. . . . . . . "1990-11-01T00:00:00Z"^^ . . "Tadorna tadorna" . . "Hydrobia ulvae" . . "Meininger, P.L. and H. Snoek. 1992. Non-breeding Shelduck Tadorna tadorna in the southwest Netherlands: effects of habitat changes on distribution, numbers, moulting sites and food. Wildfowl 43:139-151." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .