Birds of North America
From Wikipedia, the free encyclopedia
Birds of North America was first published as a series of 716 printed booklets, made available in no particular order from 1992 through 2003.
It is now available as an on-line resource, including sound and video content, produced by the Cornell Lab of Ornithology and the American Ornithologists' Union as : Birds of North America online available for institutional subscribers, at a price depending on the nature and size of the institution, and also to individual subscribers at a much lower rate.