A large goose, the Snow Goose occurs in a white or a dark morph. The white morph, the most common, is all white with black primaries. The dark morph, known as the Blue Goose, is extremely rare in the USA and has a dark gray body and white head. Both morphs have orange legs. Juveniles are gray overall with dark legs. The Snow Goose is similar in appearance to the smaller and far less common Ross’ Goose, but the Snow Goose has a ‘grin-patch’ (a dark patch on the side of the beak that makes it appear to be open or grinning) that the Ross’ Goose lacks. There are two subspecies of Snow Goose, the Greater and the Lesser Snow Geese, which vary in size.