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Quick Facts
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Mustelidae
Genus: Gulo
Species: gulo

Height: 13 - 17 inches
Length: 30 - 36 inches
Weight: 30 - 70 lbs
Gestation: 30 - 50 days
Offspring: 1 - 6
Life Span: 17 years
Top Speed (Ground): 30 mph

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Gulo gulo

Wolverines are one of the largest mustelids. They have brownish-black hair with strips of light brown along their sides. Their fur is long and dense and does not retain much water. This makes it very resistant to frost in the cold environment wolverines live in. They have large claws and pads on their feet that help them move over deep snow. Wolverines are shaped vaguely like a large marten and have a heavy build with a large head, small ears, a short tail, and very large, powerful limbs. Wolverines are very strong for their size and have been known to drive bears, cougars, and packs of wolves from their kills. They are generally known as the strongest mammal for their size.

The diet of a wolverine consists of anything from eggs, rodents and other small animals to full size deer and sheep. The wolverine can bring down preyWhat does prey mean? that is five times its size.

Wolverines are found in Northern Europe, Siberia, and northern North America. They live in forests, mountains, plains, and brushland.

Because wolverines are so strong, fast, and aggressive few predatorsWhat does predators mean? bother them. Hunters, wolf packs, and large bears are about all that threatens them.

Wolverines are mainly terrestrial though they are strong swimmers and excellent tree climbers. They usually travel at a fast lope with great endurance, sometimes traveling as much as 10 miles without a break. Wolverines are largely nocturnal but in areas of extended daylight or darkness will often switch to a cycle consisting of a 4-hour waking period followed by 4 hours of sleep. Wolverines are solitaryWhat does solitary mean?, aggressive animals and quite territorial. They do not allow members of the same sex in their territory. They mark their territory with scent glandsWhat does glands mean?. They often mark food caches with scent as well. Though solitary, among family members play has been observed. Wolverines have also been known to play with objects.

Female wolverines build snow densWhat does dens mean? in which they birth and nurse. Embryonic wolverines dormant for about 6 months before they start to develop. From that point, gestationWhat does gestation mean? takes about 30-50 days. Because of this delayed implantation, it is possible for members of the same litter to have different fathers. Young wolverines are born in January through April and nurse for 8 - 10 weeks. After birth, mother wolverines hide their young and defend them until they are old enough to be on their own. Intruders are not tolerated anywhere near the young wolverines. By autumn, they are on their own.

Wolverines have a keen sense of smell and hearing. Their eyesight is poor.

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