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Birds are a group of warm-blooded vertebrates constituting the class Aves (Latin:), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
This article lists living orders and families of birds. In total there are about 10,000 species of birds described worldwide, though one estimate of the real number places it at almost twice that. [1] The order passerines (perching birds) alone accounts for well over 5,000 species.
In this list of birds by common name 11,278 extant and recently extinct (since 1500) bird species are recognised. [1] Species marked with a "†" are extinct.
The bald eagle is the national bird of the United States. The California condor is one of North America's most endangered birds. A comprehensive listing of all the bird species confirmed in the United States follows. It includes species from all 50 states and the District of Columbia as of July 2022.
Birds (Aves) are a group of animals with backbones. They evolved from dinosaurs. Technically, birds are dinosaurs. [2] Birds are warm blooded. Their feathers help prevent loss of body heat. [3] [4] Modern birds do not have teeth. They have beaked jaws. Birds lay hard-shelled eggs. They have a high metabolic rate and a strong but lightweight ...
Kiwi (/ ˈ k iː w iː / KEE-wee) [4] are flightless birds endemic to New Zealand of the order Apterygiformes.The five extant species fall into the family Apterygidae (/ ˌ æ p t ə ˈ r ɪ dʒ ə d iː /) and genus Apteryx (/ ˈ æ p t ər ɪ k s /). [5] Approximately the size of a domestic chicken, kiwi are the smallest ratites (which also include ostriches, emus, rheas, cassowaries and the ...
List of bird genera concerns the chordata class of aves or birds, characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, and a high metabolic rate. Restless flycatcher in the downstroke of flapping flight
Bird, any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from other animals. They are warm-blooded vertebrates more related to reptiles than mammals.
Birds are feathered theropod dinosaurs and constitute the only known living dinosaurs. Likewise, birds are considered reptiles in the modern cladistic sense of the term, and their closest living relatives are the crocodilians.
Among all birds, male hummingbirds have the widest diversity of plumage color, particularly in blues, greens, and purples. [5] Hummingbirds are the smallest mature birds, measuring 7.5–13 cm (3–5 in) in length.