The CBC database is the repository of early winter bird observations recorded since 1900. Currently there are over 2100 count circles submitted each year (as of 2008). The database provides information for compilers, regional editors, Audubon conservation staff, ornithologists, academic researchers, federal, state and local wildlife and land planning agencies, educators, birders, chapters, ornithological societies, and the general public to learn about citizen science, bird distribution and population trends.
TEAM MEMBERS

National Audubon Society
Author

Bird Studies Canada
Contributor

North American Breeding Bird Survey
Contributor

Cornell University
Contributor

Frank Chapman
Contributor
National Audubon Society
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