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Wildlife Guide · North America & Europe

Grey Wolf

Canis lupus

The original wolf, ancestor of every dog, persecuted to the brink and slowly clawing its way back.

Least Concern globally (locally Endangered or extirpated in many regions)
A grey wolf (Canis lupus) standing alert in snowy northern woodland, its thick grizzled coat and amber eyes catching the winter light.

Image: Source: Wikimedia Commons via Wikipedia “Wolf” — verify license before production

In brief

The grey wolf (Canis lupus) is the largest wild dog and the ancestor of the domestic dog; it is listed as Least Concern globally with an estimated 200,000–250,000 in the wild, but remains locally endangered or extinct across much of its former range.

By the WARN Research & Conservation TeamChecked against IUCN Red List & CITES sourcesLast updated

The grey wolf (Canis lupus), also called the timber wolf, is the largest wild member of the dog family and the wild ancestor of the domestic dog. Once the most widely distributed land mammal on Earth, it ranged across most of North America, Europe and Asia before centuries of trapping, poisoning and bounty hunting wiped it out from large parts of its former territory. Today the species survives across a still-vast but fragmented range, living in tight family groups called packs and surviving as a cooperative hunter of deer, elk, moose and smaller prey. Globally the grey wolf is listed as Least Concern by the IUCN, yet that headline hides a more complicated truth: in many individual countries and regions it remains endangered, reintroduced, or absent entirely. Its story is one of both relentless persecution and one of conservation's most striking recoveries.

200,000–250,000

Wolves estimated in the wild worldwide

Least Concern

Global IUCN Red List status (assessed 2023)

Up to ~13

Typical wolves in a pack, usually one family

Stable

Overall global population trend

Figures sourced from IUCN Red List: Canis lupus (Grey Wolf), assessed 2023, CITES: Wolf species listing, Wikipedia: Wolf and other references on this page.

Grey Wolf: Quick Facts

Vital statistics and key facts about the Grey Wolf
Lifespan About 6–8 years in the wild; can reach 13+ in captivity
Weight Roughly 30–50 kg (66–110 lb); large northern males larger
Size Body 1.0–1.6 m (3.3–5.2 ft); 60–90 cm at the shoulder
Diet Carnivore: deer, elk, moose, smaller mammals, carrion
Gestation About 62–63 days
Young Usually 4–6 pups per litter, once a year
Baby name Pup (or whelp)
Group name A pack
Top speed Around 50–60 km/h (31–37 mph) in short bursts
CITES Appendix II (Appendix I for Bhutan, India, Nepal and Pakistan populations)

Scientific Classification

Scientific classification of the Grey Wolf
Kingdom Animalia
Phylum Chordata
Class Mammalia
Order Carnivora
Family Canidae
Genus Canis
Species Canis lupus

Conservation Status

IUCN Status
Least Concern
Population
Approximately 200,000–250,000 mature individuals worldwide
Trend
Stable
Assessed
2023
CITES
Appendix II, with the Bhutan, India, Nepal and Pakistan populations listed in Appendix I

The global Least Concern listing masks wide local variation: wolves remain endangered, reintroduced, or extirpated in many individual countries and regions.

Did you know?

A single wolf howl can carry up to 10 km (6 miles) across open terrain, and packs use howling not just to regroup but to warn rival packs to keep their distance.

Key Facts: Grey Wolf

  • The grey wolf is the wild ancestor of the domestic dog, and the two remain so closely related they can still interbreed.
  • Wolves live in packs that are essentially families: a breeding pair and their offspring of one or more years, not a hierarchy of unrelated rivals.
  • Globally the species is Least Concern with an estimated 200,000–250,000 individuals, but many regional populations are endangered, reintroduced, or locally extinct.
  • Centuries of bounty hunting, poisoning and habitat loss erased wolves from much of Western Europe and the contiguous United States by the early 20th century.
  • Legal protection and reintroductions, such as the 1995 return to Yellowstone, have allowed wolves to recolonise parts of their old range.
  • Conflict with livestock farming remains the central challenge, making coexistence tools and habitat protection essential to lasting recovery.

Pack life and behaviour

A wolf pack is best understood as a family unit. In most cases it centres on a single breeding pair and their pups from the current and previous years, which together can number anywhere from a handful of animals to a dozen or more. The outdated idea of a constantly fighting 'alpha' jostling for dominance came from studies of unrelated captive wolves; in the wild, the breeding adults are simply the parents. Packs hold and defend a territory that can span hundreds of square kilometres, communicating through howls that carry for miles, along with scent marking and body language. Cooperative hunting lets wolves bring down prey far larger than themselves, including elk, moose and bison, though they also take smaller animals and scavenge. Young wolves often disperse at one to two years old to find mates and territory of their own, which is how the species naturally recolonises new ground.

Persecution and recovery

Few animals have been hunted with the intensity directed at the wolf. For centuries it was treated as vermin, with governments paying bounties for dead wolves and campaigns of trapping, shooting and poisoning steadily eliminating it from country after country. By the early 1900s the grey wolf had been wiped out across most of Western Europe and almost the entire contiguous United States. The turnaround came with changing attitudes and legal protection in the second half of the 20th century. Protected status, public support and deliberate reintroductions, most famously the release of wolves into Yellowstone National Park in 1995, allowed populations to rebound and disperse. Wolves have since returned naturally to countries such as France, Germany and Denmark, expanding from surviving strongholds in eastern and southern Europe.

Conservation status and ongoing threats

On a global scale the grey wolf is classified as Least Concern, reflecting its wide distribution and a worldwide population estimated at roughly 200,000 to 250,000 animals with a broadly stable trend. That status, however, applies to the species as a whole, not to every population. In many individual countries and regions wolves remain rare, endangered, or entirely absent, and recovering populations are often small and isolated. The dominant threat is conflict with livestock farmers, which drives both legal culling and illegal killing. Habitat fragmentation, road mortality, reduced wild prey and shifting legal protections all add pressure. Sustaining the wolf's recovery depends on protecting connected wild habitat and on practical coexistence measures, from livestock guarding to compensation schemes, that lower the cost of living alongside a large predator.

Grey wolf vs domestic dog vs coyote

TraitGrey WolfDomestic DogCoyote
Scientific nameCanis lupusCanis lupus familiarisCanis latrans
Typical weight30–50 kgVaries widely by breed7–20 kg
Social structureFamily packBonded to humansPairs or small groups
Primary rangeN. America, Europe, AsiaWorldwide with peopleNorth & Central America
IUCN statusLeast ConcernDomesticatedLeast Concern
RelationshipWild ancestorDescended from wolfClose wild relative

What WARN Does

This guide is part of the World Animal Rescue Network's free educational and awareness work, written to give clear, accurate, science-based answers about one of the world's most-searched animals. We want to be straightforward about scope: the grey wolf lives across North America, Europe and Asia, outside the countries where WARN currently funds frontline projects at this launch stage. WARN does not run or fund wolf recovery programmes, and we will not claim otherwise. What we do here is help people understand wolves, the persecution they have faced, and what genuine recovery requires, as part of our broader mission to reduce human-wildlife conflict and protect wild habitat everywhere. If and when our funded work expands, we will say so plainly.

Wolves need wild, connected land to roam, hunt and raise their pups, and so do countless other species. While WARN does not yet fund wolf programmes directly, your gift to our habitat protection work defends the kind of wild spaces large predators depend on and supports our wider mission to reduce human-wildlife conflict.

Support Habitat Protection Donate to WARN

How does the grey wolf compare?

Wolf vs Coyote →Dog vs Wolf →

Grey Wolf: Frequently Asked Questions

Are grey wolves endangered?
Globally, no. The grey wolf is listed as Least Concern by the IUCN, with an estimated 200,000–250,000 in the wild and a stable overall trend. But this is a global picture: in many individual countries and regions wolves are endangered, recently reintroduced, or locally extinct, so 'endangered' can be accurate at a local level even though the species as a whole is not.

Is a grey wolf the same as a dog?
Not the same, but extremely close. The domestic dog descends from the grey wolf and shares almost all of its DNA. Dogs are usually classified as a subspecies or variety of Canis lupus, and the two can still interbreed and produce fertile offspring. Thousands of years of domestication have made dogs behaviourally and physically distinct, but the wolf is genuinely the ancestor of every dog breed.

How big is a grey wolf?
Grey wolves typically weigh around 30–50 kg (66–110 lb), with large northern males occasionally exceeding that. They stand roughly 60–90 cm (24–35 in) at the shoulder and measure about 1.0–1.6 m (3.3–5.2 ft) in body length, plus a bushy tail. Size varies widely across the range, with the largest wolves living in the far north.

Do wolves really have an 'alpha' leader?
Not in the way the popular myth suggests. The 'alpha' concept came from captive wolves forced together as strangers. In the wild, a pack is a family, and the so-called alphas are simply the breeding parents leading their own offspring. There is no constant fighting for dominance among unrelated rivals.

What do grey wolves eat?
Wolves are carnivores that specialise in hunting large hoofed mammals such as deer, elk, moose and bison, working together to bring down prey much bigger than an individual wolf. They also take smaller animals like beavers and hares, and will scavenge carcasses when the chance arises. Their diet shifts with whatever prey is locally available.

How fast can a grey wolf run?
Grey wolves can sprint at around 50–60 km/h (about 31–37 mph) in short bursts when chasing prey. More important to their success is endurance: wolves can trot for many hours and cover long distances each day across their territory, wearing down prey rather than relying on a single fast dash.

Where do grey wolfs live?
Grey Wolfs live in North America, Europe, Asia. The grey wolf (Canis lupus) is the largest wild dog and the ancestor of the domestic dog; it is listed as Least Concern globally with an estimated 200,000–250,000 in the wild, but remains locally endangered or extinct across much of its former range.

Are grey wolfs dangerous?
Once the most widely distributed land mammal on Earth, it ranged across most of North America, Europe and Asia before centuries of trapping, poisoning and bounty hunting wiped it out from large parts of its former territory. Handle gently and with normal pet or farm care.

How long do grey wolfs live?
Grey Wolfs typically live About 6–8 years in the wild; can reach 13+ in captivity. The grey wolf (Canis lupus) is the largest wild dog and the ancestor of the domestic dog; it is listed as Least Concern globally with an estimated 200,000–250,000 in the wild, but remains locally endangered or extinct across much of its former range. Wild and captive figures can differ; use the sources listed on the guide for the underlying studies.

Sources & References

Population figures, conservation status and biological facts on this page are drawn from authoritative scientific and intergovernmental sources.

Terms used on this page

Plain-English definitions, from our wildlife and conservation glossary.

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