Science Reference

Bird

Birds are bipedal, warm-blooded, oviparous 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..

For more information about the topic Bird, read the full article at Wikipedia.org, or see the following related articles:

Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Bird at Wikipedia.org. See the Wikipedia copyright page for more details.

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