 eBird
eBird, a project developed by the Cornell Lab of Ornithology and the National Audubon Society, provides a simple way for you to keep track of the birds you see anywhere in North America.
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 The Great Backyard Bird Count
The Great Backyard Bird Count provides us with a late winter snapshot of the distribution and abundance of birds across the United States and Canada.
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 Project FeederWatch
Project FeederWatch is a winter-long survey of birds that visit feeders in backyards, and at nature centers, community areas, and other locales in North America.
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 Birds in Forested Landscapes
Birds in Forested Landscapes links biologists and citizen scientists in an effort to access the habitat and conservation needs of forest-dwelling birds throughout North America.
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 The Birds of North America Online
The Birds of North America Online is the most comprehensive and up-to-date reference covering the life histories of North American birds accsesible to anyone with access to the Internet.
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 The Pennsylvania Breeding Bird Atlas
The Pennsylvania Breeding Bird Atlas is a collective effort of thousands of individuals over five seasons, and will result in the best and most extensive database for Pennsylvania's breeding birds ever assembled.
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 The Land Bird Monitoring Program
The Land Bird Monitoring Program is a region-wide landbird-monitoring program developed to better understand the habitat relationships of landbirds that breed in the northern Rocky Mountains.
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 Breeding Biology Research & Monitoring Database
The Breeding Biology Research and Monitoring Database (BBIRD) program is a national, cooperative program that uses standardized field methodologies for studies of nesting success and habitat requirements of breeding birds.
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