The nation's longest-running citizen science bird project fuels Audubon science year-round
Photo: Camilla Cerea/National Audubon Society
Everything you need to know to run your Christmas Bird Count circle
Regional summaries for the 115th Christmas Bird Count are available in online form through the links below.
You can add to a century of citizen science data by signing up for a count near you
Hundreds of studies by scientists around the world have put CBC data to use
From the very first count in 1900 through today