Weasels include the stoats, ferrets, and polecats, as well as the European mink. The smallest is the least weasel of North America, which weighs a maximum of 250g, though much smaller ones are known. Learn more about weasels in this well-constructed overview produced by the BBC. This resource includes a series of videos and images showcasing weasels, as well as information on their habitat, distribution, behaviors, and more.