↑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
↑American Ornithologists' Union (1997) Forty-first supplement to the American Ornithologists' Union Check-list of North American Birds, The Auk, vol. 114, no. 3
↑American Ornithologists' Union (2006) Forty-seventh supplement to the American Ornithologists' Union Check-list of North American Birds, The Auk, vol. 123, no. 3
