Welcome Northern Saw-whet Owl photo by Jim Weaver/CLO

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!

Recent BNA Updates

Update (April 2015) New Fully Revised Species Accounts-- Tufted Titmouse was revised by Gary Ritchison. The photo, video, and  audio galleries have been updated. Also this month, Eastern Towhee was revised by BNA staff with input from Peter Lowther. This account's photo, video and audio galleries were updated. The account for Red-headed Woodpecker was revised by Barbara Frei. This account's photo, video and audio galleries were updated.

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Update (March 2015) New Fully Revised Species Accounts-- Dusky Flycatcher was revised by Maria Elena Pereyra. The photo, video, and  audio galleries have been updated. Also this month, Yellow Rail was revised by Lionel Leston. This account's photo, video and audio galleries were updated. The account for Buff-bellied Hummingbird was revised by BNA staff. This account's photo, video and audio galleries were updated.

Update (February 2015) New Fully Revised Species Accounts-- Eastern Bluebird has been revised by Patricia Gowaty. This account's photo, video and audio galleries were updated. Also this month, Common Pauraque was revised by BNA staff. This account's photo, video and audio galleries were updated. The account for Snail Kite was revised by Brian Reichert, Christopher Cattau, and Robert Fletcher, Jr. The photo, video, and  audio galleries have all been updated.

Complete Archives of News & Updates


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