birds silhouettes over gray background

>For other uses, see Bird (disambiguation). Many - see section below. Birds are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu. Depending on taxonomic viewpoint, there are about 8,800–10,200 living bird species (plus about 120–130 that have become extinct in the span of human history) in the world, making them the most diverse class of terrestrial vertebrates. See more at Wikipedia.org...

>This article is about the bird. For other uses of the word "eagle", see Eagle (disambiguation). Several, see below. *see Accipitriformes for family list Eagles are large birds of prey, which are found mainly in the Old World, with only two species (Bald Eagle and Golden Eagle) in North America, a few in South America and two, (White-bellied Sea Eagle and Wedge-tailed Eagle), in Australia. They are members of the bird order Falconiformes, family Accipitridae and belong to several different genera, not necessarily closely related to each other. See more at Wikipedia.org...