. . . . . . . . "1971-12-01T00:00:00Z"^^ . . "Anas hottentota" . . "Ludwigia" . . "Douthwaite, R.J. 1977. Filter-feeding ducks of the Kafue Flats, Zambia, 1971-1973. Ibis 119:44-66." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .