The Old World least weasel, scientifically known as Mustela nivalis, is a small carnivorous mammal belonging to the Mustelidae family and found primarily in Europe, Asia, and Africa. It is commonly referred to as the least weasel due to its diminutive size, measuring around 7-8 inches in length, with a tail of about 2-3 inches. The Old World least weasel possesses a slender, elongated body with short limbs and a tapering face.
These weasels have a distinct fur coat that commonly consists of a rich brown color on the back and a creamy white underbelly. The fur's hue may change depending on the season in order to blend with the surroundings. Generally, males are slightly larger than females, and both genders possess a high metabolism and active hunting behavior. They are adept predators, feeding mainly on small mammals such as mice, voles, shrews, and sometimes birds or insects.
Old World least weasels are known for their exceptional ability to adapt to various habitats, from forests and grasslands to farmlands and even urban areas. They possess a stealthy and agile nature, enabling them to maneuver easily through dense vegetation and burrows. Their dens are usually found in abandoned burrows, hollow tree trunks, or rock crevices.
These tiny yet ferocious creatures are considered beneficial due to their role in controlling rodent populations. However, they may also pose a threat to domestic poultry or other small domesticated animals. Although least weasels are susceptible to predation by larger mammals, birds of prey, or snakes, they maintain a stable population and their conservation status is currently listed as of "least concern".
