The Brant (called Brent Goose in Europe) is a small dark goose that occurs throughout much of the northern hemisphere. In contrast to other goose species, Brant are characterized by their extensive use of native coastal habitats outside the breeding season. Three to four subspecies are recognized (see Systematics), mainly on the basis of plumage characteristics. The two/three North American subspecies are further separated into four subpopulations based on genetics, location of breeding and wintering areas, and migration routes.