. . . . . . . "1961-01-01T00:00:00Z"^^ . . "Tadorna tadorna" . . "Littorina" . . "Buxton, N.E. and C.M. Young. 1981. The food of the Shelduck in north-east Scotland. Bird Study 28:41-48." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .