# Yak — Facts, Threats & Conservation

*Bos mutus (Przewalski, 1883)*

> 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.

**IUCN status:** Vulnerable  ·  **WARN range:** Tibet, China, India, Pakistan, Nepal, Mongolia

## Quick facts
| Fact | Value |
| --- | --- |
| 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
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Mammalia
- **Order:** Artiodactyla
- **Family:** Bovidae
- **Genus:** Bos
- **Species:** Bos mutus (Przewalski, 1883)

## Conservation status
- **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.

## Related WARN Himalayan guides
Wild yaks share Pakistan's northern highlands with snow leopards — predators and prey in the same fragile alpine ecosystem. WARN's snow leopard guide covers coexistence between herding communities and mountain wildlife in Gilgit-Baltistan and neighbouring ranges.

Gaur and domestic cattle relatives on this tier illustrate the broader Bos genus across Asia. The wild yak's decline from millions to thousands parallels other large mammal collapses when hunting and habitat disturbance outpace protection.

Protecting high-altitude habitat in Pakistan, Nepal and Tibet benefits wild yaks, snow leopards and the pastoral communities whose livelihoods depend on healthy mountain ecosystems.

## 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.

## Frequently asked questions: Yak
### 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 threatens wild yaks?
Hunting, hybridisation with domestic yaks, habitat disturbance from pastoralism and infrastructure development, and mining in alpine regions are the main threats.

## Sources
- [IUCN Red List — Bos mutus](https://www.iucnredlist.org/species/2890/46373776)
- [Encyclopaedia Britannica — yak](https://www.britannica.com/animal/yak)
- [Wildlife Conservation Society — Tibetan Plateau](https://www.wcs.org/)

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