Fifty-sixth supplement to the American Ornithologists' Union: Check-list of North American Birds
This is the 15th supplement since publication of the 7th edition of the Check-list of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between May 15, 2014, and April 15, 2015, by the AOU's Committee on Classification and Nomenclature - North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (AOU 2000).
The Auk↗