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Welcome to the website for the Colorado Breeding Bird Atlas II Project (Atlas II). Atlas II was initiated in 2007 and will update the original Colorado Breeding Bird Atlas, which was initiated 20 years earlier, in 1987. The purpose of Atlas II is to collect data on the distribution, abundance, habitat use, and breeding phenology of the avifauna breeding in Colorado, and to compare that data to data collected during the first Atlas project.

For more information on the project, click on one of the tabs to the left.


Download the first Colorado Breeding Bird Atlas book here.



 San Juan Institute of Natural and
    Cultural Resources

 Fort Lewis College
 Durango, CO  81301
 (970) 247-7245


Photos by Catherine Ortega

   Home Page

   Project Background

   Atlas II Partners

   Atlas II Regions

   Manuals/Field Forms

   Enter Field Data

This website is hosted by:

Fort Lewis College

   Photo Gallery


   Become a Volunteer


   Make a Gift

   Contact Us

Cooper's hawk nest with chicks.  Photo by Lynn Wickersham.

Home Page      Project Background      Atlas II Partners      Atlas II Regions      Manuals/Field Forms     
Enter Field Data      Photo Gallery      FAQs      Become a Volunteer      News and Events      Make a Gift      Contact Us