American mink  (Mustela vison)

American mink, native to North America, were first introduced to fur farms in Britain in 1929; the first official record of escapees breeding in the wild was in 1957 (5). Following many accidental and deliberate releases, the species is now widespread and common throughout Britain and much of Europe (6). In Britain they are spreading in terms of range and numbers, extending into East Anglia and Yorkshire (6). However, in some areas of England the population is declining, this may be due to the return of the native otter (Lutra lutra) (6).

Lives in aquatic habitats, but can spend some time away from water and can even live near urban areas (6).