↑Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes (2003) , Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
↑Banks, R. C., R. W. McDiarmid, and A. L. Gardner (1987) Checklist of Vertebrates of the United States, the U.S. Territories, and Canada, Resource Publication, no. 166
↑American Ornithologists' Union (1998) , Check-list of North American Birds, 7th Edition
↑ 6.06.1American Ornithologists' Union (2002) Forty-third supplement to the American Ornithologists' Union check-list of North American birds, The Auk, vol. 119, no. 3
