Pamela C. Rasmussen

Fifty-First Supplement to the American Ornithologists' Union Check-List of North American Birds

Kevin Winker, Carla Cicero, Jr. J. V. Remsen, 1997 .

Forty-Ninth Supplement to the American Ornithologists' Union Check-List of North American Birds

D. Stotz, R. Chesser, R. Banks, 1993 .