Birds of North America (BNA) is the most comprehensive reference for the life histories of over 760 bird species that breed in the United States and Canada. Species accounts are written by ornithologists and other experts and are an essential reference for anyone with an advanced interest in birds. In existence since 1992, the new online version is a collaboration between the Cornell Lab of Ornithology, American Ornithological Society and the Macaulay Library. All species accounts are accompanied by bird sounds, images, and video. Discover breeding areas or migration paths using the distributional maps and model output generated by eBird which are also part of the accounts. Check out the species account for the American Kestrel.