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Class Aves
Birds are vertebrates with feathers, modified for flight and for active metabolism. Birds are a monophyletic lineage, evolved once from a common ancestor, and all birds are related through that common origin. More >>
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Bird - Wikipedia

en.wikipedia.org/wiki/Bird

Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of ...

Online bird guide, bird ID help, life history, bird sounds from Cornell

www.allaboutbirds.org/

Comprehensive guide to North American birds and bird watching from the Cornell Lab of Ornithology. Includes Bird Guide with identification, life history, sound ...

Search for a bird by entering name, description, and keywords, All ...

www.allaboutbirds.org/guide/

Use our Bird Guide to identify birds, learn about the life history, listen to the sounds, and watch bird behavior on video--the most comprehensive guide to North ...

Birds - NYS Dept. of Environmental Conservation

www.dec.ny.gov/animals/271.html

New York State is home to a variety of bird species. Besides information on specific birds and endangered species of birds, the following information and tools ...

Birds, Bird Pictures, Wild Birds - National Geographic

animals.nationalgeographic.com/animals/birds/

Learn all you wanted to know about birds with pictures, videos, photos, facts, and news from National Geographic.

Guide to North American Birds | Audubon

www.audubon.org/bird-guide

Photo: Mark Eden/Great Backyard Bird Count. Search ... Photography sourced in part from VIREO, the worldwide bird photography ... Some of Our Favorite Birds ...

Birds | Audubon

www.audubon.org/birds

After significant declines in population during much of the 20th century, our national symbol has made a comeback in many areas since the 1970s. (Photo: Jan ...

American Bird Conservancy I Bringing Back the Birds

abcbirds.org/

American Bird Conservancy is the Western Hemisphere's bird conservation specialist. We get results for birds throughout the Americas.

Birds Pictures | Types Of Birds | Bird Identification | San Diego Zoo ...

kids.sandiegozoo.org/animals/birds

Find information on birds courtesy of the San Diego Zoo.