Gander

A male goose. In the Greater White-fronted Goose, the male stand guard while the female incubates. In the Canada Goose, sometimes an adult male of a family flock starts local flights by vigorous up-and-down tossing of his head and a low guttural "talking"; at such times it is the female that leads the flight while the male (identified by his larger size) bringing up and guarding the rear, in spring migration.