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A step-by-step parametric search engine for identifying birds in North America. Site includes illustrations, calls, and links.
http://www.whatbird.com/
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Virtual birding tours of North America's leading hot spots, articles, rare bird alerts, e-mail discussion group archives, and photo galleries.
http://www.virtualbirder.com/
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Information about the Sibley Guide to Birds, including updates, subspecies, and a gallery of David Sibley's paintings.
http://www.sibleyguides.com/
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An association supported by federal, state, and regional governments dedicated to the preservation of bird species that summer in North America and winter in South America. Volunteer info and species data.
http://www.partnersinflight.org/
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Photographs of birds from the ABA North American region, with birding and photograph links for beginners to experts.
http://www.wildbirdphotos.com/
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Information about the Flight Calls of Migratory Birds (Eastern North American Landbirds) CD-ROM and the Dickcissel night flight call monitoring project.
http://www.oldbird.org/
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Photographs of many species by Peter LaTourrette.
http://www.birdphotography.com/
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Notes, distribution maps, and photos of current rarities. Includes gull section and bird quizzes.
http://www.birdinfo.com/
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Subscription reporting service on rare birds in the United States and Canada.
http://www.narba.org/
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Photograph album, migration maps, attracting and feeding tips, species accounts, and articles.
http://www.hummingbirds.net/
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Daily reports of migrant hawks seen at many North American hawk watch sites.
http://hawkcount.org/
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Monitors raptor migration throughout North America.
http://www.hmana.org/
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Full text of some of the species accounts of more common birds by Arthur Cleveland Bent from his classic Life Histories of North American Birds (1919-1968).
http://birdsbybent.com/
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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/
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A membership institution interpreting and conserving the earth's biological diversity through research, education, and citizen science focused on birds.
http://www.birds.cornell.edu/
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