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House sparrow, Passer domesticus

The following outline is provided as an overview of and topical guide to birds:

Birds (class Aves) – winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most varied of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich.

What type of thing is a birdEdit

A bird can be described as all of the following:

  • Life form – entity or being that is living or alive.
    • Animal – multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. Most animals are motile, meaning they can move spontaneously and independently.

Biological classificationEdit

 
Cladogram showing the most recent classification of Neoaves, based on several phylogenetic studies.

Nature of birdsEdit

Bird

Bird anatomyEdit

 
External anatomy (topography) of a typical bird: 1 Beak, 2 Head, 3 Iris, 4 Pupil, 5 Mantle, 6 Lesser coverts, 7 Scapulars, 8 Coverts, 9 Tertials, 10 Rump, 11 Primaries, 12 Vent, 13 Thigh, 14 Tibio-tarsal articulation, 15 Tarsus, 16 Feet, 17 Tibia, 18 Belly, 19 Flanks, 20 Breast, 21 Throat, 22 Wattle, 23 Eyestripe

Bird anatomy

Bird behaviorEdit

Bird behavior

Types of birdsEdit

OrdersEdit

FamiliesEdit

SubfamiliesEdit

GeneraEdit

History of birdsEdit

Study of birdsEdit

AvicultureEdit

Bird diseases and parasitesEdit

Threats and conservationEdit

Persons influential in the field of birdsEdit

Birds in cultureEdit

See alsoEdit

ReferencesEdit

External linksEdit