. . . . . . . . "1987-11-01T00:00:00Z"^^ . . "Aythya valisineria" . . "Sagittaria latifolia" . . "Hohman, W.L., D.W. Woolington, and J.H. Devries. 1990. Food habits of wintering canvasbacks in Louisiana. Canadian Journal of Zoology 68:2605-2609." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .