. . . . . . . "1920-01-01T00:00:00Z"^^ . . "Anas crecca" . . "Chara" . . "Mabbott, D.C. 1920. Food habits of seven species of American shoal-water ducks. U.S. Department of Agriculture Bulletin 862:1-67." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .