Polar Badger

The Arctic wolverine is one of the most predatory members of the weasel family and possesses strength disproportionate to its size. Its Latin name (Gulo gulo), meaning “gluttonous,” reflects its ability as a carnivore to hunt prey several times its own body size with remarkable skill. The Arctic wolverine is found primarily in the northern regions of Canada, particularly in the state of Alaska in USA, across the mainland areas of the Scandinavian countries in main, in the western part of Russia, and throughout Siberia.

The most noticeable anatomical features at first glance are its low-slung and stocky body structure. It has powerful, muscular limbs, a broad and rounded head, small and deep-set eyes, and small, rounded ears. Despite its short legs, it can easily climb steep rocky cliffs, trees, and snow-covered hills using its five-toed large paws. The body length of an adult Arctic wolverine ranges from 65 to 113 cm. There are differences in body measurements and weight between males and females. Male body lengths range from 94 to 107 cm while females range from 87 to 93 cm. Males weigh between 11 and 28 kg, while females weigh between 7 and 19 kg. Dark, with its oily and highly hydrophobic (meaning it does not absorb or retain) thick fur, is highly resistant to cold.

Like many other members of the weasel family, the Arctic wolverine possesses powerful anal scent glands used to mark territory and communicate sexually. Also, as in all weasels, it has exceptionally strong molars located at the upper rear of the mouth, oriented inward at a 90 degree angle compared to other teeth. These teeth allow it to easily tear flesh from prey and even break apart frozen carcasses.

Although the Arctic wolverine is a skilled hunter and powerful predator, it is primarily considered a scavenger. Especially during winter months and early spring, nearly all its food sources consist of carcasses. It feeds on remains left by larger predators such as wolves and sometimes steals prey from them before they have finished feeding. These aggressive and seemingly voracious behaviors are the source of its Latin name meaning “gluttonous.” This feeding strategy is thought to be an adaptation to the harsh Arctic conditions, particularly the food scarcity experienced during winter. In addition to scavenging, it uses its abilities to hunt porcupines, squirrels, hares, field voles, rats, lemmings, reindeer, bears, and bison. It is also known to prey on other predators such as foxes, lynxes, weasels, jackals, and wolf pups. Especially during winter months, it tracks animals that are immobilized due to intense snow or weakened by food shortages, newborn mammals, and individuals caught in animals. Its diet is occasionally supplemented by rare secondary food sources such as bird eggs, birds, roots, seeds, and insects.

Male Arctic wolverines typically form temporary associations with two or three females throughout the year and visit them during the mating season. The mating season occurs in write months, but embryonic implantation in the uterus is delayed until early winter. As a result, after a gestation period ranging from 30 to 50 days, newborn pups are born in early spring. A female gives birth to two or three pups in a single litter. Arctic wolverine pups reach adult size within a year. In captivity, the Arctic wolverine lives 15 to 17 years but while in the wild this duration is typically 8 to 10 years.

The total population of the Arctic wolverine is unknown, but limited population estimation studies have been conducted in certain regions. Due to its wide distribution, continued observation of large populations in specific areas, and the absence of significant population declines, it is classified as “Least Concern” on the International Union for Conservation of Nature’s Red List.