USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Christmas Bird Count

About this Project, Network or Partner
Each November, birders interesting in participating in the CBC can sign up and join in through the Audubon website. From December 14 through January 5 each year tens of thousands of volunteers throughout the Americas brave snow, wind, or rain, and take part in the effort. Audubon and other organizations use data collected in this long-running wildlife census to assess the health of bird populations, and to help guide conservation action.
Geographic coverage: 
Western Hemisphere
Taxonomic groups: 
Duration of Monitoring : 
Since 1900
Contact E-mail:


United States