. . . . . . . . "1974-01-01T00:00:00Z"^^ . . "Aythya marila" . . "Gastropoda" . . "Vermeer, K. and C.D. Levings. 1977. Populations, biomass and food habits of ducks on the Fraser Delta intertidal area, British Columbia. Wildfowl 28:49-60." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .