They are colored in blacks, whites, greys, and browns. The sexes are very similar in appearance.
True geese are mainly terrestrial in their feeding habits and have strong bills adapted for grazing.
They tend to mate for life and both sexes care for the goslings. In reality when all of the Branta geese are assembled they are better described as having bolder patterned black or brown with white plumage than those geese classified as Anser species. The bills and legs of all of the Branta species are black. More information can be found from the sources in the reference list at the bottom of this web page. Ducks, Geese, and Swans of North America .