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
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
Read how the count started, and how the data is used today
Peruse the printed records of past Christmas Bird Count or find a full bibliography for American Birds and Bird Lore.