# Wolf — Facts, Threats & Conservation

*Canis lupus (Linnaeus, 1758) and related subspecies*

> The grey wolf (Canis lupus) is a Least Concern pack-hunting canid of the Northern Hemisphere and wild ancestor of dogs — regionally extirpated in much of Europe and North America but recovering where reintroduced.

**IUCN status:** Least Concern globally (IUCN); regional populations vary  ·  **WARN range:** North America, Europe, Asia, historically worldwide except tropics

## Quick facts
| Fact | Value |
| --- | --- |
| Species | Canis lupus (grey wolf) |
| Related guides | Grey wolf, maned wolf |
| Social unit | Pack — breeding pair + offspring |
| Diet | Large ungulates, beavers, smaller prey |
| Domestic relative | Dog (Canis familiaris) |
| CITES | Appendix II |

## Scientific classification
- **Kingdom:** Animalia
- **Class:** Mammalia
- **Order:** Carnivora
- **Family:** Canidae
- **Species:** Canis lupus

## Conservation status
- **Status:** Least Concern globally; regional populations Endangered or recovering.
- **Population:** Roughly 300,000 wolves worldwide
- **Trend:** Increasing in parts of Europe and North America; decreasing where persecuted
- **Assessed:** 2021
- **CITES:** Appendix II

## Key facts: Wolf
- Grey wolves are the wild ancestor of all domestic dogs.
- Packs are family groups — usually a breeding pair and offspring.
- Wolves were eradicated from much of western Europe and the US before partial recovery.
- Yellowstone wolf reintroduction restored ecosystem balance via trophic cascade.
- WARN guides cover grey wolf and maned wolf separately.
- Conflict with livestock drives ongoing persecution despite legal protection in many countries.

## What is a wolf — and how is it different from a dog?
Grey wolves (Canis lupus) are wild canids — larger, longer-legged and narrower-chested than most dogs, with straight tails and upright ears. Genetic studies show dogs diverged from wolves roughly 20,000 to 40,000 years ago through domestication. Wolves retain fear of humans and vast territory requirements — hundreds of square kilometres per pack in some regions.

Subspecies and local names abound: timber wolf, tundra wolf, Arabian wolf, Mexican wolf. The maned wolf of South America is a separate species (Chrysocyon brachyurus) covered in WARN's dedicated maned wolf guide — not a true wolf despite the name.

Distinguishing wolf from coyote, jackal or large dog requires expert assessment — misidentification drives unnecessary killing.

## Pack life and hunting
Wolf packs are typically extended families: a dominant breeding pair and their offspring from several years. Packs hunt cooperatively, testing weak elk or deer through endurance chases. Single wolves can kill moose or bison in deep snow. Howling maintains contact across territory and may reduce conflict between neighbouring packs.

Pups are born in dens in spring; the pack feeds lactating mothers and later regurgitates meat for pups. Dispersing young adults seek new territory and mates — critical for genetic exchange between populations.

Where wolves were removed, deer and elk overbrowsing damaged riparian vegetation until reintroduction restored balance — the classic Yellowstone trophic cascade.

## Persecution, recovery and conflict
Centuries of bounties, poisoning and habitat loss eliminated wolves from Britain, Japan and most of western Europe and the contiguous United States. Legal protection under the US Endangered Species Act and EU Habitats Directive enabled recovery in parts of Spain, Italy, Scandinavia and the Rocky Mountains.

Livestock depredation remains the main conflict. Non-lethal tools — fladry, guard dogs, range riders, compensation schemes — reduce losses more sustainably than indiscriminate culling. Illegal poisoning still kills wolves and scavenging raptors.

Hunting seasons resume in some US states when populations exceed targets — a politically charged management debate.

## Wolves and people
Wolves loom large in folklore — from Little Red Riding Hood to the she-wolf of Rome. Today they divide opinion between rewilding advocates and ranchers. Science supports coexistence where governance is fair and non-lethal tools are funded.

Read WARN's grey wolf guide for North American detail and maned wolf guide for South America's fox-like canid. This hub orients searchers who query 'wolf' before choosing a specific page.

## Related WARN canid guides
This page is the wolf hub. WARN's grey wolf guide covers Canis lupus in North America and Eurasia in detail. The maned wolf guide covers South America's long-legged savanna specialist — unrelated to true wolves despite the common name.

Fox, jackal and domestic dog guides address other canids. Together they map the dog family for readers researching wild relatives of household pets.

## What WARN does
WARN does not run wolf field programmes but publishes free education on apex predators and ecosystem health — principles that apply to habitat work in Brazil, Colombia and beyond.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Wolf
### Are wolves endangered?
Globally Least Concern with roughly 300,000 wolves. Regional populations were extirpated and remain Endangered — Mexican wolf, red wolf — or recovering under protection.

### What is the difference between a wolf and a dog?
Wolves are wild Canis lupus — dogs are domestic descendants. Wolves fear humans, need vast territories and cannot be tamed like dogs.

### Do wolves attack people?
Wild wolf attacks on humans are extremely rare. Healthy wolves avoid people. Most incidents involve rabid animals or habituated wolves fed by humans.

### What is a wolf pack?
Usually a family — breeding pair and offspring — not a hierarchy of alphas fighting for dominance. Cooperation defines pack hunting and pup-rearing.

### Is the maned wolf a real wolf?
No. The maned wolf is a separate South American canid. See WARN's maned wolf guide.

### Where were wolves reintroduced?
Yellowstone National Park (1995) is the famous US example. Wolves also recolonised naturally in parts of Europe — France, Germany, Scandinavia.

## Sources
- [IUCN Red List — Canis lupus](https://www.iucnredlist.org/)
- [International Wolf Center](https://wolf.org/)
- [Yellowstone National Park — wolves](https://www.nps.gov/yell/learn/nature/wolf-restoration.htm)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/wolf