Welcome Ladder-backed Woodpecker photo by Rick & Nora Bowers/BowersPhoto.com

Welcome

In two centuries of American ornithology, The Birds of North America (BNA) is only the fourth comprehensive reference covering the life histories of North America’s breeding birds. Following in the footsteps of Wilson, Audubon, and Bent, BNA provides a quantum leap in information beyond what those historic figures were able to assemble. The print version of BNA was completed in 2002 – 18 volumes, 18,000 pages -- a joint 10 year project of the American Ornithologists' Union, the Cornell Lab of Ornithology, and the Academy of Natural Sciences. Now as an online project of the Cornell Lab of Ornithology, BNA is becoming a living resource. Account contents are updated frequently, with contributions from researchers, citizen scientists, and designated reviewers and editors. In addition, BNA Online contains image and video galleries showing plumages, behaviors, habitat, nests and eggs, and more. And most online BNA accounts now feature recordings of the songs and calls of their species, recordings selected from the extensive collection of Cornell's Macaulay Library of Natural Sounds. Future work will enhance BNA’s audio and video contributions, speed revisions via efforts coordinated online, and provide a significant boost to the number of photos available to subscribers. Stay tuned!

What's New in BNA

Update - Now Featuring eBird data-- Over the next year, BNA will be sequentially introducing eBird data to the 'Distribution' pages.  See an example here: American Robin.

New Fully Revised Species Maps--
Over the next year, BNA will be sequentially introducing entirely updated species distribution maps. These maps feature up-to-date distribution information and an revised color scheme.  See an example here: Northern Mockingbird.

Update (October) New Fully Revised Species Accounts-- Steller's Jay has been revised by Lauren Walker. This account's photo, video and audio galleries were updated. Also this month, American Wigeon was revised by Anne Mini, Erin Harrington, Emily Rucker, and Bruce Dugger. This account's photo, video and audio galleries were updated. The account for Sprague's Pipit was revised by Stephen Davis, and features updates to the photo, audio, and video galleries have all been updated. Roseate Tern has been revised by Ian Nisbet. This account's photo, audio, and video galleries have all been updated.

Are you an AOU member trying to login to BNA? Please read this first.

Update (September) New Fully Revised Species Accounts-- Semipalmated Plover has been revised by Erica Nol. This account's photo, video and audio galleries were updated. Also this month, Northern Bobwhite was revised by Leonard Brennan, Fidel Hernández, and Damon Williford. This account's photo, video and audio galleries were updated. The account for Great Crested Flycatcher was revised by Karl Miller, and features updates to the photo, audio, and video galleries have all been updated. Boat-tailed Grackle has been revised by Will Post. This account's photo, audio, and video galleries have all been updated.

Complete Archives of News & Updates


Try before you Subscribe

Explore these free, all-access accounts to see if BNA is right for you. Click on a photo to go to the account.