Badger is the common name for any animal of three subfamilies, which belong to the family Mustelidae: the same mammal family as the ferrets, the weasels, the otters, and several other types of carnivore. There are 9 species of badger, in three subfamilies: Melinae (the Eurasian badgers), Mellivorinae, (the Ratel or Honey Badger), and Taxidiinae (the American Badger).
Typical badgers are short-legged and heavy-set. The lower jaw is articulated to the upper, by means of a transverse condyle firmly locked into a long cavity of the cranium, so that dislocation of the jaw is all but impossible. This enables the badger to maintain its hold with the utmost tenacity.