Lewis Short
anser (noun M.f) : usu. m.Sanscr. hasas; Gr. χήν; Germ. Gans; Engl. Gander; Erse, goss = goose (f., Varr. R. R. 3, 10, 3; Col. 8, 14, 4; cf. Schneid. Gram. II. p. 7; Bentl. ad Hor. S. 2, 8, 88; Neue, Formenl. I. p. 612 sq.)
* A goose; sacred to Juno, and which preserved the Capitol in the Gallic war. Hence held in high honor by the Romans, Liv. 5, 47; Cic. Rosc. Am. 20; Plin. 10, 22, 26, § 81 al.—Anser Amyclaeus, the swan, into which Jupiter changed himself at Amycloe, Verg. Cir. 488.
Charlton T. Lewis, Charles Short, A Latin Dictionary