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Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), 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.
- Skeleton
Bird anatomy, or the physiological structure of birds'...
- Ornithurae
Ornithurae (meaning "bird tails" in Greek) is a natural...
- Log In
We would like to show you a description here but the site...
- Passeriformes
A passerine (/ ˈ p æ s ə r aɪ n /) is any bird of the order...
- Bee Hummingbird
Description. The bee hummingbird is the smallest living...
- Avifauna (Disambiguation)
Vogelpark Avifauna, a bird park in Alphen aan den Rijn,...
- Red-Crested Turaco
It is a frugivorous bird endemic to western Angola. Its call...
- Ichthyornis
Ichthyornis (meaning "fish bird", after its fish-like...
- Apterygiformes
Kiwi have a highly developed sense of smell, unusual in a...
- Ornithothoraces
Ornithothoraces is a group of avialan dinosaurs that...
- Skeleton
List of birds. Penguins. Ostriches. This article lists living orders and families of birds. The links below should then lead to family accounts and hence to individual species. The passerines (perching birds) alone account for well over 5,000 species. In total there are about 10,000 species of birds described worldwide, though one estimate of ...
Birds live all over the world. They range in size from the 5 cm (2 in) bee hummingbird to the 2.70 m (9 ft) ostrich. There are about ten thousand species of birds. More than half of these are passerines, or perching birds. Birds have wings. The wings develop differently in different species.
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. Species confirmed in other U.S. territories are also included with other "as of" dates.
In this list of birds by common name, a total of 10,976 extant and recently extinct (since 1500) bird species are recognised. Species marked with a "†" are extinct. [1] This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.
The present scientific consensus is that birds are a group of maniraptoran theropod dinosaurs that originated during the Mesozoic Era . A close relationship between birds and dinosaurs was first proposed in the nineteenth century after the discovery of the primitive bird Archaeopteryx in Germany.
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