A weasel /ˈwiːzəl/ is a mammal belonging to the genus Mustela of the Mustelidae family. The genus includes the least weasels, polecats, stoats, ferrets, and minks.Template:What? Members of this genus are small, active predators, with long and slender bodies and short legs. The Mustelidae family (which also includes badgers, otters, and wolverines) is often referred to as the "weasel family".