Skip to main content

Wildlife Guide · Tibet & China

Yak

Bos mutus (Przewalski, 1883)

The shaggy giant of the Himalayas — wild herds on the roof of the world.

IUCN: Vulnerable
A black domestic yak (Bos grunniens) stands in profile on short green grass, showing its characteristic long shaggy coat, curved horns, and stocky build — no decorations or enclosures present.

Image: Photo: Garst, Warren, 1922-2016, photographer / Wikimedia Commons (CC BY-SA 4.0)

In brief

The wild yak (Bos mutus) is a Vulnerable high-altitude bovid of the Tibetan Plateau and Himalayas — ancestor of the domestic yak, threatened by hunting, hybridisation and habitat disturbance; remnant populations persist in Pakistan and Nepal.

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

The wild yak is a massive bovid of the high-altitude Tibetan Plateau and Himalayan ranges, adapted to life above 3,000 m where oxygen is thin and winters are brutal. Bos mutus is the ancestor of the domestic yak, which supports herding communities across Tibet, Nepal, Pakistan and Mongolia. Wild yaks weigh up to 1,000 kg with long shaggy black hair, curved horns and a humped shoulder profile. Listed as Vulnerable by the IUCN, wild yak populations have declined from hunting, hybridisation with domestic yaks and habitat disturbance. Pakistan's northern highlands hold remnant wild yak populations in the shadow of the Himalayas.

Vulnerable

IUCN Red List status (2016 assessment)

~10,000

Estimated wild yak population

1,000 kg

Maximum weight — large males

Appendix I

CITES listing — commercial trade banned

Figures sourced from IUCN Red List — Bos mutus, Encyclopaedia Britannica — yak, Wildlife Conservation Society — Tibetan Plateau .

Yak: Quick Facts

Vital statistics and key facts about the Yak
Weight 500–1,000 kg (males larger)
Altitude Above 3,000 m on Tibetan Plateau and Himalayas
Domestic ancestor Domestic yak descended from wild yak
Population Roughly 7,000–10,000 mature wild individuals
Threat Hunting and hybridisation with domestic yaks
CITES Appendix I

Scientific Classification

Scientific classification of the Yak
Kingdom Animalia
Phylum Chordata
Class Mammalia
Order Artiodactyla
Family Bovidae
Genus Bos
Species Bos mutus (Przewalski, 1883)

Conservation Status

IUCN Status
Vulnerable (IUCN, 2016). Roughly 7,000–10,000 mature individuals.
Population
Roughly 7,000–10,000 mature individuals on Tibetan Plateau and Himalayas
Trend
Decreasing
Assessed
2016
CITES
Appendix I

Hybridisation with domestic yaks threatens the wild gene pool.

Key Facts: Yak

  • Wild yaks are the ancestor of domestic yaks supporting Himalayan herding communities.
  • They survive at altitudes above 3,000 m where oxygen levels are roughly 60% of sea level.
  • Wild yak populations have declined from hunting and hybridisation with domestic yaks.
  • Pakistan's northern highlands hold remnant wild yak populations near the Himalayas.
  • Wild yaks can weigh up to 1,000 kg with long shaggy hair insulating against -40°C winters.
  • Domestic yaks outnumber wild yaks by millions — wild gene pool conservation is critical.

Life on the Tibetan Plateau

Wild yaks belong to the genus Bos alongside cattle, bison and gaur. Bos mutus is the largest native mammal of the Tibetan Plateau — adults weigh 500–1,000 kg with males substantially larger than females. Long shaggy black hair covers the body; a dense woolly undercoat insulates against temperatures below -40°C. Curved horns span up to 1 m in males. Wild yaks inhabit alpine meadows, steppe and desert steppe above 3,000 m on the Tibetan Plateau and in the western Himalayas of India, Nepal and Pakistan. They descend to lower elevations in winter. Physiological adaptations include large lungs, efficient oxygen utilisation and a compact body that minimises heat loss. Domestic yaks (Bos grunniens or Bos mutus grunniens — taxonomy debated) were domesticated from wild yaks at least 4,000 years ago. Millions of domestic yaks support pastoralist economies across Tibet, Nepal, Ladakh, Pakistan's Gilgit-Baltistan and Mongolia.

Herds, behaviour and ecology

Wild yaks form herds of females and young led by mature females. Males are solitary or form bachelor groups, joining female herds during the breeding season. Herds graze grasses, sedges and herbs on alpine meadows, migrating seasonally between summer high pastures and winter valleys. Wild yaks are strong swimmers and can cross rivers when migrating. They use horns and bulk in defence against wolves and snow leopards — predators that also threaten domestic yak herds in Pakistan and Nepal. Calves are born in spring when grass growth resumes after winter. Wild yaks play an ecological role as large grazers shaping alpine vegetation. Their dung fertilises meadows and supports invertebrate communities. Where wild yaks have declined, domestic yaks and livestock have altered grazing pressure on fragile alpine ecosystems.

Decline, hunting and hybridisation

Wild yak populations collapsed in the twentieth century from commercial hunting for meat and hides. The Tibetan Plateau held an estimated one million wild yaks in 1950; by the 1990s fewer than 15,000 remained. China's Chang Tang Nature Reserve — roughly 300,000 km² — anchors the largest remaining population. Hybridisation with domestic yaks is a critical threat. Domestic males mate with wild females, diluting the wild gene pool. As pastoralism expands across the plateau, contact between wild and domestic herds increases. Conservation programmes promote separation and genetic monitoring. In Pakistan's Gilgit-Baltistan and neighbouring Himalayan regions, remnant wild yak populations persist at the western edge of the range. Northern Pakistan's high-altitude communities depend on domestic yaks for transport, milk and fibre — the same landscapes where snow leopards and wild yaks overlap, connecting to WARN's regional coexistence education.

Conservation and recovery efforts

The IUCN lists wild yak as Vulnerable with an estimated 7,000–10,000 mature individuals and a decreasing population trend. China protects wild yaks in Chang Tang, Kekexili and Sanjiangyuan reserves. Anti-poaching patrols and firearms confiscation have reduced hunting pressure. CITES Appendix I bans commercial international trade. Conservation genetics programmes track hybridisation rates and maintain pure wild yak bloodlines in captive facilities. Community engagement with Tibetan pastoralists promotes separation of domestic and wild herds. Nepal and India protect wild yaks in border regions with China. Pakistan's northern conservation landscape — snow leopards, Marco Polo sheep and wild yaks — depends on maintaining low-disturbance high-altitude habitat. Infrastructure development and mining threaten the fragile alpine ecosystems wild yaks require.

What WARN Does

WARN supports coexistence education in Pakistan's northern highlands where wild yaks, snow leopards and herding communities share fragile alpine habitat. This yak guide is free public education about a Vulnerable high-altitude giant.

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.

Support Habitat Protection Donate to WARN

How does the yak compare?

Yak vs Bison →

How can I help save the yak?

There are three practical things that make a real difference for the yak — and the first is the one that funds everything else.

1

Fund frontline rescue

Back the partner-led teams, veterinary care and protection that reach yaks where the need is greatest — WARN channels donations straight to that work.

2

Ease the pressures

Avoid the wildlife trade and souvenirs, never buy wild animals as pets, and choose sustainable, habitat-friendly products — the threats behind the yak's decline fall when demand does.

3

Spread the word

Share accurate, sourced information about the yak. Wider awareness is what turns concern into lasting protection.

Support Habitat Protection Donate monthly

Yak: Frequently Asked Questions

How can I help save the yak?
The most effective way to help the yak is to fund the frontline rescue and habitat protection that keeps the species alive — WARN channels donations to partner-led teams working where the need is greatest. You can also ease the pressures behind its decline by avoiding the wildlife trade and souvenirs, never buying wild animals as pets, and choosing sustainable products, and by sharing accurate information to build wider support. See the ways to help below, or support WARN's Support Habitat Protection.

What is the difference between wild and domestic yak?
Wild yaks (Bos mutus) are larger, entirely black and never domesticated. Domestic yaks descend from wild yaks domesticated at least 4,000 years ago. They can interbreed, threatening wild gene pools through hybridisation.

Where do wild yaks live?
Wild yaks inhabit the Tibetan Plateau and western Himalayas above 3,000 m in China, India, Nepal, Pakistan and Mongolia. China's Chang Tang reserve holds the largest population.

Are yaks endangered?
Wild yaks are Vulnerable with roughly 7,000–10,000 mature individuals and a decreasing trend. Domestic yaks number in the millions and are not threatened.

How do yaks survive extreme cold?
Wild yaks have long shaggy outer hair and a dense woolly undercoat insulating against temperatures below -40°C. Compact bodies minimise heat loss. Large lungs extract oxygen efficiently at high altitude.

Do wild yaks live in Pakistan?
Remnant wild yak populations persist at the western edge of the range in Pakistan's northern highlands, including Gilgit-Baltistan, near the Himalayan border with China.

What do yaks eat?
The wild yak (Bos mutus) is a Vulnerable high-altitude bovid of the Tibetan Plateau and Himalayas — ancestor of the domestic yak, threatened by hunting, hybridisation and habitat disturbance; remnant populations persist in Pakistan and Nepal. The guide's ecology sections give the prey or forage detail behind that summary.

Are yaks dangerous?
Yaks are domesticated animals and are not dangerous to people in the wild-predator sense. The wild yak (Bos mutus) is a Vulnerable high-altitude bovid of the Tibetan Plateau and Himalayas — ancestor of the domestic yak, threatened by hunting, hybridisation and habitat disturbance; remnant populations persist in Pakistan and Nepal. Usual risks are husbandry and handling, not unprovoked attacks.

How long do yaks live?
A precise wild lifespan for yaks is not firmly established in the sources cited on this guide. The wild yak (Bos mutus) is a Vulnerable high-altitude bovid of the Tibetan Plateau and Himalayas — ancestor of the domestic yak, threatened by hunting, hybridisation and habitat disturbance; remnant populations persist in Pakistan and Nepal. Where longevity figures appear in the literature they vary by region, sex and whether animals are wild or captive.

How big is a yak?
A Yak is about 500–1,000 kg (males larger). The wild yak (Bos mutus) is a Vulnerable high-altitude bovid of the Tibetan Plateau and Himalayas — ancestor of the domestic yak, threatened by hunting, hybridisation and habitat disturbance; remnant populations persist in Pakistan and Nepal. Conservation status: Hunting and hybridisation with domestic yaks.

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.

Latest Yak Stories

Quick, fact-checked reads on the yak — amazing facts, key questions and the threats it faces.

Briefings

Stray Dog Rescue in Pakistan: Why Mass Culling Cannot Solve Rabies

Tens of thousands of street dogs are killed in Pakistani cities each year — and rabies cases continue to rise. There is a humane alternative that actually works.

Read the story

Guides

How to Adopt a Dog: A Complete Guide to Dog Adoption and Rescue Dogs

Thinking of adopting a dog? Here is the complete guide to dog adoption, what to expect from rescue dogs, how to find a reputable rescue near you — and how to help the street dogs that cannot be adopted out of trouble.

Read the story

Guides

Dog Shelters, Animal Shelters and Dog Rescues: A Guide to Finding and Trusting One

What's the difference between a dog shelter, an animal shelter and a dog rescue? How do you find a good one near you, and what should you look for before you trust them with a rescue dog — or your money?

Read the story

Explore More Species

Every animal in our network faces a crisis. Learn about the others.

View all wildlife guides
Support Habitat Protection