Goose is a popular name for the Anscrinoe sub-family of water birds of the family Anatidae in which the beak is roughly conical in shape. Geese differ from ducks in the plumage of both sexes is generally similar, and they often form a strong and lasting pair bond. The male goose (a gander) assists in the nesting and the raring of the young, vigorously defending his mate and the nest. A group of geese on the ground is known as a gaggle, and a group in flight as a skein. Research Goose