Explore Christmas Bird Count Data

The Christmas Bird Count has amassed more than a century of data, providing a powerful look at the long-term health and status of bird populations across North America. Whether you are a curious birder, a professional scientist, or a conservationist, these resources allow you to dive deep into the numbers. 

Christmas Bird Count Data Portal 

Visit our CBC Product Portal to explore the data collected by generations of community scientists. This portal is the central hub for: 

• Raw Data & Species Population Trends: View more than 120 years of historical results and see how bird populations are shifting. 

• Data Requests: Access specific datasets for research and conservation purposes. 

• Data Terms of Use: Review our guidelines for the responsible use and citation of CBC data to ensure the highest level of data integrity.  

Christmas Bird Count Bibliography 

The CBC is one of the most significant sources of ornithological data in the world. To date, more than 300 peer-reviewed articles have been published using CBC data, covering topics like community ecology, bird distribution, and population dynamics. Explore the CBC Bibliography to see how scientists and federal agencies use your count results to make informed decisions about bird conservation. 

Are you a researcher who has published work using CBC data? If you plan to use CBC data assets in research, peer-reviewed publications, or public reports or have already published findings, please notify Audubon using the online data use form.   

Annual Summaries (1901–Present) 

Since the very first count in 1900, the results of the CBC have been meticulously documented. You can browse the annual CBC summaries to see regional highlights and feature articles from every season. 

• Modern Reports: View digital summaries from the 113th CBC to the present, featuring interactive content and the latest trends. 

• Historical Records: Access digitized copies of Bird-Lore (the original CBC publication) and historical summaries from Audubon Field Notes and American Birds.