The least weasel, scientifically known as Mustela nivalis, is the smallest member of the weasel family. It typically measures about 6 to 12 inches in length, including its tail, and weighs around 1 to 3 ounces. This small carnivore is found across North America, Europe, and Asia, thriving in various habitats such as forests, grasslands, and farmlands. Least weasels have a slender body, short legs, and a pointed snout. Their fur is brown in summer and turns white in winter in colder regions, providing camouflage. They primarily feed on small mammals, birds, and insects, showcasing their agility and hunting skills.