The union between Tyndareus's wife and one of these creatures may have produced Castor, Pollux, or Helen.
Two ancestors of these animals drink from the Well of Urd. One of these creatures appeared after Achilles strangled an invincible Trojan on his first day at Troy. They circle a shrine in the Eridanos river in Hyperborea. Phaethon's best friend bore the Greek name of this creature and became one in grief. In a common Germanic folktale, their namesake "maidens" have magical (*) robes which get stolen by men as they bathe. Brahma's consort Saraswati has one of these creatures as a mount. The union between Tyndareus's wife and one of these creatures may have produced Castor, Pollux, or Helen. For 10 points, name this bird, in whose shape Zeus seduced Leda.
Two ancestors of these animals drink from the Well of Urd. One of these creatures appeared after Achilles strangled an invincible Trojan on his first day at Troy.
swans