↑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
↑Peters, James L. (1934) , Check-list of Birds of the World, vol. 2
↑ 8.08.1Banks, Richard C., C. Cicero, J. L. Dunn, A. W. Kratter, P. C. Rasmussen, J. V. Remsen, Jr., et al. (2002) Forty-third Supplement to the American Ornithologists' Union Check-List of North American Birds, The Auk, vol. 119, no. 3