The least weasel (Mustela nivalis), or simply weasel in the UK, is the smallest member of the genus Mustela and of the family Mustelidae (as well as the smallest of the Carnivora), native to Eurasia, North America and North Africa, though it has been introduced to New Zealand, Australia, Malta, Crete, Bermuda, Madeira Island, Azores, Canary Islands, Sao Tome, the Falkland Islands, Argentina and Chile.