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Old Bird, Inc. (Popularity:  )
http://www.oldbird.org/
Information about the Flight Calls of Migratory Birds (Eastern North American Landbirds) CD-ROM and the Dickcissel night flight call monitoring ...
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eBird (Popularity: )
http://www.ebird.org/
Project developed by the Cornell Lab of Ornithology and the National Audubon Society, provides a simple way to keep track ...
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Cornell Laboratory of Ornithology (Popularity: )
http://www.birds.cornell.edu/
A membership institution interpreting and conserving the earth's biological diversity through research, education, and citizen science focused on birds.
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North American Bird Notes (Popularity: )
http://www.birdinfo.com/
Notes, distribution maps, and photos of current rarities. Includes gull section and bird quizzes.
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Online Sibley Guide to Birds (Popularity: )
http://sibleyguidetobirds.com/
A subscription-based interactive guide to the birds of North America, based on the Sibley Guides.
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HawkCount (Popularity: )
http://hawkcount.org/
Daily reports of migrant hawks seen at many North American hawk watch sites.
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Familiar Birds (Popularity: )
http://birdsbybent.com/
Full text of some of the species accounts of more common birds by Arthur Cleveland Bent from his classic Life ...
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Boreal Songbird Initiative (Popularity: )
http://www.borealbirds.org/
Dedicated to educating birdwatchers and naturalists about the importance of the boreal forest of North America to migratory birds.
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Sibley Guides (Popularity: )
http://www.sibleyguides.com/
Information about the Sibley Guide to Birds, including updates, subspecies, and a gallery of David Sibley's paintings.
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Birdfilms.com (Popularity: )
http://birdfilms.com/
Videos and DVDs on the lives and natural habitats of North American birds by Michael Male and Judy Fieth.
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Partners in Flight (Popularity: )
http://www.partnersinflight.org/
An association supported by federal, state, and regional governments dedicated to the preservation of bird species that summer in North ...
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Hummingbirds (Popularity: )
http://www.hummingbirds.net/
Photograph album, migration maps, attracting and feeding tips, species accounts, and articles.
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Patuxent - Bird Population Studies (Popularity: )
http://www.mbr-pwrc.usgs.gov/
Comprehensive data on North American birds, including the Breeding Bird Survey, Christmas Bird Count trends, migratory bird projects, the Bird ...
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Hawk Migration Association of North America (Popularity: )
http://www.hmana.org/
Monitors raptor migration throughout North America.
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On Silent Wings Bird Photography (Popularity: )
http://www.wildbirdphotos.com/
Photographs of birds from the ABA North American region, with birding and photograph links for beginners to experts.
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The Virtual Birder (Popularity: )
http://www.virtualbirder.com/
Virtual birding tours of North America's leading hot spots, articles, rare bird alerts, e-mail discussion group archives, and photo galleries.
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North America Rare Bird Alert (Popularity: )
http://www.narba.org/
Subscription reporting service on rare birds in the United States and Canada.
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Birdwatching (Popularity: )
http://www.birdwatching.com/
Frequently asked questions, birding tips, articles, and store.
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