How Long Do Wolves Live? Wolf Lifespan in the Wild

How long do wolves live in the wild?

A wild gray wolf that survives its first year usually lives a few more years, with the average age at death around five to six. That average hides a huge range: some wolves die as pups, others are killed as young adults while searching for a territory, and a small number live into their teens.

Life expectancy depends heavily on where a wolf lives. In large protected areas such as Yellowstone National Park, wolves are not hunted, but they face frequent fights with neighboring packs. Outside parks, many wolves are shot legally or illegally, hit by vehicles or removed after killing livestock, and wolves in heavily hunted populations tend to die younger.

How long do wolves live in captivity?

Wolves in zoos, wildlife parks and sanctuaries often live 12 years or more, and some pass 15. They get regular food, shelter and veterinary care, and they never have to chase a moose that can kick hard enough to break a jaw or ribs. The difference between captive and wild lifespans shows how dangerous a wolf’s natural life is, rather than any limit set by its body.

What kills wild wolves?

Wolves have few natural predators, so most die from other causes:

• Other wolves. Packs defend their territories fiercely, and fights between packs are among the main natural causes of death. Studies in Minnesota and Denali National Park in Alaska found that between 14% and 65% of wolf deaths, depending on the study, were caused by other wolves.
• People. Outside protected areas, humans are often the leading cause of death through legal hunting and trapping, poaching, traffic and the removal of wolves that prey on livestock. In Scandinavia, a 2012 study estimated that poaching alone accounted for about half of all wolf deaths over roughly a decade, and that most of it was never detected.
• Disease and parasites. Sarcoptic mange, canine distemper, canine parvovirus and, in some regions, rabies can kill wolves, especially young or weak ones.
• Prey and hunger. Hunting large animals is risky. Wolves are injured or killed by the hooves and antlers of moose, elk and bison, and an injured or elderly wolf that cannot hunt may starve.

Why do so many wolf pups die?

The first year is the most dangerous time in a wolf’s life. A litter usually has four to seven pups, born blind and deaf and weighing only about 300–500 g (11–18 oz). Whether they survive depends on how much food the pack can bring back, how many adults help raise them, and whether disease strikes.

Survival varies enormously from year to year. In good years most pups in a pack may live to autumn, while in bad years disease outbreaks or a shortage of prey can wipe out most of a litter. Canine parvovirus and distemper are especially deadly to pups, and in some years, such as 2005 in Yellowstone National Park, a distemper outbreak killed a large share of the year’s young. Pups can also be killed by bears or by wolves from rival packs.

Danger rises again when young wolves leave home, usually between one and three years old. Traveling alone through unfamiliar country, they cross roads, enter the territories of hostile packs and come close to farms and people.

The oldest known wolves

Because many wolves are fitted with radio collars as pups or young adults, biologists know the exact ages of some wild wolves. In the northern Rocky Mountains, collared wolves have been documented at about 13 to almost 14 years old, which appears to be near the upper limit for wild wolves.

In Yellowstone, the oldest wolves known to biologists have reached about 12 or 13 years. A female known as 1090F was close to 12 in early 2026, making her the oldest wolf alive in the park at the time. Another famous female, 907F of the Junction Butte pack, raised many litters before she was killed by a rival pack at about 11 years old. Such long lives are the exception: only a small fraction of the wolves born in the park reach ten years.

How do biologists tell a wolf’s age?

Pups and yearlings are easy to recognize by their size, body shape and behavior. For adults, biologists look at tooth wear: the teeth of older wolves are blunt, worn or broken. Older wolves also tend to have more white hairs on the muzzle, forehead and tip of the tail.

For wolves found dead, scientists can count growth layers in the cementum of a tooth root, much like the rings of a tree. Radio-collaring wolves when they are young gives the most precise ages of all, which is why long-term projects such as those in Yellowstone and Minnesota provide most of the reliable longevity records.

Wolf lifespan compared with other animals

Wolves live a similar length of time to their smaller cousin, the coyote, which has been recorded living up to about 10 years in the wild and 18 years in captivity. To compare the two species in more detail, see wolf vs coyote. Long-lived reptiles are in a different league: find out how long alligators live.

Despite their short lives, wolves reproduce quickly, so a population can recover fast once killing is reduced. That is why wolf numbers have grown so quickly in parts of Europe and the United States since legal protection began, and why rare attacks on people get so much attention when wolves return; see are wolves dangerous?