that are unique in each individual. Stripes are likely advantageous for camouflage in vegetation such as long grass with strong vertical patterns of light and shade. The tiger is one of only a few striped cat species; it is not known why spotted patterns and rosettes are the more common camouflage pattern among felids. A tiger's coat pattern is still visible when it is shaved. This is not due to skin pigmentation, but to the stubble and hair follicles embedded in the skin, similar to human beards (colloquially five o'clock shadow), and is in common with other big cats. They have a mane-like heavy growth of fur around the neck and jaws and long whiskers, especially in males. The pupils are circular with yellow irises. The small, rounded ears have a prominent white spot on the back, surrounded by black. These false "eyespots", called ocelli, apparently play an important role in intraspecific communication.
The tiger's skull is similar to a lion's skull, with the frontal region usually less depressed or flattened, and a slightly longer postorbital region. The lion skull shows broader nasal openings. Due to the variation in skull sizes of the two species, the structure of the lower jaw is a reliable indicator for their identifcation. The tiger has fairly stout teeth; its somewhat curved canines are the longest among living felids with a crown height of up to 90 mm (3.5 in).
There is a notable sexual dimorphism between males and females, with the latter being consistently smaller than males. The size difference between males and females is proportionally greater in the large tiger subspecies, with males weighing up to 1.7 times more than females. Males also have wider forepaw pads than females, enabling gender to be told from tracks. It has been hypothesised that body size of different tiger populations may be correlated with climate and be explained by thermoregulation and Bergmann's rule, or by distribution and size of available prey species.
Generally, males vary in total length from 250 to 390 cm (8.2 to 12.8 ft) and weigh between 90 and 306 kg (198 and 675 lb) with skull length ranging from 316 to 383 mm (12.4 to 15.1 in). Females vary in total length from 200 to 275 cm (6.56 to 9.02 ft), weigh 65 to 167 kg (143 to 368 lb) with skull length ranging from 268 to 318 mm (0.879 to 1.043 ft). In either sex, the tail represents about 0.6 to 1.1 m (24 to 43 in) of total length. The Bengal and Siberian tigers are amongst the tallest cats in shoulder height. They are also ranked among the biggest cats that have ever existed. The tigers of the Sunda islands are smaller and less heavy than tigers in mainland Asia, rarely exceeding of 142 kg (313 lb) in weight.
Large male Siberian tigers reach a total length of more than 3.5 m (11.5 ft) over curves and 3.3 m (10.8 ft) between the pegs, with a weight of up to at least 300 kg (660 lb). This is considerably larger than the weight of 75 to 140 kg (165 to 309 lb) reached by the Sumatran tiger. At the shoulder, tigers may variously stand 0.7 to 1.22 m (2.3 to 4.0 ft) tall. Bengal tiger males attain a total nose-to-tail length of 270 to 310 cm (110 to 120 in) and weigh between 180 to 258 kg (397 to 569 lb), while females range from 240 to 265 cm (94 to 104 in) and 100 to 160 kg (220 to 350 lb). In northern India and Nepal, the average is larger; males weigh up to 235 kg (518 lb), while females average 140 kg (310 lb). Recorded body weights of wild individuals indicate that they are heavier than wild Siberian tigers.
The largest wild tiger ever reported had a total body length of 3.38 m (11.1 ft) over curves. The heaviest captive tiger was a Siberian tiger at 465 kg (1,025 lb). The heaviest wild tiger on record was a Bengal tiger from north India which was shot in 1967. It allegedly weighed 388.7 kg (857 lb), though it should be noted that it had a heavy meal before it was killed, without which it would have weighed significantly less. The longest tiger skull was 16.25 in (413 mm) measured "over the bone"; this individual was shot in 1927 in northern India.
The white tiger lacks yellow pigments, has dark sepia-brown stripes and blue eyes. This altered pigmentation is caused by a mutant gene that is inherited as an autosomal recessive. It is not an albino, as the black pigments are scarcely affected. The mutation changes a single amino acid in the transporter protein SLC45A2. Both parents need to have the allele for whiteness to have white cubs. Between the early and mid 20th century, white tigers were recorded and shot in the Indian states of Odisha, Bihar, Assam and in the area of Rewa, Madhya Pradesh. The local maharaja started breeding tigers in the early 1950s and kept a white male tiger together with its normal-coloured daughter; they had white cubs. To preserve this recessive trait, only a few white individuals were used in captive breeding, which lead to a high degree of inbreeding. Inbreeding depression is the main reason for many health problems of captive white tigers, including strabismus, stillbirth, deformities and premature death. Other physical defects include cleft palate and scoliosis.
True albino tigers do exist and may be termed "snow white" tigers. In this colour morph, the stripes are extremely faint on the body while the tail has pale reddish-brown rings. Golden tigers, another colour morph, have pale golden pelage with a blond tone and reddish-brown stripes. These types are rarely recorded in the wild. Both snow white and golden tiger are homozygous for the CORIN gene.
Distribution and habitat
The tiger once ranged widely across Asia from eastern Turkey and Transcaucasia to the Altai Mountains, Lake Baikal and the coast of the Sea of Japan, and in the south from the Indian subcontinent across Southeast Asia to the Sunda islands of Sumatra, Java and Bali. Since the end of the last glacial period about 20,000 years ago, its distribution in the northern range countries was probably restricted by periods of deep snow lasting longer than six months. It is essentially associated with forest habitats. Its distribution is closely tied to distribution and density of ungulate species. Tiger populations thrive where populations of wild cervids, bovids and suids are stable.
About a dozen known historical records from Turkey indicate that the tiger occurred only in remote areas of eastern Anatolia, possibly until the late 20th century. In Iraq, a tiger was shot near Mosul in 1887. This individual was probably a migrant from southeastern Turkey, as this is the only confirmed record in the country. In the Caucasus, the tiger inhabited hilly and lowland forests. Historical records in Iran are known only from the southern coast of the Caspian Sea and adjacent Alborz Mountains. Records in Central Asia indicate that the tiger occurred foremost in Tugay riverine forests along the Atrek, Amu Darya, Syr Darya, Hari, Chu and Ili Rivers and their tributaries. In 2003, it has been assessed as regionally extinct in West and Central Asia since the late 20th century, as the last tiger was sighted in this region in the early 1970s.
In East Asia, the tiger inhabits Korean pine and temperate broadleaf and mixed forests in the Russian Far East. Riparian forests are important habitats for both ungulates and tigers as they provide food and water, and serve as dispersal corridors. In China, the tiger became the target of large-scale ‘anti-pest’ campaigns in the early 1950s. Tiger hunting coupled with deforestation, probable decreasing availability of prey and resettlement of people to rural areas lead to fragmentation of tiger habitat. Though tiger hunting was prohibited in 1977, the population continued to decline. No tiger was recorded during field surveys in 2001 in eight protected areas in the country. In northeastern China's Hunchun National Nature Reserve, camera-traps recorded a tiger with four cubs for the first time in 2012. During subsequent surveys, between 27 and 34 tigers were documented along the China-Russian border. There is no evidence for tiger presence in any other Chinese province. It is considered possibly extinct on the Korean peninsula.
Forest cover in Vietnam has been reduced to less than 15% of the original extent before the 1940s, due to warfare, illegal logging, and slash and burn agricultural practises. The tiger is legally protected in the country since 1960, but trade of tiger body parts continued to the mid 1990s. Tigers were still present in northern Vietnam bordering China in the 1990s. As of 2015, this population is considered possibly extinct. In Laos, National Biodiversity Conservation Areas were established in 1993. At the time, the country’s tiger population was already depleted. By the late 1990s, tigers were still present in at least five conservation areas. Hunting of tigers for illegal trade of body parts and opportunistic hunting of tiger prey species were considered the main threats to the country's tiger population. Five individual tigers were recorded in Nam Et-Phou Louey National Protected Area during a camera-trapping survey between April 2003 and June 2004. Large wild prey species occurred at low densities so that tigers hunted small prey and livestock, which probably affected their reproduction negatively. In Cambodia, tigers were still sighted in remote forest areas in the mid 1980s. Protected areas were established in 1993, but large extents of forest outside these areas were given as logging concessions to foreign companies. An interview survey conducted among hunters in spring 1998 revealed tiger presence in nine areas including the Cardamom and Dâmrei Mountains. During camera-trapping surveys carried out between 1999 and 2007 in nine protected areas and more than 300 locations across the country, tigers were recorded only in the Mondulkiri Protected Forest and in Virachey National Park. The country's tiger population was therefore considered extremely small. As of 2015, it is considered possibly extinct. In Thailand, forests were protected by establishing 81 national parks, 39 wildlife sanctuaries and 49 non-hunting areas between 1962 and 1996, including 12 protected areas exceeding 1,000 km2 (390 sq mi). Logging was banned in 1989. Despite this extensive protected area network, tigers were recorded in 10 of 17 protected area complexes during countrywide surveys between 2004 and 2007. Tiger density was lower than predicted on basis of available forest habitat. The Myanmar tiger population was limited to the Tanintharyi Region and Hukawng Valley Tiger Reserve in 2006. In Peninsular Malaysia, tigers occur only in four protected areas that are larger than 400 km2 (150 sq mi). In Sumatra, tiger populations range from lowland peat swamp forests to rugged montane forests.
On the Indian subcontinent, fragmented tiger populations inhabit the Sundarbans, protected areas of the Brahmaputra River basin and the Indian and Nepal Terai. In the Himalayan foothills, tigers range to over 3,500 m (11,500 ft) in Bhutan's temperate forests. By 2007, India's Project Tiger program included 37 tiger reserves covering about 37,700 sq mi (98,000 km2).
Biology and behaviour
Social and daily activities
When not subject to human disturbance, the tiger is mainly diurnal. It does not often climb trees but cases have been recorded. It is a strong swimmer and often bathes in ponds, lakes and rivers, thus keeping cool in the heat of the day. Individuals can cross rivers up to 7 km (4.3 mi) wide and can swim up to 29 km (18 mi) in a day. During the 1980s, a tiger was observed frequently hunting prey through deep lake water in Ranthambhore National Park.
The tiger is a long-ranging species, and individuals disperse over distances of up to 650 km (400 mi) to reach tiger populations in other areas. Radio-collared tigers in Chitwan National Park started dispersing from their natal areas earliest at the age of 19 months. Four females dispersed between 0 and 43.2 km (0.0 and 26.8 mi), and 10 males between 9.5 and 65.7 km (5.9 and 40.8 mi). None of them crossed open cultivated areas that were more than 10 km (6.2 mi) wide, but moved through forested habitat.
Adult tigers lead largely solitary lives. They establish and maintain territories but have much wider home ranges within which they roam. Resident adults of either sex generally confine their movements to their home ranges, within which they satisfy their needs and those of their growing cubs. Individuals sharing the same area are aware of each other's movements and activities. The size of the home range mainly depends on prey abundance, geographic area and sex of the individual. In India, home ranges appear to be 50 to 1,000 km2 (19 to 386 sq mi) while in Manchuria, they range from 500 to 4,000 km2 (190 to 1,540 sq mi). In Nepal, defended territories are recorded to be 19 to 151 km2 (7.3 to 58.3 sq mi) for males and 10 to 51 km2 (3.9 to 19.7 sq mi) for females.
Young female tigers establish their first territories close to their mother's. The overlap between the female and her mother's territory reduces with time. Males, however, migrate further than their female counterparts and set out at a younger age to mark out their own area. A young male acquires territory either by seeking out an area devoid of other male tigers, or by living as a transient in another male's territory until he is older and strong enough to challenge the resident male. Young males seeking to establish themselves thereby comprise the highest mortality rate (30–35% per year) amongst adult tigers.
To identify his territory, the male marks trees by spraying urine and anal gland secretions, as well as marking trails with scat and marking trees or the ground with their claws. Females also use these "scrapes", as well as urine and scat markings. Scent markings of this type allow an individual to pick up information on another's identity, sex and reproductive status. Females in oestrus will signal their availability by scent marking more frequently and increasing their vocalisations.
Although for the most part avoiding each other, tigers are not always territorial and relationships between individuals can be complex. An adult of either sex will sometimes share its kill with others, even those who may not be related to them. George Schaller observed a male share a kill with two females and four cubs. Unlike male lions, male tigers allow females and cubs to feed on the kill before the male is finished with it; all involved generally seem to behave amicably, in contrast to the competitive behaviour shown by a lion pride. Stephen Mills described a social feeding event in Ranthambhore National Park:
A dominant tigress they called Padmini killed a 250 kg (550 lb) male nilgai – a very large antelope. They found her at the kill just after dawn with her three 14-month-old cubs, and they watched uninterrupted for the next ten hours. During this period the family was joined by two adult females and one adult male, all offspring from Padmini's previous litters, and by two unrelated tigers, one female the other unidentified. By three o'clock there were no fewer than nine tigers round the kill.
Occasionally, male tigers participate in raising cubs, usually their own, but this is extremely rare and not always well understood. In May 2015, Amur tigers were photographed by camera traps in the Sikhote-Alin Bioshpere Reserve. The photos show a male Amur tiger pass by, followed by a female and three cubs within the span of about two minutes. In Ranthambore, a male Bengal tiger raised and defended two orphaned female cubs after their mother had died of illness. The cubs remained under his care, he supplied them with food, protected them from his rival and sister, and apparently also trained them.
Male tigers are generally more intolerant of other males within their territories than females are of other females. Territory disputes are usually solved by displays of intimidation rather than outright aggression. Several such incidents have been observed in which the subordinate tiger yielded defeat by rolling onto its back and showing its belly in a submissive posture. Once dominance has been established, a male may tolerate a subordinate within his range, as long as they do not live in too close quarters. The most aggressive disputes tend to occur between two males when a female is in oestrus, and sometimes resulted in the death of one of the males.
Facial expressions include the "defense threat", where an individual bares its teeth, flattens its ears and its pupils enlarge. Both males and females show a flehmen response, a characteristic grimace, when sniffing urine markings but flehmen is more often associated with males detecting the markings made by tigresses in oestrus. Like other Panthera, tigers roar, particularly in aggressive situations, during the mating season or when making a kill. There are two different roars: the "true" roar is made using the hyoid apparatus and forced through an open mouth as it progressively closes, and the shorter, harsher "coughing" roar is made with the mouth open and teeth exposed. The "true" roar can be heard at up to 3 km (1.9 mi) away and is sometimes emitted three or four times in succession. When tense, tigers will moan, a sound similar to a roar but more subdued and made when the mouth is partially or completely closed. Moaning can be heard 400 m (1,300 ft) away. Chuffing—soft, low-frequency snorting similar to purring in smaller cats—is heard in more friendly situations. Other vocal communications include grunts, woofs, snarls, miaows, hisses and growls.
Hunting and diet
In the wild, tigers mostly feed on large and medium-sized animals, preferring ungulates weighing at least 90 kg (200 lb). They typically have little or no deleterious effect on their prey populations. Sambar deer, chital, barasingha, wild boar, gaur, nilgai and both water buffalo and domestic buffalo are the tiger's prey in India. Like many predators, tigers are opportunistic and may eat much smaller prey, such as monkeys, peafowl and other ground-based birds, hares, porcupines, and fish. They also prey on other predators, including dogs, leopards, pythons, sloth bears, and crocodiles. Although almost exclusively carnivorous, tigers will occasionally eat vegetation for dietary fibre such as fruit of the slow match tree.
In Siberia, the main prey species are Manchurian wapiti and wild boar (the two species comprising nearly 80% of the prey selected) followed by sika deer, moose, roe deer, and musk deer. Asiatic black bears and Ussuri brown bears may also fall prey to tigers, and they constitute up to 40.7% of the diet of Siberian tigers depending on local conditions and the bear populations. In Sumatra, prey include sambar deer, muntjac, wild boar, Malayan tapir and orangutan. Whilst hunting sambars, which comprise up to 60% of their prey in India, tigers have reportedly made a passable impersonation of the male sambar's rutting call to attract them.
Tigers generally do not prey on fully grown adult Asian elephants and Indian rhinoceros but incidents have been reported. More often, it is the more vulnerable small calves that are taken. However, occasionally adult rhinoceros have in fact fallen victims to tigers, as has been documented in at least three separate incidents. Tigers have been reported attacking and killing elephants ridden by humans during tiger hunts in the 19th century. When in close proximity to humans, tigers will also sometimes prey on such domestic livestock as cattle, horses, and donkeys. Old or wounded tigers, unable to catch wild prey, can become man-eaters; this pattern has recurred frequently across India. An exception is in the Sundarbans, where healthy tigers prey upon fishermen and villagers in search of forest produce, humans thereby forming a minor part of the tiger's diet.
Tigers are thought to be mainly nocturnal predators, but in areas where humans are absent, remote-controlled, hidden camera traps recorded them hunting in daylight. They generally hunt alone and ambush their prey as most other cats do, overpowering them from any angle, using their body size and strength to knock the prey off balance. Successful hunts usually require the tiger to almost simultaneously leap onto its quarry, knock it over, and grab the throat or nape with its teeth. Despite their large size, tigers can reach speeds of about 49–65 km/h (30–40 mph) but only in short bursts; consequently, tigers must be close to their prey before they break cover. If the prey catches wind of the tiger's presence before this, the tiger usually abandons the hunt rather than chase prey or battle it head-on. Horizontal leaps of up to 10 m (33 ft) have been reported, although leaps of around half this distance are more typical. One in 2 to 20 hunts, including stalking near potential prey, ends in a successful kill.
When hunting larger animals, tigers prefer to bite the throat and use their powerful forelimbs to hold onto the prey, often simultaneously wrestling it to the ground. The tiger remains latched onto the neck until its target dies of strangulation. By this method, gaurs and water buffaloes weighing over a ton have been killed by tigers weighing about a sixth as much. Although they can kill healthy adults, tigers often select the calves or infirm of very large species. Healthy adult prey of this type can be dangerous to tackle, as long, strong horns, legs and tusks are all potentially fatal to the tiger. No other extant land predator routinely takes on prey this large on its own.
With smaller prey, such as monkeys and hares, the tiger bites the nape, often breaking the spinal cord, piercing the windpipe, or severing the jugular vein or common carotid artery. Though rarely observed, some tigers have been recorded to kill prey by swiping with their paws, which are powerful enough to smash the skulls of domestic cattle, and break the backs of sloth bears.
After killing their prey, tigers sometimes drag it to conceal it in vegetative cover, usually pulling it by grasping with their mouths at the site of the killing bite. This, too, can require great physical strength. In one case, after it had killed an adult gaur, a tiger was observed to drag the massive carcass over a distance of 12 m (39 ft). When 13 men simultaneously tried to drag the same carcass later, they were unable to move it. An adult tiger can go for up to two weeks without eating, then gorge on 34 kg (75 lb) of flesh at one time. In captivity, adult tigers are fed 3 to 6 kg (6.6 to 13.2 lb) of meat a day.
Enemies and competitors
Tigers usually prefer to eat prey they have caught themselves, but are not above eating carrion in times of scarcity and may even pirate prey from other large carnivores. Although predators typically avoid one another, if a prey item is under dispute or a serious competitor is encountered, displays of aggression are common. If these are not sufficient, the conflicts may turn violent; tigers may kill competitors as leopards, dholes, striped hyenas, wolves, bears, pythons, and crocodiles on occasion. Tigers may also prey on these competitors. Attacks on smaller predators, such as badgers, lynxes, and foxes, are almost certainly predatory. Crocodiles, bears, and large packs of dholes may win conflicts against tigers and in some cases even kill them.
The considerably smaller leopard avoids competition from tigers by hunting at different times of the day and hunting different prey. In India's Nagarhole National Park, most prey selected by leopards were from 30 to 175 kg (66 to 386 lb) against a preference for prey weighing over 176 kg (388 lb) in the tigers. The average prey weight in the two respective big cats in India was 37.6 kg (83 lb) against 91.5 kg (202 lb). With relatively abundant prey, tigers and leopards were seen to successfully coexist without competitive exclusion or interspecies dominance hierarchies that may be more common to the African savanna, where the leopard exists with the lion. Golden jackals may feed on the tiger's kills. Tigers appear to inhabit the deep parts of a forest while smaller predators like leopards and dholes are pushed closer to the fringes.
The tiger mates all year round, but most cubs are born between March and June, with a second peak in September. Gestation ranges from 93 to 114 days, with an average of 103 to 105 days. A female is only receptive for three to six days. Mating is frequent and noisy during that time. The female gives birth in a sheltered location such as in tall grass, in a dense thicket, cave or rocky crevice. The father generally takes no part in rearing. Litters consist of two or three cubs, rarely as many as six. Cubs weigh from 780 to 1,600 g (1.72 to 3.53 lb) each at birth, and are born with eyes closed. They open their eyes when they are six to 14 days old. Their milk teeth break through at the age of about two weeks. They start to eat meat at the age of eight weeks. At around this time, females usually shift them to a new den. They make short ventures with their mother, although they do not travel with her as she roams her territory until they are older. Females lactate for five to six months. Around the time they are weaned, they start to accompany their mother on territorial walks and are taught how to hunt.
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A dominant cub emerges in most litters, usually a male. The dominant cub is more active than its siblings and takes the lead in their play, eventually leaving its mother and becoming independent earlier. The cubs start hunting on their own earliest at the age of 11 months, and become independent around 18 to 20 months of age. They separate from their mother at the age of two to two and a half years, but continue to grow until the age of five years. Young females reach sexual maturity at three to four years, whereas males at four to five years. Unrelated wandering male tigers often kill cubs to make the female receptive, since the tigress may give birth to another litter within five months if the cubs of the previous litter are lost. The mortality rate of tiger cubs is about 50% in the first two years. Few other predators attack tiger cubs due to the diligence and ferocity of the mother. Apart from humans and other tigers, common causes of cub mortality are starvation, freezing, and accidents.
In the 1990s, a new approach to tiger conservation was developed: Tiger Conservation Units (TCUs), which are blocks of habitat that have the potential to host tiger populations in 15 habitat types within five bioregions. Altogether 143 TCUs were identified and prioritized based on size and integrity of habitat, poaching pressure and population status. They range in size from 33 to 155,829 km2 (13 to 60,166 sq mi).
In 2016, an estimate of a global wild tiger population of approximately 3,890 individuals was presented during the Third Asia Ministerial Conference on Tiger Conservation. The WWF subsequently declared that the world's count of wild tigers had risen for the first time in a century.
Major threats to the tiger include habitat destruction, habitat fragmentation and poaching for fur and body parts, which have simultaneously greatly reduced tiger populations in the wild. In India, only 11% of the historical tiger habitat remains due to habitat fragmentation. Demand for tiger parts for use in traditional Chinese medicine has also been cited as a major threat to tiger populations. At the start of the 20th century, it was estimated there were over 100,000 tigers in the wild, but the population has dwindled outside of captivity to between 1,500 and 3,500. Some estimates suggest that there are fewer than 2,500 mature breeding individuals, with no subpopulation containing more than 250 mature breeding individuals. The global wild tiger population was estimated by the World Wide Fund for Nature at 3,200 in 2011 and 3,890 in 2015—Vox reported that this was the first increase in a century.
India is home to the world's largest population of wild tigers. A 2014 census estimated a population of 2,226, a 30% increase since 2011. In 1973, India's Project Tiger, started by Indira Gandhi, established numerous tiger reserves. The project was credited with tripling the number of wild Bengal tigers from some 1,200 in 1973 to over 3,500 in the 1990s, but a 2007 census showed that numbers had dropped back to about 1,400 tigers because of poaching. Following the report, the Indian government pledged $153 million to the initiative, set up measures to combat poaching, promised funds to relocate up to 200,000 villagers in order to reduce human-tiger interactions, and set up eight new tiger reserves. India also reintroduced tigers to the Sariska Tiger Reserve and by 2009 it was claimed that poaching had been effectively countered at Ranthambore National Park.
In the 1940s, the Siberian tiger was on the brink of extinction with only about 40 animals remaining in the wild in Russia. As a result, anti-poaching controls were put in place by the Soviet Union and a network of protected zones (zapovedniks) were instituted, leading to a rise in the population to several hundred. Poaching again became a problem in the 1990s, when the economy of Russia collapsed. The major obstacle in preserving the species is the enormous territory individual tigers require (up to 450 km2 needed by a single female and more for a single male). Current conservation efforts are led by local governments and NGO's in concert with international organisations, such as the World Wide Fund for Nature and the Wildlife Conservation Society. The competitive exclusion of wolves by tigers has been used by Russian conservationists to convince hunters to tolerate the big cats. Tigers have less impact on ungulate populations than do wolves, and are effective in controlling the latter's numbers. In 2005, there were thought to be about 360 animals in Russia, though these exhibited little genetic diversity. However, in a decade later, the Siberian tiger census was estimated from 480 to 540 individuals.
Having earlier rejected the Western-led environmentalist movement, China changed its stance in the 1980s and became a party to the CITES treaty. By 1993 it had banned the trade in tiger parts, and this diminished the use of tiger bones in traditional Chinese medicine. The Tibetan people's trade in tiger skins has also been a threat to tigers. The pelts were used in clothing, tiger-skin chuba being worn as fashion. In 2006 the 14th Dalai Lama was persuaded to take up the issue. Since then there has been a change of attitude, with some Tibetans publicly burning their chubas.
In 1994, the Indonesian Sumatran Tiger Conservation Strategy addressed the potential crisis that tigers faced in Sumatra. The Sumatran Tiger Project (STP) was initiated in June 1995 in and around the Way Kambas National Park in order to ensure the long-term viability of wild Sumatran tigers and to accumulate data on tiger life-history characteristics vital for the management of wild populations. By August 1999, the teams of the STP had evaluated 52 sites of potential tiger habitat in Lampung Province, of which only 15 these were intact enough to contain tigers. In the framework of the STP a community-based conservation programme was initiated to document the tiger-human dimension in the park in order to enable conservation authorities to resolve tiger-human conflicts based on a comprehensive database rather than anecdotes and opinions.
The Wildlife Conservation Society and Panthera Corporation formed the collaboration Tigers Forever, with field sites including the world's largest tiger reserve, the 21,756 km2 (8,400 sq mi) Hukaung Valley in Myanmar. Other reserves were in the Western Ghats in India, Thailand, Laos, Cambodia, the Russian Far East covering in total about 260,000 km2 (100,000 sq mi).
Tigers have been studied in the wild using a variety of techniques. Tiger population have been estimated using plaster casts of their pugmarks, although this method was criticized as being inaccurate. More recent techniques include the use of camera traps and studies of DNA from tiger scat, while radio-collaring has been used to track tigers in the wild. Tiger spray has been found to be just as good, or better, as a source of DNA than scat.
The exact number of wild tigers is unknown, as many estimates are outdated or educated guesses; few estimates are based on reliable scientific censuses. The table shows estimates according to IUCN Red List accounts and range country governments dating from 2009 to April 2016.
Rewilding and reintroduction projects
In 1978, the Indian conservationist Billy Arjan Singh attempted to rewild a tiger in Dudhwa National Park; this was the captive-bred tigress Tara. Soon after the release, numerous people were killed and eaten by a tigress that was subsequently shot. Government officials claimed it was Tara, though Singh disputed this. Further controversy broke out with the discovery that Tara was partly Siberian tiger.
The organisation Save China's Tigers has attempted to rewild the South China tigers, with a breeding and training programme in a South African reserve known as Laohu Valley Reserve (LVR) and eventually reintroduce them to the wild of China.
A future rewilding project was proposed for Siberian tigers set to be reintroduced to northern Russia's Pleistocene park. The Siberian tigers sent to Iran for a captive breeding project in Tehran are set to be rewilded and reintroduced to the Miankaleh peninsula, to replace the now extinct Caspian tigers.
Relation with humans
The tiger has been one of the big five game animals of Asia. Tiger hunting took place on a large scale in the early 19th and 20th centuries, being a recognised and admired sport by the British in colonial India as well as the maharajas and aristocratic class of the erstwhile princely states of pre-independence India. A single maharaja or English hunter could claim to kill over a hundred tigers in their hunting career. Tiger hunting was done by some hunters on foot; others sat up on machans with a goat or buffalo tied out as bait; yet others on elephant-back.
Historically, tigers have been hunted at a large scale so their famous striped skins could be collected. The trade in tiger skins peaked in the 1960s, just before international conservation efforts took effect. By 1977, a tiger skin in an English market was considered to be worth US$4,250.
Many people in China and other parts of Asia have a belief that various tiger parts have medicinal properties, including as pain killers and aphrodisiacs. There is no scientific evidence to support these beliefs. The use of tiger parts in pharmaceutical drugs in China is already banned, and the government has made some offences in connection with tiger poaching punishable by death.[which?] Furthermore, all trade in tiger parts is illegal under the Convention on International Trade in Endangered Species of Wild Fauna and Flora and a domestic trade ban has been in place in China since 1993.
However, the trading of tiger parts in Asia has become a major black market industry and governmental and conservation attempts to stop it have been ineffective to date. Almost all black marketers engaged in the trade are based in China and have either been shipped and sold within in their own country or into Taiwan, South Korea or Japan. The Chinese subspecies was almost completely decimated by killing for commerce due to both the parts and skin trades in the 1950s through the 1970s. Contributing to the illegal trade, there are a number of tiger farms in the country specialising in breeding the cats for profit. It is estimated that between 5,000 and 10,000 captive-bred, semi-tame animals live in these farms today. However, many tigers for traditional medicine black market are wild ones shot or snared by poachers and may be caught anywhere in the tiger's remaining range (from Siberia to India to the Malay Peninsula to Sumatra). In the Asian black market, a tiger penis can be worth the equivalent of around $300 U.S. dollars. In the years of 1990 through 1992, 27 million products with tiger derivatives were found. In July 2014 at an international convention on endangered species in Geneva, Switzerland, a Chinese representative admitted for the first time his government was aware trading in tiger skins was occurring in China.
Wild tigers that have had no prior contact with humans actively avoid interactions with humans. However, tigers cause more human deaths through direct attack than any other wild mammal. Attacks are occasionally provoked, as tigers lash out after being injured while they themselves are hunted. Attacks can be provoked accidentally, as when a human surprises a tiger or inadvertently comes between a mother and her young, or as in a case in rural India when a postman startled a tiger, used to seeing him on foot, by riding a bicycle. Occasionally tigers come to view people as prey. Such attacks are most common in areas where population growth, logging, and farming have put pressure on tiger habitats and reduced their wild prey. Most man-eating tigers are old, missing teeth, and unable to capture their preferred prey. For example, the Champawat Tiger, a tigress found in Nepal and then India, had two broken canines. She was responsible for an estimated 430 human deaths, the most attacks known to be perpetrated by a single wild animal, by the time she was shot in 1907 by Jim Corbett. According to Corbett, tiger attacks on humans are normally in daytime, when people are working outdoors and are not keeping watch. Early writings tend to describe man-eating tigers as cowardly because of their ambush tactics.
Man-eaters have been a particular problem in recent decades in India and Bangladesh, especially in Kumaon, Garhwal and the Sundarbans mangrove swamps of Bengal, where some healthy tigers have hunted humans. Because of rapid habitat loss attributed to climate change, tiger attacks have increased in the Sundarbans. The Sundarbans area had 129 human deaths from tigers from 1969 to 1971. In the 10 years prior to that period, about 100 attacks per year in the Sundarbans, with a high of around 430 in some years of the 1960s. Unusually, in some years in the Sundarbans, more humans are killed by tigers than vice versa. In 1972, India's production of honey and beeswax dropped by 50% when at least 29 people who gathered these materials were devoured. In 1986 in the Sundarbans, since tigers almost always attack from the rear, masks with human faces were worn on the back of the head, on the theory that tigers usually do not attack if seen by their prey. This decreased the number of attacks only temporarily. All other means to prevent attacks, such as providing more prey or using electrified human dummies, worked less well.
In 2018, Indian authorities used the perfume Obsession by Calvin Klein, containing musk, to attempt to attract and thus trap a wild tiger, called 'T-1', that had attacked and killed more than a dozen humans. Ultimately, the tiger was killed in self-defence, after charging those attempting to tranquilise her.
In some cases, rather than being predatory, tiger attacks on human seem to be territorial in nature. At least in one case, a tigress with cubs killed eight people entering her territory without consuming them at all.
In Ancient Roman times, tigers were kept in menageries and amphitheatres to be exhibited, trained and paraded, and were often provoked to fight humans and exotic beasts. Since the 17th century, tigers, being rare and ferocious, were sought after to keep at European castles as symbols of their owners' power. Tigers became central zoo and circus exhibits in the 18th century: a tiger could cost up to 4,000 francs in France (for comparison, a professor of the Beaux-Arts at Lyons earned only 3,000 francs a year), or up to $3,500 in the United States, where a lion cost no more than $1,000.
China (2007) had over 4,000 captive tigers, of which 3,000 were held by about twenty larger facilities, with the rest held by some 200 smaller facilities. The USA (2011) had 2,884 tigers in 468 facilities. Nineteen states have banned private ownership of tigers, fifteen require a license, and sixteen states have no regulation. Genetic ancestry of 105 captive tigers from fourteen countries and regions showed that forty-nine animals belonged distinctly to five subspecies; fifty-two animals had mixed subspecies origins. As such, "many Siberian tigers in zoos today are actually the result of crosses with Bengal tigers."
The Tiger Species Survival Plan has condemned the breeding of white tigers, alleging they are of mixed ancestry and of unknown lineage. The genes responsible for white colouration are represented by 0.001% of the population. The disproportionate growth in numbers of white tigers points to inbreeding among homozygous recessive individuals. This would lead to inbreeding depression and loss of genetic variability.
Tigers and their superlative qualities have been a source of fascination for mankind since ancient times, and they are routinely visible as important cultural and media motifs. They are also considered one of the charismatic megafauna, and are used as the face of conservation campaigns worldwide. In a 2004 online poll conducted by cable television channel Animal Planet, involving more than 50,000 viewers from 73 countries, the tiger was voted the world's favourite animal with 21% of the vote, narrowly beating the dog.
Myth and legend
In Chinese myth and culture, the tiger is one of the 12 animals of the Chinese zodiac. In Chinese art, the tiger is depicted as an earth symbol and equal rival of the Chinese dragon – the two representing matter and spirit respectively. The Southern Chinese martial art Hung Ga is based on the movements of the tiger and the crane. In Imperial China, a tiger was the personification of war and often represented the highest army general (or present day defense secretary), while the emperor and empress were represented by a dragon and phoenix, respectively. The White Tiger (Chinese: 白虎; pinyin: Bái Hǔ) is one of the Four Symbols of the Chinese constellations. It is sometimes called the White Tiger of the West (Chinese: 西方白虎), and it represents the west and the autumn season.
The tiger's tail appears in stories from countries including China and Korea, it being generally inadvisable to grasp a tiger by the tail. In Korean myth and culture, the tiger is regarded as a guardian that drives away evil spirits and a sacred creature that brings good luck – the symbol of courage and absolute power. For the people who live in and around the forests of Korea, the tiger considered the symbol of the Mountain Spirit or King of mountain animals. So, Koreans also called the tigers "San Gun" (산군) means Mountain Lord.
In Buddhism, the tiger is one of the Three Senseless Creatures, symbolising anger, with the monkey representing greed and the deer lovesickness. The Tungusic peoples considered the Siberian tiger a near-deity and often referred to it as "Grandfather" or "Old man". The Udege and Nanai called it "Amba". The Manchu considered the Siberian tiger as "Hu Lin," the king. In Hinduism, the god Shiva wears and sits on tiger skin. The ten-armed warrior goddess Durga rides the tigress (or lioness) Damon into battle. In southern India the god Ayyappan was associated with a tiger.
The weretiger replaces the werewolf in shapeshifting folklore in Asia; in India they were evil sorcerers, while in Indonesia and Malaysia they were somewhat more benign. In the Hindu epic Mahabharata, the tiger is fiercer and more ruthless than the lion.
Literature, art and film
In William Blake's poem in the Songs of Experience, titled "The Tyger", the tiger is a menacing and fearful animal. In Yann Martel's 2001 Man Booker Prize winning novel Life of Pi, the protagonist, surviving shipwreck for months in a small boat, somehow avoids being eaten by the other survivor, a large Bengal tiger. The story was adapted in Ang Lee's 2012 feature film of the same name. Jim Corbett's 1944 Man-Eaters of Kumaon tells ten true stories of his tiger-hunting exploits in what is now the northern Uttarakhand region of India. The book has sold over four million copies, and has been the basis of both fictional and documentary films. In Rudyard Kipling's 1894 The Jungle Book, the tiger, Shere Khan, is the mortal enemy of the human protagonist, Mowgli. More benign tiger characters include Tigger in A. A. Milne's Winnie-the-Pooh and Hobbes of the comic strip Calvin and Hobbes, both of whom are represented as simply stuffed animals come to life.
Tigers are also mascots for various sports teams around the world. Tony the Tiger is a famous mascot for Kellogg's breakfast cereal Frosted Flakes. The Esso (Exxon) brand of petrol was advertised from 1969 onwards with the slogan 'put a tiger in your tank', and a tiger mascot; more than 2.5 million synthetic tiger tails were sold to motorists, who tied them to their petrol tank caps.
Politics and economics
The tiger is one of the animals displayed on the Pashupati seal of the Indus Valley Civilisation. The tiger was the emblem of the Chola Dynasty and was depicted on coins, seals and banners. The seals of several Chola copper coins show the tiger, the Pandyan emblem fish and the Chera emblem bow, indicating that the Cholas had achieved political supremacy over the latter two dynasties. Gold coins found in Kavilayadavalli in the Nellore district of Andhra Pradesh have motifs of the tiger, bow and some indistinct marks. The tiger symbol of Chola Empire was later adopted by the Liberation Tigers of Tamil Eelam and the tiger became a symbol of the unrecognised state of Tamil Eelam and Tamil independence movement.
The Bengal tiger is the national animal of India and Bangladesh. The Malaysian tiger is the national animal of Malaysia. The Siberian tiger is the national animal of South Korea. Since the successful economies of South Korea, Taiwan, Hong Kong and Singapore were described as the Four Asian Tigers, a tiger economy is a metaphor for a nation in rapid development.
- Goodrich, J.; Lynam, A.; Miquelle, D.; Wibisono, H.; Kawanishi, K.; Pattanavibool, A.; Htun, S.; Tempa, T.; Karki, J.; Jhala, Y.; Karanth, U. (2015). "Panthera tigris". The IUCN Red List of Threatened Species. IUCN. 2015: e.T15955A50659951. doi:10.2305/IUCN.UK.2015-2.RLTS.T15955A50659951.en. Retrieved 23 October 2018.
- Linnaeus, C. (1758). "Felis tigris". Caroli Linnæi Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Tomus I (decima, reformata ed.). Holmiae: Laurentius Salvius. p. 41.
- Dinerstein, E.; Loucks, C.; Wikramanayake, E.; Ginsberg, Jo.; Sanderson, E.; Seidensticker, J.; Forrest, J.; Bryja, G.; Heydlauff, A. (2007). "The Fate of Wild Tigers" (PDF). BioScience. 57 (6): 508–514. doi:10.1641/B570608. Archived from the original (PDF) on 25 April 2012.
- "tiger". The Free Dictionary. Farlex. Retrieved 6 April 2014.
- Liddell, H. G. & Scott, R. (1940). "τίγρις". A Greek-English Lexicon, revised and augmented. Oxford: Clarendon Press.
- Harper, D. (2001–2011). "Tiger". Online Etymology Dictionary. Etymonline.com. Retrieved 6 April 2014.
- Oxford English Dictionary, entry tiger
- Harper, D. (2001–2011). "Panther". Online Etymology Dictionary. Douglas Harper. Retrieved 24 October 2011.
- Oxford Dictionary of English Etymology, edited by C.T. Onions, entry panther
- Pocock, R. I. (1929). "Tigers". Journal of the Bombay Natural History Society. 33: 505–541.
- Pocock, R. I. (1939). "Panthera tigris". The Fauna of British India, Including Ceylon and Burma. Mammalia: Volume 1. London: T. Taylor and Francis, Ltd. pp. 197–210.
- Johnson; Eizirik, E., W. E.; Pecon-Slattery, J.; Murphy, W. J.; Antunes, A.; Teeling, E.; O'Brien, S. J. (2006). "The Late Miocene radiation of modern Felidae: A genetic assessment". Science. 311 (5757): 73–77. Bibcode:2006Sci...311...73J. doi:10.1126/science.1122277. PMID 16400146.
- Davis, B. W.; Li, G.; Murphy, W. J. (2010). "Supermatrix and species tree methods resolve phylogenetic relationships within the big cats, Panthera (Carnivora: Felidae)". Molecular Phylogenetics and Evolution. 56 (1): 64–76. doi:10.1016/j.ympev.2010.01.036. PMID 20138224.
- Groves, C. P. (1992). "How old are subspecies?: A tiger's eye‐view of human evolution". Archaeology in Oceania. 27 (3): 153–160. doi:10.1002/j.1834-4453.1992.tb00299.x.
- Mazák, J. H.; Christiansen, P.; Kitchener, A. C. (2011). "Oldest Known Pantherine Skull and Evolution of the Tiger". PLoS ONE. 6 (10): e25483. Bibcode:2011PLoSO...625483M. doi:10.1371/journal.pone.0025483. PMC 3189913. PMID 22016768.
- Hemmer, H. (1971). "Fossil mammals of Java. II. Zur Fossilgeschichte des Tigers (Panthera tigris (L.)) in Java". Koninklijke Nederlandse Akademie van Wetenschappen. B. 74 (1): 35–52.
- Hasegawa, Y.; Tomida, Y.; Kohno, N.; Ono, K.; Nokariya, H.; Uyeno, T. (1988). "Quaternary vertebrates from Shiriya area, Shimokita Pininsula, northeastern Japan". Memoirs of the National Science Museum. 21: 17–36.
- Turner, A.; Antón, M. (1997). The Big Cats and Their Fossil Relatives: An Illustrated Guide to Their Evolution and Natural History. Columbia University Press. ISBN 978-0-231-10228-5.
- Piper, P. J.; Ochoa, J.; Lewis, H.; Paz, V.; Ronquillo, W. P. (2008). "The first evidence for the past presence of the tiger Panthera tigris (L.) on the island of Palawan, Philippines: extinction in an island population". Palaeogeography, Palaeoclimatology, Palaeoecology. 264 (1–2): 123–127. doi:10.1016/j.palaeo.2008.04.003.
- Kitchener, A.; Yamaguchi, N. (2010). "What is a Tiger? Biogeography, Morphology, and Taxonomy". In Tilson, R.; Nyhus, P. J. Tigers of the World: The Science, Politics and Conservation of Panthera tigris (Second ed.). London, Burlington: Academic Press. pp. 53–84. ISBN 978-0-08-094751-8.
- Piper, P. J.; Rabett, R. J. (2007). "Confirmation of the presence of the tiger Panthera tigris (L.) in Late Pleistocene and Holocene Borneo". Malayan Nature Journal. 59 (3): 259–267. Retrieved 2018-05-29.
- Cooper, D. M.; Dugmore, A. J.; Gittings, B. M.; Scharf, A. K.; Wilting, A.; Kitchener, A. C. (2016). "Predicted Pleistocene–Holocene rangeshifts of the tiger (Panthera tigris)". Diversity and Distributions. 22 (11): 1–13. doi:10.1111/ddi.12484.
- Luo, S.-J.; Kim, J.-H.; Johnson, W. E.; van der Walt, J.; Martenson, J.; Yuhki, N.; Miquelle, D. G.; Uphyrkina, O.; Goodrich, J. M.; Quigley, H. B.; Tilson, R.; Brady, G.; Martelli, P.; Subramaniam, V.; McDougal, C.; Hean, S.; Huang, S.-Q.; Pan, W.; Karanth, U. K.; Sunquist, M.; Smith, J. L. D.; O'Brien, S. J. (2004). "Phylogeography and genetic ancestry of tigers (Panthera tigris)". PLoS Biology. 2 (12): e442. doi:10.1371/journal.pbio.0020442. PMC 534810. PMID 15583716.
- Cho, Y. S.; Hu, L.; Hou, H.; Lee, H.; Xu, J.; Kwon, S.; Oh, S.; Kim, H. M.; Jho, S.; Kim, S.; Shin, Y. A.; Kim, B. C.; Kim, H.; Kim, C. U.; Luo, S. J.; Johnson, W. E.; Koepfli, K. P.; Schmidt-Küntzel, A.; Turner, J. A.; Marker, L.; Harper, C.; Miller, S. M.; Jacobs, W.; Bertola, L. D.; Kim, T. H.; Lee, S.; Zhou, Q.; Jung, H. J.; Xu, X.; Gadhvi, P.; et al. (2013). "The tiger genome and comparative analysis with lion and snow leopard genomes". Nature Communications. 4: 2433. Bibcode:2013NatCo...4E2433C. doi:10.1038/ncomms3433. PMC 3778509. PMID 24045858.
- Wozencraft, W.C. (2005). "Species Panthera tigris". In Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 546. ISBN 978-0-8018-8221-0. OCLC 62265494.
- Kitchener, A. (1999). "Tiger distribution, phenotypic variation and conservation issues". In Seidensticker, J.; Christie, S.; Jackson, P. Riding the Tiger: Tiger Conservation in Human-Dominated Landscapes. Cambridge: Cambridge University Press. pp. 19–39. ISBN 978-0521648356.
- Mazák, J. H.; Groves, C. P. (2006). "A taxonomic revision of the tigers (Panthera tigris) of Southeast Asia". Mammalian Biology, Zeitschrift für Säugetierkunde. 71 (5): 268–287. doi:10.1016/j.mambio.2006.02.007.
- Wilting, A.; Courtiol, A.; Christiansen, P.; Niedballa, J.; Scharf, A. K.; Orlando, L.; Balkenhol, N.; Hofer, H.; Kramer-Schadt, S.; Fickel, J.; Kitchener, A. C. (2015). "Planning tiger recovery: Understanding intraspecific variation for effective conservation". Science Advances. 11 (5: e1400175): e1400175. Bibcode:2015SciA....1E0175W. doi:10.1126/sciadv.1400175. PMC 4640610. PMID 26601191.
- Kupferschmidt, K. (2015). "Controversial study claims there are only two types of tiger". Science. doi:10.1126/science.aac6905. Retrieved 27 June 2015.
- Kitchener, A. C.; Breitenmoser-Würsten, C.; Eizirik, E.; Gentry, A.; Werdelin, L.; Wilting, A.; Yamaguchi, N.; Abramov, A. V.; Christiansen, P.; Driscoll, C.; Duckworth, J. W.; Johnson, W.; Luo, S.-J.; Meijaard, E.; O’Donoghue, P.; Sanderson, J.; Seymour, K.; Bruford, M.; Groves, C.; Hoffmann, M.; Nowell, K.; Timmons, Z.; Tobe, S. (2017). "A revised taxonomy of the Felidae: The final report of the Cat Classification Task Force of the IUCN Cat Specialist Group" (PDF). Cat News (Special Issue 11): 66−68.
- Burke, Jason (20 January 2015). "India's tiger population increases by almost a third". The Guardian. Retrieved 3 May 2015.
- "Bhutan's tigers". World Wide Fund For Nature (WWF). Archived from the original on 2016-03-04. Retrieved 29 November 2015.
- Heptner, V. G.; Sludskij, A. A. (1992) . "Tiger". Mlekopitajuščie Sovetskogo Soiuza. Moskva: Vysšaia Škola [Mammals of the Soviet Union. Volume II, Part 2. Carnivora (Hyaenas and Cats)]. Washington DC: Smithsonian Institution and the National Science Foundation. pp. 95–202.
- Driscoll, C. A.; Yamaguchi, N.; Bar-Gal, G. K.; Roca, A. L.; Luo, S.; MacDonald, D. W.; O'Brien, S. J. (2009). "Mitochondrial Phylogeography Illuminates the Origin of the Extinct Caspian Tiger and Its Relationship to the Amur Tiger". PLoS ONE. 4 (1): e4125. Bibcode:2009PLoSO...4.4125D. doi:10.1371/journal.pone.0004125. PMC 2624500. PMID 19142238.
- Jackson, P.; Nowell, K. (2011). "Panthera tigris ssp. virgata". The IUCN Red List of Threatened Species. IUCN. 2011: e.T41505A10480967. doi:10.2305/IUCN.UK.2011-2.RLTS.T41505A10480967.en.
- Kerley, L. L.; Goodrich, J. M.; Miquelle, D. G.; Smirnov, E. N.; Quigley, H. G.; Hornocker, M. G. (2003). "Reproductive parameters of wild female Amur (Siberian) tigers (Panthera tigris altaica)". Journal of Mammalogy. 84 (1): 288–298. doi:10.1644/1545-1542(2003)084<0288:RPOWFA>2.0.CO;2. JSTOR 1383657.
- Xiao, W.; Feng, L.; Mou, P.; Miquelle, D. G.; Hebblewhite, M.; Goldberg, J. F.; Robinson, H. S.; Zhao, X.; Zhou, B.; Wang, T.; Ge, J. (2016). "Estimating abundance and density of Amur tigers along the Sino–Russian border". Integrative Zoology. 11 (4): 322−332. doi:10.1111/1749-4877.12210. PMID 27136188.
- "Russia Announce Tiger Census Results!". tigers.panda.org. World Wide Fund for Nature. 27 May 2015. Retrieved 7 June 2015.
- Mazák, V. (1981). "Panthera tigris" (PDF). Mammalian Species. 152 (152): 1–8. doi:10.2307/3504004. JSTOR 3504004. Archived from the original (PDF) on 9 March 2012.
- Nyhus, P. (2008). "Panthera tigris ssp. amoyensis". The IUCN Red List of Threatened Species. IUCN: e.T15965A5334628. doi:10.2305/IUCN.UK.2008.RLTS.T15965A5334628.en.
- Xu, Y. C.; Fang, S. G.; Li, Z. K. (2007). "Sustainability of the South China tiger: implications of inbreeding depression and introgression". Conservation Genetics. 8 (5): 1199–1207. CiteSeerX 10.1.1.662.4860. doi:10.1007/s10592-006-9276-9.
- Mazák, V. (1968). "Nouvelle sous-espèce de tigre provenant de l'Asie du sud-est". Mammalia. 32 (1): 104−112. doi:10.1515/mamm.1918.104.22.168.
- Mazák, J. H.; Groves, C. P. (2006). "A taxonomic revision of the tigers (Panthera tigris)" (PDF). Mammalian Biology. 71 (5): 268–287. doi:10.1016/j.mambio.2006.02.007. Archived from the original (PDF) on 6 September 2007.
- Kawanishi, K. (2015). "Panthera tigris subsp. jacksoni". The IUCN Red List of Threatened Species. IUCN: e.T136893A50665029. doi:10.2305/IUCN.UK.2015-2.RLTS.T136893A50665029.en.
- Khan, M.K.M. (1986). "Tigers in Malaysia" (PDF). Journal of Wildlife and Parks. V: 1–23.
- Seidensticker, J. (1987). "Bearing Witness: Observations on the Extinction of Panthera tigris balica and Panthera tigris sondaica". In Tilson, R. L.; Seal, U. S. Tigers of the World: the biology, biopolitics, management, and conservation of an endangered species. New Jersey: Noyes Publications. pp. 1–8. ISBN 978-0-8155-1133-5.
- Istiadi, Y.; Panekenan, N.; Priatna, D.; Novendri, Y.; Mathys, A.; Mathys, Y. (1991). "Untersuchung über die Carnivoren des Gunung Halimun Naturschutzgebietes". Zoologische Gesellschaft für Arten- und Populationsschutz E.V. Mitteilungen. 7 (2): 3–5.
- Mazak, V. (2004). Der Tiger. Westarp Wissenschaften Hohenwarsleben. ISBN 978-3-89432-759-0. (in German)
- Mazak, V.; Groves, C. P.; Van Bree, P. (1978). "Skin and Skull of the Bali Tiger, and a list of preserved specimens of Panthera tigris balica (Schwarz, 1912)". Zeitschrift für Säugetierkunde – International Journal of Mammalian Biology. 43 (2): 108–113.
- Whitten, T.; Soeriaatmadja, R. E. (1996). "Examples of Biological Diversity Loss from Java and Bali:Tigers". Ecology of Java & Bali. Oxford University Press. pp. 706−708. ISBN 978-962-593-072-5.
- Cracraft, J.; Feinstein, J.; Vaughn, J.; Helm-Bychowski, K. (1998). "Sorting out tigers (Panthera tigris): mitochondrial sequences, nuclear inserts, systematics, and conservation genetics" (PDF). Animal Conservation. 1 (2): 139–150. doi:10.1111/j.1469-1795.1998.tb00021.x.
- Linkie, M.; Wibisono, H. T.; Martyr, D. J. & Sunarto, S. (2008). "Panthera tigris ssp. sumatrae". The IUCN Red List of Threatened Species. IUCN: e.T15966A5334836. doi:10.2305/IUCN.UK.2008.RLTS.T15966A5334836.en.
- Actman, Jani (24 February 2017). "Cat Experts: Ligers and Other Designer Hybrids Pointless and Unethical". National Geogrpahic.com. Retrieved 27 August 2018.
- Markel, S.; León, D. (2003). Sequence Analysis in a Nutshell: a guide to common tools and databases (PDF). Sebastopol, California: O'Reily. ISBN 978-0-596-00494-1.
- "Genomic Imprinting". Genetic Science Learning Center, Utah.org. Retrieved 26 August 2018.
- Singh, A. (1985). "Okapis and litigons in London and Calcutta". New Scientist (1453): 7.
- Guggisberg, C. A. W. (1975). "Tiger Panthera tigris (Linnaeus, 1758)". Wild Cats of the World. New York: Taplinger Pub. Co. pp. 180–215. ISBN 978-0-7950-0128-4.
- Miquelle, D. (2001). "Tiger". In MacDonald, D. The Encyclopedia of Mammals (2nd ed.). Oxford University Press. pp. 18–21. ISBN 978-0-7607-1969-5.
- Godfrey, D.; Lythgoe, J. N.; Rumball, D. A. (1987). "Zebra stripes and tiger stripes: the spatial frequency distribution of the pattern compared to that of the background is significant in display and crypsis". Biological Journal of the Linnean Society. 32 (4): 427–433. doi:10.1111/j.1095-8312.1987.tb00442.x.
- Allen, William L.; Cuthill, Innes C.; Scott-Samuel, Nicholas E.; Baddeley, Roland (2010). "Why the leopard got its spots: relating pattern development to ecology in felids". Proceedings of the Royal Society B. 278 (1710): 1373–1380. doi:10.1098/rspb.2010.1734. PMC 3061134. PMID 20961899.
- Langley, L. (2017). "Do Zebras Have Stripes On Their Skin?". National Geographic.
However big cats, such as tigers, have skin patterns that mirror their fur, ... That's likely because the colored hair follicles embedded in the skin are visible, similar to a man's five-o'clock shadow, ... "follicles seem to give the skin a slightly different contrast."
- Schaller, G. (1967). The Deer and the Tiger: A Study of Wildlife in India. Chicago: Chicago Press.
- Matthiessen, P.; Hornocker, M. (2008). Tigers In The Snow (reprint ed.). Paw Prints. ISBN 9781435296152.
- McNab, B. K. (1971). "On the ecological significance of Bergman'rule". Ecology. 52 (5): 845–854. doi:10.2307/1936032. JSTOR 1936032.
- Karanth, K. U. (2003). "Tiger ecology and conservation in the Indian subcontinent". Journal of the Bombay Natural History Society. 100 (2&3): 169–189.
- Smith, J. L. D.; Sunquist, M. E.; Tamang, K. M.; Rai, P. B. (1983). "A technique for capturing and immobilizing tigers". The Journal of Wildlife Management. 47 (1): 255–259. doi:10.2307/3808080. JSTOR 3808080.
- Slaght, J. C.; Miquelle, D. G.; Nikolaev, I. G.; Goodrich, J. M.; Smirnov, E.; Traylor-Holzer, N. K.; Christie, S.; Arjanova, T.; Smith, J. L. D.; Karanth, K. U. (2005). "Chapter 6. Who's king of the beasts? Historical and recent body weights of wild and captive Amur tigers, with comparisons to other subspecies" (PDF). In Miquelle, D. G.; Smirnov, E. N.; Goodrich, J. M. Tigers in Sikhote-Alin Zapovednik: Ecology and Conservation. Vladivostok, Russia: PSP. pp. 25–35.
- Wood, G. (1983). The Guinness Book of Animal Facts and Feats. Guinness Superlatives. ISBN 978-0-85112-235-9.
- Conover, A. (1995). "The object at hand". Smithsonian Magazine. Archived from the original on 2013-02-02. Retrieved 2014-04-07.
- Brakefield, T. (1993). Big Cats: Kingdom of Might. Voyageur Press. p. 44. ISBN 978-0-89658-329-0.
- Hewett, J. P.; Hewett Atkinson, L. (1938). "Statistics of Lengths and Weights of Tigers". Jungle trails in northern India: reminiscences of hunting in India. London: Metheun and Company Limited. pp. 66−74.
- Robinson, R. (1969). "The white tigers of Rewa and gene homology in the Felidae". Genetica. 40 (1): 198−200. doi:10.1007/BF01787350.
- Xu, X.; Dong, G. X.; Hu, X. S.; Miao, L.; Zhang, X. L.; Zhang, D. L.; Yang, H. D.; Zhang, T. Y.; Zou, Z. T.; Zhang, T. T.; Zhuang, Y.; Bhak, J.; Cho, Y. S.; Dai, W. T.; Jiang, T. J.; Xie, C.; Li, R.; Luo, S. J. (2013). "The Genetic Basis of White Tigers". Current Biology. 23 (11): 1031–5. doi:10.1016/j.cub.2013.04.054. PMID 23707431.
- Gee, E. P. (1959). "Albinism and Partial Albinism in Tigers". The Journal of the Bombay Natural History Society. 56: 581−587.
- Guillery, R. W.; Kaas, J. H. (1973). "Genetic abnormality of the visual pathways in a "white" tiger". Science. 180 (4092): 1287−1289. Bibcode:1973Sci...180.1287G. doi:10.1126/science.180.4092.1287.
- Begany, L.; Criscuolo, C. L. (2009). "Accumulation of Deleterious Mutations Due to Inbreeding in Tiger Population" (PDF). Archived from the original (PDF) on 2015-05-10.
- Xu, Xiao; Dong, Gui-Xin; Schmidt-Küntzel, Anne; Zhang, Xue-Li; Zhuang, Yan; Fang, Run; Sun, Xin; Hu, Xue-Song; Zhang, Tian-You; Yang, Han-Dong; Zhang, De-Lu; Marker, Laurie; Jiang, Zheng-Fan; Li, Ruiqiang; Luo, Shu-Jin (2017). "The genetics of tiger pelage color variations" (PDF). Cell Research. 27 (7): 954–957. doi:10.1038/cr.2017.32. PMC 5518981. PMID 28281538.
- Sunquist, M. (2010). "What is a Tiger? Ecology and Behaviour". In R. Tilson; P. J. Nyhus. Tigers of the World: The Science, Politics and Conservation of Panthera tigris (Second ed.). London, Burlington: Academic Press. p. 19−34. ISBN 978-0-08-094751-8.
- Seidensticker, J. (1986). "Large Carnivores and the Consequences of Habitat Insularization: ecology and conservation of Tigers in Indonesia and Bangladesh" (PDF). In Miller, S. D.; Everett, D. D. Cats of the world: biology, conservation and management. Washington DC: National Wildlife Federation. pp. 1−41.
- Miquelle, D. G.; Smirnov, E. N.; Merrill, T. W.; Myslenkov, A. E.; Quigley, H.; Hornocker, M. G.; Schleyer, B. (1999). "Hierarchical spatial analysis of Amur tiger relationships to habitat and prey". In Seidensticker, J.; Christie, S.; Jackson, P. Riding the Tiger. Tiger Conservation in Human-dominated Landscapes. London: Cambridge University Press. pp. 71–99. ISBN 978-0521648356.
- Karanth, K. U.; Sunquist, M. E.; Chinnappa, K. M. (1999). "Long-term monitoring of tigers: lessons from Nagarahole". In Seidensticker, J.; Christie, S.; Jackson, P. Riding the Tiger. Tiger Conservation in Human-dominated Landscapes. London: Cambridge University Press. pp. 114–122. ISBN 978-0521648356.
- Can, Ö. E. (2004). Status, conservation and management of large carnivores in Turkey (PDF). Strasbourg: Convention on the conservation of European wildlife and natural habitats.
- Kock, D. (1999). "Historical record of a tiger, Panthera tigris (Linnaeus, 1758), in Iraq". Zoology in the Middle East. 4: 11–15. doi:10.1080/09397140.1990.10637583.
- Faizolahi, K. (2016). "Tiger in Iran – historical distribution, extinction causes and feasibility of reintroduction". Cat News (Special Issue 10): 5–13.
- Tilson, R.; Defu, H.; Muntifering, J.; Nyhus, P. J. (2004). "Dramatic decline of wild South China tigers Panthera tigris amoyensis: field survey of priority tiger reserves". Oryx. 38 (1): 40–47. doi:10.1017/S0030605304000079.
- Wang, T.M.; Yang, H.T.; Xiao, W.H.; Feng, L.M.; Mou, P.; Ge, J. P. (2014). "Camera traps reveal Amur tiger breeding in NE China". Cat News (61): 18−19.
- Wang, T.; Feng, L.; Mou, P.; Wu, J.; Smith, J.L.; Xiao, W.; Yang, H.; Dou, H.; Zhao, X.; Cheng, Y.; Zhou, B. (2016). "Amur tigers and leopards returning to China: direct evidence and a landscape conservation plan". Landscape Ecology. 31 (3): 491−503. doi:10.1007/s10980-015-0278-1.
- Xiao, W.; Feng, L.; Mou, P.; Miquelle, D.G.; Hebblewhite, M.; Goldberg, J.F.; Robinson, H.S.; Zhao, X.; Zhou, B.; Wang, T.; Ge, J. (2016). "Estimating abundance and density of Amur tigers along the Sino–Russian border". Integrative Zoology. 11 (4): 322−332. doi:10.1111/1749-4877.12210. PMID 27136188.
- Rabinowitz, A. (1999). "The status of the Indochinese tiger: separating facts from fiction". In Seidensticker, J.; Christie, S.; Jackson, P. Riding the Tiger: Tiger Conservation in Human-Dominated Landscapes. London: Cambridge University Press. pp. 148−165. ISBN 978-0521648356.
- Jackson, P. (1996). "The status of the tiger in 1996". Cat News (25): 6.
- Berkmüller, K.; Evans, T.; Timmins, R.; Vongphet, V. (1995). "Recent advances in nature conservation in the Lao PDR". Oryx. 29 (4): 253−260. doi:10.1017/S0030605300021244.
- Duckworth, J. W.; Salter, R. E.; Khounboline, K. (1999). Wildlife in Lao PDR. 1999 Status Report. Vientiane: IUCN, Wildlife Conservation Society, Centre for Protected Areas and Watershed Management. ISBN 978-2-8317-0483-8.
- Johnson, A.; Vongkhamheng C.; Hedemark, M.; Saithongdam T. (2006). "Effects of human–carnivore conflict on tiger (Panthera tigris) and prey populations in Lao PDR" (PDF). Animal Conservation. 9 (4): 421−430. doi:10.1111/j.1469-1795.2006.00049.x.
- Nowell, K.; Sun, H.; Weiler, H.; Smith, D. J. L. (1999). "National status survey for tigers in Cambodia". Cat News (30): 4−8.
- Gray, T. N. E.; Ou R.; Huy K.; Pin C.; Maxwell, A. L. (2012). "The status of large mammals in eastern Cambodia: a review of camera trapping data 1999–2007" (PDF). Cambodian Journal of Natural History. 2012 (1): 42−55.
- Lynam, A.J. (2010). "Securing a future for wild Indochinese tigers: Transforming tiger vacuums into tiger source sites" (PDF). Integrative Zoology. 5 (4): 324−334. doi:10.1111/j.1749-4877.2010.00220.x. PMID 21392350.
- Wibisono, H. T.; Linkie, M.; Guillera-Arroita, G.; Smith, J. A.; Sunarto; Pusarini, W.; Asriadi; Baroto, P.; Brickle, N.; Dinata, Y.; Gemita, E.; Gunaryadi, D.; Haidir, I. A.; Herwansyah (2011). "Population Status of a Cryptic Top Predator: An Island-Wide Assessment of Tigers in Sumatran Rainforests". PLoS One. 6 (11): e25931. Bibcode:2011PLoSO...625931W. doi:10.1371/journal.pone.0025931. PMC 3206793. PMID 22087218.
- Sanderson, E.; Forrest, F.; Loucks, C.; Ginsberg, J.; Dinerstein, E.; Seidensticker, J.; Leimgruber, P.; Songer, M.; Heydlauff, A.; O’Brien, T.; Bryja, G.; Klenzendorf, S.; Wikramanayake, E. (2010). "Setting priorities for the conservation and recovery of wild tigers: 2005–2015" (PDF). In Tilson, R.; Nyhus, P. J. Tigers of the World: The Science, Politics and Conservation of Panthera tigris (Second ed.). New York, Washington, D.C.: Academic Press. pp. 143−161. ISBN 978-0-08-094751-8.
- Dorji, D. P.; Santiapillai, C. (1989). "The Status, Distribution and Conservation of the Tiger Panthera tigris in Bhutan" (PDF). Biological Conservation. 48 (4): 311–319. doi:10.1016/0006-3207(89)90105-5.
- Thapar, V. (1994). The Tiger's Destiny. London: Kyle Cathie. pp. 47, 174–175. ISBN 978-1-85626-142-5.
- Sunquist, M.; Sunquist, F. (1991). "Tigers". In Seidensticker, J.; Lumpkin, S. Great Cats. Fog City Press. pp. 97–98. ISBN 978-1-875137-90-9.
- Novak, R. M.; Walker, E. P. (1999). "Panthera tigris (tiger)". Walker's Mammals of the World (6th ed.). Baltimore: Johns Hopkins University Press. pp. 825–828. ISBN 978-0-8018-5789-8.
- Joshi, A.; Vaidyanathan, S.; Mondol, S.; Edgaonkar, A.; Ramakrishnan, U. (2013). "Connectivity of Tiger (Panthera tigris) Populations in the Human-Influenced Forest Mosaic of Central India". PLoS ONE. 8 (11): e77980. Bibcode:2013PLoSO...877980J. doi:10.1371/journal.pone.0077980. PMC 3819329. PMID 24223132.
- Smith, J. L. D. (1993). "The role of dispersal in structuring the Chitwan tiger population". Behaviour. 124 (3): 165–195. doi:10.1163/156853993X00560.
- McDougal, Charles (1977). The Face of the Tiger. London: Rivington Books and André Deutsch. pp. 63–76.
- Mills, S. (2004). Tiger. London: BBC Books. p. 89. ISBN 978-1-55297-949-5.
- Burger, B. V.; Viviers, M. Z.; Bekker, J. P. I.; Roux, M.; Fish, N.; Fourie, W. B.; Weibchen, G. (2008). "Chemical Characterization of Territorial Marking Fluid of Male Bengal Tiger, Panthera tigris" (PDF). Journal of Chemical Ecology. 34 (5): 659–671. doi:10.1007/s10886-008-9462-y. PMID 18437496.
- Smith, J. L. David; McDougal, C.; Miquelle, D. (1989). "Scent marking in free-ranging tigers, Panthera tigris" (PDF). Animal Behaviour. 37: 1–10. doi:10.1016/0003-3472(89)90001-8.[permanent dead link]
- Wildlife Conservation Society. (2015). Tiger dad: Rare family portrait of Amur tigers the first-ever to include an adult male. ScienceDaily, 6 March 2015.
- "T-25 Dollar Dominant Male Tiger in Ranthambore National Park".
- Thapar, V. (1989). Tiger: Portrait of a Predator. New York: Smithmark. ISBN 978-0-8160-1238-1.
- Peters, G.; Tonkin-Leyhausen, B. A. (1999). "Evolution of Acoustic Communication Signals of Mammals: Friendly Close-Range Vocalizations in Felidae (Carnivora)". Journal of Mammalian Evolution. 6 (2): 129–159. doi:10.1023/A:1020620121416.
- Ramesh, T.; Snehalatha, V.; Sankar, K. & Qureshi, Q. (2009). "Food habits and prey selection of tiger and leopard in Mudumalai Tiger Reserve, Tamil Nadu, India". Journal of Scientific Transactions in Environment and Technovation. 2 (3): 170–181. doi:10.20894/stet.116.002.003.010.
- Karanth, K. U. & Sunquist, M. E. (1995). "Prey Selection by Tiger, Leopard and Dhole in Tropical Forests". Journal of Animal Ecology. 64 (4): 439–450. doi:10.2307/5647. JSTOR 5647.
- Andheria, A.P.; Karanth, K.U.; Kumar, N.S. (2007). "Diet and prey profiles of three sympatric large carnivores in Bandipur Tiger Reserve, India". Journal of Zoology. 273 (2): 169–175. doi:10.1111/j.1469-7998.2007.00310.x.
- Perry, Richard (1965). The World of the Tiger. p. 260.
- Miquelle, Dale G.; Smirnov, Evgeny N.; Quigley, Howard B.; Hornocker, Maurice G.; Nikolayev, Igor G. & Matyushkin, Evgeny N. (1996). "Food habits of Amur tigers in the Sikhote-Alin Zapovednik and the Russian Far East, and implications for conservation" (PDF). Journal of Wildlife Research. 1 (2): 138. Archived from the original (PDF) on 1 November 2012.
- David Prynn (2004). Amur tiger. Russian Nature Press. p. 115.
- Seryodkin; et al. (2003). "Denning ecology of brown bears and Asiatic black bears in the Russian Far East". Ursus. 14 (2): 159.
- Seryodkin I. V.; Goodrich J. M.; Kostyrya A. V.; Schleyer B. O.; Smirnov E. N.; Kerley L. L.; Miquelle D. G. (2005). "19". Relationship among tigers, brown bears, and Himalayan black bears. Tigers of Sikhote-Alin Zapovednik: Ecology and Conservation.
- Linkie, M.; Ridout, M. S. (2011). "Assessing tiger-prey interactions in Sumatran rainforests". Journal of Zoology. 284 (3): 224–229. doi:10.1111/j.1469-7998.2011.00801.x.
- Cawthon Lang KA (13 June 2005). "Primate Factsheets: Orangutan (Pongo) Taxonomy, Morphology, & Ecology". Retrieved 12 October 2007.
- "Trouble for rhino from poacher and Bengal tiger". The Telegraph. 2008. Archived from the original on 27 September 2014. Retrieved 3 June 2014.
- "Tiger kills elephant at Eravikulam park". The New Indian Express. 2009.
- Karanth, K. U. & Nichols, J. D. (1998). "Estimation of tiger densities in India using photographic captures and recaptures" (PDF). Ecology. 79 (8): 2852–2862. doi:10.1890/0012-9658(1998)079[2852:EOTDII]2.0.CO;2. JSTOR 176521.
- "Tiger kills adult rhino in Dudhwa Tiger Reserve". The Hindu. 29 January 2013 – via www.thehindu.com.
- Frank Leslie's popular monthly, Volume 45, 1879, edited by Frank Leslie, New York: Frank Leslie's Publishing House. 53, 55, & 57 Park Place. p. 411
- Bright, M. (2002). Man-Eaters. Macmillan. pp. 53–54. ISBN 978-0-312-98156-3.
- BBC (2008). Tiger: Spy In The Jungle. John Downer Productions
- Sankhala, p. 17
- Hunter, Luke (2011). Carnivores of the World. Princeton University Press. ISBN 978-0-691-15228-8.
- Sunquist, M.; Sunquist, F. (2002). "Tiger Panthera tigris (Linnaeus, 1758)". Wild Cats of the World. Chicago: University Of Chicago Press. pp. 343–372. ISBN 978-0-22-677999-7.
- Sankhala, p. 23
- Mills, Stephen (2004). Tiger. Richmond Hill, Ontario.: Firefly Books. p. 168. ISBN 978-1-55297-949-5.
- "Tiger". Oaklandzoo.org. Archived from the original on 25 October 2010. Retrieved 7 March 2009.
- Sunquist, Fiona & Sunquist, Mel (2002). Tiger Moon. University of Chicago Press. ISBN 978-0-226-77997-3.
- Mills, Gus; Hofer, Heribert (1998). Hyaenas: status survey and conservation action plan. IUCN/SSC Hyena Specialist Group. ISBN 2-8317-0442-1.
- Miquelle, D.G., Stephens, P.A., Smirnov, E.N., Goodrich, J.M., Zaumyslova, O.Yu. & Myslenkov, A.I. (2005). Tigers and Wolves in the Russian Far East: Competitive Exclusion, Functional Redundancy and Conservation Implications. In Large Carnivores and the Conservation of Biodiversity. Ray, J.C., Berger, J., Redford, K.H. & Steneck, R. (eds.) New York: Island Press. pp. 179–207 ISBN 1-55963-080-9.
- Goldsmith, O. (2010). A History Of The Earth, And Animated Nature, Volume 2. Nabu Press. p. 297. ISBN 978-1-145-11108-0.
- Mills, Stephen (2004). Tiger. Richmond Hill, Ont.: Firefly Books. p. 168. ISBN 978-1-55297-949-5.
- "Sympatric Tiger and Leopard: How two big cats coexist in the same area". Archived from the original on 13 February 2008. Ecology.info
- Karanth, K. Ullas; Sunquist, Melvin E. (2000). "Behavioural correlates of predation by tiger (Panthera tigris), leopard (Panthera pardus) and dhole (Cuon alpinus) in Nagarahole, India". Journal of Zoology. 250 (2): 255–265. doi:10.1111/j.1469-7998.2000.tb01076.x.
- Sillero-Zubiri, C., Hoffmann, M. and Macdonald, D.W. (eds). 2004. Canids: Foxes, Wolves, Jackals and Dogs. Status Survey and Conservation Action Plan. IUCN/SSC Canid Specialist Group. Gland, Switzerland and Cambridge, UK. ISBN 2-8317-0786-2
- Thinley, P.; et al. (2018). "The ecological benefit of tigers (Panthera tigris) to farmers in reducing crop and livestock losses in the eastern Himalayas: Implications for conservation of large apex predators". Biological Conservation. 219: 119–125. doi:10.1016/j.biocon.2018.08.007.
- Sankhala, K. S. (1967). "Breeding behaviour of the tiger Panthera tigris in Rajasthan". International Zoo Yearbook. 7 (1): 133−147. doi:10.1111/j.1748-1090.1967.tb00354.x.
- Pacifici, M.; Santini, L.; Di Marco, M.; Baisero, D.; Francucci, L.; Grottolo Marasini, G.; Visconti, P.; Rondinini, C. (2013). "Generation length for mammals". Nature Conservation (5): 87–94.
- Global Tiger Forum (2016). "Global wild tiger population status, April 2016" (PDF). Global Tiger Forum, WWF.
- Wikramanayake, E. D.; Dinerstein, E.; Robinson, J. G.; Karanth, K. U.; Rabinowitz, A.; Olson, D.; Mathew, T.; Hedao, P.; Connor, M.; Hemley, G.; Bolze, D. (1999). "Where can tigers live in the future? A framework for identifying high-priority areas for the conservation of tigers in the wild". In Seidensticker, J.; Christie, S.; Jackson, P. Riding the Tiger: Tiger Conservation in Human Dominated Landscape. London: Cambridge University Press. pp. 254–272. ISBN 978-0521648356.
- Howard, B. C. (2016). "Tiger Numbers Rise for First Time in a Century". National Geographic.
- Daigle, K. (2016). "World's wild tiger count rising for first time in a century". Phys Org. Retrieved 17 April 2016.
- Sanderson, E. W.; Forrest, J.; Loucks, C.; Ginsberg, J.; Dinerstein, E.; Seidensticker, J.; Leimgruber, P.; Songer, M.; Heydlauff, A.; O'Brien, T.; Bryja, G.; Klenzendorf, S.; Wikramanayake, E. (2010). "Setting Priorities for the Conservation and Recovery of Wild Tigers: 2005–2015" (PDF). In Tilson, R.; Nyhus, P. J. Tigers of the World: The Science, Politics and Conservation of Panthera tigris (Second ed.). London, Burlington: Academic Press. pp. 143–161. ISBN 978-0-08-094751-8.
- "Traditional Chinese Medicine". World Wildlife Foundation. Archived from the original on 2012-05-11. Retrieved 3 March 2012.
- Jacobs, Andrew (13 February 2010). "Tiger Farms in China Feed Thirst for Parts". New York Times.
- "Tiger". Big Cat Rescue. Retrieved 7 March 2009.
- "Tigers 'take night shift' to dodge humans". BBC News. 4 September 2012. Retrieved 10 April 2014.
- WWF – Tiger – Overview. Worldwildlife.org (10 August 2011). Retrieved on 27 September 2011.
- Plumer, Brad (2016-04-11). "Wild tiger populations are rebounding for the first time in a century". Vox. Retrieved 2016-04-11.
- "Front Page : Over half of tigers lost in 5 years: census". The Hindu. 13 February 2008. Retrieved 10 June 2010.
- Foster, Peter (30 Aug 2007). "Why the tiger's future is far from bright". The Telegraph. Retrieved 19 September 2018.
- "Tiger Reserves". ENVIS Centre on Wildlife & Protected Areas. Retrieved 19 September 2018.
- Page, Jeremy (5 July 2008). "Tigers flown by helicopter to Sariska reserve to lift numbers in western India". London: The Times. Retrieved 25 May 2010.
- "India Reports Sharp Decline in Wild Tigers". News.nationalgeographic.com. Retrieved 10 June 2010.
- "It's the tale of a tiger, two tigresses in wilds of Sariska". Economictimes.indiatimes.com. 2 March 2009. Retrieved 10 June 2010.
- "Tigers galore in Ranthambhore National Park". Hindu.com. 11 March 2009. Retrieved 10 June 2010.
- Goodrich, J.M.; Miquelle, D.G.; Smirnov, E.M.; Kerley, L.L.; Quigley, H.B.; Hornocker, M.G. (2010). "Spatial structure of Amur (Siberian) tigers (Panthera tigris altaica) on Sikhote-Alin Biosphere Zapovednik, Russia". Journal of Mammalogy. 91 (3): 737–748. doi:10.1644/09-mamm-a-293.1.
- "Amur (Siberian) tiger". World Wildlife Fund. Archived from the original on 2013-11-25. Retrieved 19 December 2007.
- Timothy, E.; Fulbright, D.; Hewitt, G. (2007). Wildlife Science: Linking Ecological Theory and Management Applications. CRC Press. ISBN 978-0-8493-7487-6.
- Miquelle, D.; Darman, Y.; Seryodkin, I. (2011). "Panthera tigris ssp. altaica". The IUCN Red List of Threatened Species. IUCN: e.T15956A5333650. doi:10.2305/IUCN.UK.2011-2.RLTS.T15956A5333650.en.
- Yeh, Emily T. (2012). "Transnational Environmentalism and Entanglements of Sovereignty: The Tiger Campaign Across the Himalayas". Political Geography. 31 (7): 408–418. doi:10.1016/j.polgeo.2012.06.003.
- "Animal Skin Clothes Burned In Tibet After Dalai Lamas Call". The Office of His Holiness the Dalai Lama. 17 February 2006. Archived from the original on 30 October 2010. Retrieved 4 December 2010.
- Franklin, N., Bastoni, Sriyanto, Siswomartono, D., Manansang, J. and R. Tilson (1999). Last of the Indonesian tigers: a cause for optimism, pp. 130–147 in: Seidensticker, J., Christie, S. and Jackson, P. (eds). Riding the tiger: tiger conservation in human-dominated landscapes. Cambridge University Press, Cambridge, ISBN 0-521-64835-1.
- Tilson, R. (1999). Sumatran Tiger Project Report No. 17 & 18: July − December 1999. Grant number 1998-0093-059. Indonesian Sumatran Tiger Steering Committee, Jakarta.
- Nyhus, P., Sumianto and R. Tilson (1999). The tiger-human dimension in southeast Sumatra, pp. 144–145 in: Seidensticker, J., Christie, S. and Jackson, P. (eds). Riding the tiger: tiger conservation in human-dominated landscapes. Cambridge University Press, Cambridge, ISBN 0-521-64835-1.
- Rabinowitz, A. (2009). "Stop the bleeding: implementing a strategic Tiger Conservation Protocol" (PDF). Cat News (51): 30–31. ISSN 1027-2992. Archived from the original (PDF) on 2012-11-09.
- Karanth, K.U.; Nichols, J.D.; Seidensticker, J.; Dinerstein, E.; Smith, J.L.D.; McDougal, C.; Johnsingh, A.J.T.; Chundawat, R.S. (2003). "Science deficiency in conservation practice: the monitoring of tiger populations in India" (PDF). Animal Conservation. 6 (2): 141–146. doi:10.1017/S1367943003003184.
- Gopalaswamy, A. M.; Royle, J. A.; Delampady, M.; Nichols, J. D.; Karanth, K. U.; Macdonald, D. W. (2012). "Density estimation in tiger populations: combining information for strong inference". Ecology. 93 (7): 1741–1751. doi:10.1890/11-2110.1. JSTOR 23225238.
- Caragiulo, A.; Pickles, R. S. A.; Smith, J. A.; Smith, O.; Goodrich, J.; Amato, G. (2015). "Tiger (Panthera tigris) scent DNA: a valuable conservation tool for individual identification and population monitoring". Conservation Genetics Resources. 7 (3): 681–683. doi:10.1007/s12686-015-0476-9.
- Singh, A. (1981). Tara, a tigress. London and New York: Quartet Books. ISBN 978-0-7043-2282-0.
- Menon, S. (17 November 1997). "Tainted Royalty". India Today. Archived from the original on 30 June 2008.
- Bagla, P. (19 November 1998). Indian tiger isn't 100 per cent "swadeshi". The Indian Express.
- Shankaranarayanan, P.; Singh, L. (1998). "Mitochondrial DNA sequence divergence among big cats and their hybrids". Current Science. 75 (9): 919–923.
- Singh, R.K. (2000). Tara: The Cocktail Tigress. Print World, Allahabad.
- Warren, Jane (5 October 2010). "Tiger cubs saved by catwoman". Express.co.uk. Retrieved 12 December 2010.
- "Big Cat Swap Raises Questions". Institute for War and Peace Reporting. 19 May 2010. Retrieved 30 October 2015.
- "Russian tigers to take their stripes to Iran". RT. 28 February 2012. Archived from the original on 2016-01-28. Retrieved 4 January 2016.
- Ewan Palmer (1 March 2012). "Russia Sends Siberian Tigers to Iran to Save Species". International Business Times. Retrieved 23 January 2016.
- Royal Tiger (nom-de-plume) in The Manpoora Tiger – about a Tiger Hunt in Rajpootanah. (1836) Bengal Sporting Magazine, Vol IV. reproduced in The Treasures of Indian Wildlife
- Harding, Andrew (23 September 2006). "Beijing's penis emporium". BBC News. Retrieved 7 March 2009.
- Nowell, K. (2007). "Asian big cat conservation and trade control in selected range States: evaluating implementation and effectiveness of CITES Recommendations" (PDF). TRAFFIC International. Retrieved 3 April 2014.
- "Chinese tiger farms must be investigated". WWF. 24 April 2007. Archived from the original on 5 July 2007. Retrieved 7 March 2009.
- "WWF: Breeding tigers for trade soundly rejected at CITES". Panda.org. 13 June 2007. Archived from the original on 17 March 2008. Retrieved 7 March 2009.
- Jackson, Patrick (29 January 2010). "Tigers and other farmyard animals". BBC News. Retrieved 29 January 2010.
- "Conservationists shocked by Chinese admission of tiger skin selling". Shanghai Sun. Archived from the original on 14 July 2014. Retrieved 12 July 2014.
- Singh, Kesri (1959). The tiger of Rajasthan. Hale.
- Byrne, Peter (2002). Shikari Sahib. Pilgrims Publishing. pp. 291–292. ISBN 978-81-7769-183-2.
- Corbett, J. (1944). Man-Eaters of Kumaon. Bombay: Oxford University Press.
- The Man-Eater of Segur", from Nine Man-Eaters and One Rogue, Kenneth Anderson, Allen & Unwin, 1954
- "Famous 'man-eater' at Calcutta". Underwood & Underwood. 1903. Retrieved 9 April 2014.
- "Climate change linked to Indian tiger attacks". Environmental News Network. 20 October 2008. Retrieved 27 October 2008.
- Montgomery, Sy (2009). Spell of the Tiger: The Man-Eaters of Sundarbans. Chelsea Green Publishing. pp. 37–38. ISBN 978-0-395-64169-9.
- "Calvin Klein's Obsession Could Be The Trick To Catching A Tiger". NPR. 14 October 2018. Retrieved 18 October 2018.
- Kumar, Hari; Gettleman, Jeffrey (3 November 2018). "Man-Eating Tiger Is Shot Dead in India". The New York Times. New Delhi. Retrieved 22 November 2018.
- Nyhus, P. J.; Tilson, R. L.; Tomlinson, J. L. (2003). "Dangerous animals in captivity: Ex situ tiger conflict and implications for private ownership of exotic animals". Zoo Biology. 22 (6): 573–586. doi:10.1002/zoo.10117.
- Ethirajan, A. (2012). "Rogue tigress 'terrorises Bangladesh villagers'". BBC News. BBC.
- Auguet, Roland (1994). Cruelty and civilization: the Roman games. Psychology Press. pp. 83–85. ISBN 978-0-415-10453-1.
- Baker, William (1988). Sports in the Western World. University of Illinois Press. p. 33. ISBN 978-0-252-06042-7.
- Baratay, Eric (2004). Zoo: A History of Zoological Gardens in the West. Reaktion Books. p. 19. ISBN 978-1-86189-208-9.
- Baratay, Eric (2004). Zoo: A History of Zoological Gardens in the West. Reaktion Books. p. 122. ISBN 978-1-86189-208-9.
- Ruppel, Louis (1951). "Collier's, Volume 127". Crowell-Collier Publishing Company: 61.
- Nowell, K., Ling, X. (2007) Taming the tiger trade: China's markets for wild and captive tiger products since the 1993 domestic trade ban. TRAFFIC East Asia, Hong Kong, China.
- Wildlife Watch, Group (2011). "Less than 3,000 Pet Tigers in America". Wildlife Times. 5 (37): 12–13.
- "Summary of State Laws Relating to Private Possession of Exotic Animals". Born Free USA. Retrieved 12 December 2010.
- Luo, S.; Johnson, W. E.; Martenson, J.; Antunes, A.; Martelli, P.; Uphyrkina, O.; Traylor-Holzer, K.; Smith, J. L.D.; O'Brien, S. J. (2008). "Subspecies Genetic Assignments of Worldwide Captive Tigers Increase Conservation Value of Captive Populations" (PDF). Current Biology. 18 (8): 592–596. doi:10.1016/j.cub.2008.03.053. PMID 18424146. Archived from the original (PDF) on 25 April 2012.
- Sanderson, James; Moulton, Michael (18 August 1998). Wildlife Issues in a Changing World (Second ed.). CRC Press. p. 133. ISBN 978-1-4398-3262-2.
- Xavier, N. (2010). "A new conservation policy needed for reintroduction of Bengal tiger-white". Current Science. 99 (7): 894–895.
- "Endangered tiger earns its stripes as the world's most popular beast". The Independent. 6 December 2004. Archived from the original on 20 January 2008. Retrieved 7 March 2009.
- Cooper, J. C. (1992). Symbolic and Mythological Animals. London: Aquarian Press. pp. 161–62. ISBN 978-1-85538-118-6.
- "Tiger's Tail". Cultural China. Archived from the original on 29 March 2014. Retrieved 29 March 2014.
- Chan-eung, Par (1999). A Tiger by the tail and other Stories from the heart of Korea. Libraries Unlimited.
- Standard Korean Language Dictionary
- Sivkishen (2014). Kingdom of Shiva. New Delhi: Diamond Pocket Books Pvt Ltd. p. 301.
- Balambal, V. (1997). "19. Religion – Identity – Human Values – Indian Context". Bioethics in India: Proceedings of the International Bioethics Workshop in Madras: Biomanagement of Biogeoresources, 16–19 January 1997. Eubios Ethics Institute. Retrieved 8 October 2007.
- Summers, M. (1933). The Werewolf in Lore and Legend (2012 ed.). Mineola: Dover Publications. p. 21. ISBN 978-0-517-18093-8.
- Newman, Patrick (2012). Tracking the Weretiger: Supernatural Man-Eaters of India, China and Southeast Asia. McFarland. pp. 96–102. ISBN 978-0-7864-7218-5.
- Krishna-Dwaipayana Vyasa. "SECTION LXVIII". The Mahabharata. Translated by Ganguli, K. M. Retrieved June 15, 2016 – via Internet Sacred Text Archive.
- Green, S. (2006). Tiger. Reaktion Books. pp. 72–73, 125–27. ISBN 978-1861892768.
- Castelli, Jean-Christopher (2012). The Making of Life of Pi: A Film, a Journey. Harper Collins. ISBN 978-0062114136.
- Booth, Martin (1991) Carpet Sahib; A Life of Jim Corbett, New York: Oxford University Press, ISBN 0-19-282859-2, p. 230.
- Kuznets, L. R. (1994). When Toys Come Alive: Narratives of Animation, Metamorphosis, and Development. Yale University Press. p. 54. ISBN 978-0300056457.
- Gifford, C. (2005). Advertising & Marketing: Developing the Marketplace. Heinemann-Raintree Library. pp. 34–35. ISBN 978-1403476517.
- "The history of advertising in quite a few objects: 43 Esso tiger tails". Campaign. 27 September 2012. Retrieved 29 March 2014.
- Hermann Kulke, K Kesavapany, Vijay Sakhuja (2009) Nagapattinam to Suvarnadwipa: Reflections on the Chola Naval Expeditions to Southeast Asia, Institute of Southeast Asian Studies, p. 84.
- Singh, U. (2008). A History of Ancient and Early Medieval India: From the Stone Age to the 12th Century. Pearson Education, India.
- Daya Somasundaram (11 February 2014) Scarred Communities: Psychosocial Impact of Man-made and Natural Disasters on Sri Lankan Society, SAGE Publications India, p. 73.
- "National Animal". Government of India Official website. Archived from the original on 2012-05-11.
- DiPiazza, F. (2006). Malaysia in Pictures. Twenty-First Century Books. p. 14. ISBN 978-0-8225-2674-2.
- John Hampden Porter (1894). "The Tiger". Wild beasts: a study of the characters and habits of the elephant, lion, leopard, panther, jaguar, tiger, puma, wolf, and grizzly bear. New York: C. Scribner's sons. pp. 196–256.
- Sankhala, Kailash (1997). Indian Tiger. New Delhi: Roli Books Pvt Limited. ISBN 978-81-7437-088-4.
|Wikiquote has quotations related to: Tigers|
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|Wikispecies has information related to Panthera tigris|
- Species portrait Tiger; IUCN/SSC Cat Specialist Group
- Biodiversity Heritage Library bibliography for Panthera tigris
- Tiger Stamps: Tiger images on postage stamps from many different countries
- Year of the tiger. Video collection on occasion of the Year of the Tiger, 2010. BBC.
- Video clips. BBC archive on Wildlife Finder.
- "Is this the last chance to save the tiger?". 19 November 2010. Pralad Yonzon. The Kathmandu Post.
- Marshall, A. (26 February 2010). "Tale of the Cat". Time.
- Mohan, V. "India's tiger population increases by 30% in past three years; country now has 2,226 tigers". The Times of India.