The wolverine or glutton (Gulo gulo) is the largest member of the Mustelidae family (the weasels). It is a stocky and muscular carnivore, more like a small bear than other mustelids. The wolverine, a solitary animal, has a reputation for ferocity, and can kill prey many times larger than itself. It is a powerful and versatile predator and scavenger.
There is a clear difference between two subspecies: the Old World form Gulo gulo gulo and the New World form G. g. luscus.