"Canvasback" . . "Anatidae" . "Aves" . . "Chordata" . . . . . . . "(A. Wilson 1814)" . . . . . "Aythya valisineria (A. Wilson 1814)" . . . "Aythya" . "Aythya valisineria" . "Animalia" . "Anseriformes" . . . . .