. . . . . . . "1977-04-01T00:00:00Z"^^ . . "Aythya valisineria" . . "Dytiscidae" . . "Austin, J.E., J.R. Serie, and J.H. Noyes. 1990. Diet of canvasbacks during breeding. Prairie Naturalist 22:171-176." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .