WEASEL (vessla), often referred to as the "weasel family", is name for several species that include: the least weasel (småvessla), polecat (vessla), stoats, ferret (iller), mink (mink) and more. They're small, active predators, with long and slender bodies & short legs, which enable them to follow their prey into burrows. They vary in length from 7–8.5in, not including their tail.