The Annual Christmas Bird Count is sponsored by Nation Audubn Society. The Christmas Bird Count occurs December 14 to January 5 every season.  It is the nation’s longest-running community science bird project fuels Audubon’s work throughout the year. The data collected by Christmas Bird Count (CBC) participants over the years provide a wealth of information to researchers interested in the long-term study of early winter bird populations across North America. The CBC is a citizen science project that involves counting birds in circles across North America. Participants count the birds they see or hear within the circle on one day. Each circle compiler(s) will choose a single calendar day within those dates and the CBC birding is done on only one calendar day for each circle

Learn about the History of Christmas Bird Count
How scientist around the world use the CBC data
Summary of all CBC from 1991 – Present
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