Sixty-first Supplement to the American Ornithological Society's Check-list of North American Birds. (30th June 2020) - Chesser, R Terry; Billerman, Shawn M; Burns, Kevin J; Cicero, Carla; Dunn, Jon L; Kratter, Andrew W; Lovette, Irby J; Mason, Nicholas A; Rasmussen, Pamela C; Remsen, J V; Stotz, Douglas F; Winker, Kevin