55 sites in North America
BirdSource
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Joint project of National Audubon and the Cornell Lab of Ornithology with the complete Christmas Bird Count database, Project FeederWatch, BirdCast, HawkWatch results, Great Backyard Bird Count, and feature articles.
http://www.birdsource.org/
BirdIQ
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Site from ConocoPhillips with basic information on birds, bird watching, and feeding for students, teachers, and anyone interested in learning more.
http://www.birdiq.com/
Birdzilla
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Sightings, newsletter, articles, species profiles including the complete text of Bent's Life Histories, bird lists, photos, backyard birding, and shopping.
http://www.birdzilla.com/
eBird
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Project developed by the Cornell Lab of Ornithology and the National Audubon Society, provides a simple way to keep track of the birds you see anywhere in North America.
http://www.ebird.org/
See also