The Shorttail Weasel belongs to the Mustelidae family and has several synonyms like the Ermine, Stoat, Bonaparte Weasel, and the Least Weasel. The Ermine is the term used for the white winter-coated Shorttail Weasel, while the Stoat describes the same animal with a brown or black coat. The Bonaparte Weasel is the subspecies found in North America, and the Least Weasel is the smallest of the mustelids. These small mammals are known for their agility, speed, and remarkable hunting skills. They have a slender body, short legs, and a long tail. The Shorttail Weasel is a fascinating species of animal that has many synonyms to describe its unique characteristics and physical appearance.