Facts about Wolves in Sweden

Wolves have recently returned to Scandinavia since they were claimed extinct in the 1960’s.

Today there are more than 340 Wolves in 46 different family groups. The exact official figures are changing each year, but this page will give you a good insight into the current status of the wolves in Sweden and the Swedish Wolf population.

Here we have collected facts about wolves in Sweden and Scandinavia.

 

Facts about wolves in Sweden. Photo: Glenn MattsingWolf in Sweden, photo: Glenn Mattsing

Scientific name

Canis lupus

 

How large is a wolf?

They reach up to 90 cm at shoulder. Males weigh 35 – 55 kg and females are on average 10 kg lighter. Scandinavian Grey Wolves are generally larger than wolves in Southern Europe although they are the same species.

 

How long do wolves live?

Wolves rarely become older than 12 years, but most wolves die at a young age, even during their first year. Only one out of ten wolves that are born are estimated to make it into adulthood and have it’s own litter.

 

Photo: Mats Bentmar

What do Scandinavian wolves look like?

One often say that the typical Scandinavian wolf is grey, but at a closer look the fur is actually more a mix of white, yellowish and black. The chin and throat are almost always white. Unlike many hunting and husky dogs that may look a bit like wolves, the Scandinavian wolves are never white above the eyes. They often have black markings on legs, in the face, along their back and a dot halfway down the tail. The winter fur is a lot thicker than the summer fur. The front paws are larger than the hind paws, basically because the front part of the body is heavier and therefore needs larger paws.

 

Do wolves live in packs?

Wolves are social animals. They live in family groups, sometimes called packs. A family group typically consist of two parents and their pups. Most of the pups disperse (leave) the family after twelve months, before becoming sexually mature. Some pups may stay for more than one year. These elder pups may act as baby sits and remain close to the pups of the younger generation.

 

Wolf territories map 2015

What is a wolf territory?

A Wolf couple keeps a distinct home territory where they typically stay for as long as they remain an intact couple. The territory is marked out accurately by urine, droppings, scratches and sound calls. They actively defend their territory against trespassing wolves. Fights between family members and trespassing wolves are not uncommon. Wolves may even get killed in such fights.

The size of a Wolf territory may vary considerably. In Scandinavia such sizes have been calculated with the help of snow tracking and GPS collaring. A normal home territory measures 800 – 1 000 square kilometers which equals more than 140,000 football/soccer pitches. In extreme cases the home territory can reach up to 2 000 square kilometers, but they can also be as small as 400 square kilometers. Access to food and surrounding territories are some of the factors determining the size of the territory.

 

Wolves in Sweden

Why do Wolves howl?

Wolves howl for many different reasons. They actually use many different type of calls to communicate within the family group. It can be short calls or longer series of howls, yipping, wining or even barking. Howls are also used to keep other wolves away from their territory. The most characteristic howls is probably when the pack is howling together.
>> Listen to our recordings of howling wolves here
>> If you want to hear wild wolves howl you can join a Wolf howling tour close to Stockholm

 

How many wolves are there in Sweden and Scandinavia?

Wolves in Sweden and Norway are members of a joint cross-boundary Scandinavian wolf population. In both countries, the wolf population is monitored by authorities, especially by tracking each winter.

During monitoring in winter 2016-2017, 46 family groups were documented in Scandinavia; 34 within Sweden, seven across the Norwegian-Swedish border, and five within Norway. 28 territorial pairs were confirmed; 19 within Sweden, three across the border and six within Norway.

A total of 43 wolf litters were confirmed in 2016. 32 in Sweden, 4 in Norway and 7 in crossborder wolf territories.

Based on the above figures on reproduction the Scandinavian wolf numbers were estimated to 430 (span 340-559), with the Swedish sub-population estimated to 340 (span 269-442). The smaller Norwegian population was counted directly in the field. A minimum of 25 cross-boundary wolves were counted, in addition to 65-68 individuals found only in Norway.

 

The return of the wolf to Sweden and Scandinavia

The Wolf was claimed to be extinct in Scandinavia in the 1960’s. In the early 1980’s three Wolves migrated from the Russian-Finnish population all the way to the county of Värmland in Southern Sweden close to the Norwegian border. These Wolves founded the new Wolf population and multiplied successfully into about 200 Wolves before some more Wolves arrived naturally from the Russian-Finnish population in 2008. Today most Wolves live in the Southern parts of Central Sweden.

 

Photo: HKuchera - Wolf

Wolf, photo: H Kuchera

Breeding

The mating season occurs by mid-February. During this period the couple spends most of their time at their own away from their pups. The pups are born 63 days after the mating. The pups are born at the end of April or beginning of May. A litter may consist of 1-10 pups. The pups weigh 400 grams at birth and in late autumn they have already grown to about 35 kg’s.

 

What is a wolf den?

During the first weeks after the pups are born they are kept inside or close to a den in which the pups have the chance to hide if danger occurs. This den can be a hole dug out in sand or just some rocks with cavities. They do not use the den during the rest of the year.

 

What does a wolf eat?

Wolves are carnivore and they prey on whatever is available and easiest to catch. In Central Sweden they mainly prey on Moose and Roedeer, but also Beavers, Hares, Badgers and Rodents. Further South they are more likely to prey on Roedeer, Red deer and Fallow deer. Certain individuals may occasionally take Sheep and Reindeer but these are often soon killed in protective hunting. The teeth are adapted to grip, drag, scratch and crush. The wolf can break bones of their prey to eat the marrow inside, they even break the thighbones of an adult moose. The wolf can survive in all types of habitat as long as there is enough food and they don’t get killed by man. Therefore they are often confined to live in forested areas where little or no humans are present. Wolves do not go in hibernation; they remain active the whole winter.

 

Which enemies do wolves have?

Most wolves are killed by humans, both during organized hunts and by poachers hunting wolves illegaly. Wolves are also killed by cars and trains. Some wolves are killed by other wolves in territorial fights.

 

Do all dogs come from wolves?

Yes, all dogs are descended from wolves. Dogs and wolves are actually the same species. The dog is just the domesticated form of the gray wolf.

In general, the domestic dog is an extremely close relative of the grey wolf, from which it differs by only ~0.04% in nuclear coding-DNA sequence, and no dog mitochondrial DNA sequences have been found that show closer kinship to other canid species.

 

 

More interesting facts about Wolves

  • Wolves are the largest members of the Canidae family, which includes domestic dog, dingo, coyote, African hunting dog, several kinds of jackals and several types of foxes.
  • A wolf pup’s eyes are blue at birth. Their eyes turn yellow by the time they are eight months old.
  • Wolves have an outstanding sense of smell with about 200 million scent cells compared with humans that have only about 5 million.
  • Wolves are good swimmers. At several occasions they have been seen swimming out to islands in lakes, and even across large rapid rivers during winter.
  • The wolf’s jaw force is sufficient to break open and crush bones with only a few bites. They are capable of a jaw pressure of up to 105 kilograms per square centimeter (1,500 pounds per square inch). This is about twice the jaw pressure of a German shepherd dog.
  • The jaws themselves are massive, bearing 42 teeth specialized for stabbing, shearing, and crunching bones. Their jaws also open farther than those of a dog.
  • Wolves constantly move around their territory and can easily cover 40-50 kilometers in a day.
  • Wolves howl to each other and to other Wolves, simply as a way of communication. Listen to our recordings of howling wolves here!
  • Nope, Wolves don’t howl more at full moon 🙂
  • Hearing a Wolf howl in a dark forest is a big experience, join Sweden’s most successful Wolf howling tours.
  • Wolves would not make good guard dogs because they are afraid of humans and would hide from visitors rather than bark at them.
  • Modern research shows that labeling a wolf “alpha” or “omega” is misleading because “alpha” wolves are simply parent wolves. Using “alpha” terminology falsely suggests a rigidly forced permanent social structure.
  • Dire wolves (canis dirus) were prehistoric wolves that lived about two million years ago. Now extinct, they hunted prey as large as woolly mammoths.
  • A wolf can run about 30 km (20 miles) per hour, and up to 60 km (40 miles) per hour when necessary, but only for a minute or two. They can trot around 8km (5 miles) per hour and can travel all day at this speed.
  • It is believed that the last wolf in England was killed in 1500. In 1770, Ireland’s last wolf was killed.
  • The Japanese word for wolf means “great god”.