144324 American Mink Mustela vison Length 45-65cm Unwelcome introduction to Britain from North America. An active predator of aquatic life; instrumental in demise of the Water Vole. Hunts in afternoon and after dark. Swims well and buoyantly. Adult has slender body and bushy tail. Fur is soft, silky and typically dark brown. Males is larger than female. Utters high-pitched calls when alarmed. Originated from fur farms (‘liberated’ animals and escapees) and now alarmingly widespread along waterways throughout. Often the subject of eradication programmes.