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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 American birds

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Jan Smith reveals her research into Morgellons Disease

BirdSource, a partnership of The Cornell Lab of Ornithology and the National Audubon Society offers insight into the dynamics of North American Bird populations with projects that track migration, irruption, and foraging behavior.

Hummingbirds: The best site about attracting and studying hummingbirds, including feeders, banding, and student projects.

wiseGEEK: clear answers for common questions