. . . . . . . "1970-01-01T00:00:00Z"^^ . . "Aythya valisineria" . . "Macoma balthica" . . "Perry, M.C. and F.M. Uhler. 1988. Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay. Estuaries 11:57-67." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .