The black geese of the genus Branta are waterfowl belonging to the true geese and swans.
The black geese have prominent areas of black coloration. They can be distinguished from all other true geese by their legs and feet, which are black or very dark grey. Furthermore, they have black bills and large areas of black on the head and neck, with white (ochre in one species) markings that can be used to tell apart most species. As with most geese, their undertail and uppertail coverts are white.