Snow leopard

Name and taxonomy

The species name uncia and the old English name ounce both come from the Old French once, itself from the Greek for lynx. Panther comes from the Latin panthera and the Greek panther, a word for a spotted cat. Johann Schreber named the cat Felis uncia in 1777, working from a description by Buffon that wrongly placed it on the Barbary Coast. In 1854 John Edward Gray proposed the genus Uncia for Asian cats with long, thick tails. The snow leopard sat alone in that genus for more than a century, and Reginald Pocock used Uncia uncia in 1930.

Genetic studies later showed it belongs inside Panthera, next to the tiger, so it is now Panthera uncia. In 2017 a study proposed three subspecies. P. u. uncia lives in the Pamirs, the Mongolian cats are P. u. irbis, and P. u. uncioides holds the Himalaya and Qinghai. Other researchers dispute that split, and many still treat the species as a single form with no subspecies. In Mongolian and Russian the cat is the irbis, and the Turkic name aq bars means white leopard.

Evolution and relatives

The snow leopard is the sister species of the tiger. Their shared line split from other Panthera cats about 4.62 to 1.82 million years ago. The two probably parted 3.7 to 2.7 million years ago. The genus Panthera most likely arose in northern Central Asia. Panthera blytheae, a fossil cat from western Tibet, has a skull like a snow leopard's. It was called the oldest Panthera, though that is disputed. The mitochondrial genes of the snow leopard, leopard and lion are more alike than their nuclear genes, which suggests their ancestors once interbred.

The oldest sure fossil of the modern species comes from Niuyan Cave in China and dates to the Late Pleistocene. A Middle Pleistocene cat from the Zhoukoudian Peking Man site looks much like it. Fossils from France and Portugal have been named as European snow leopard subspecies, P. u. pyrenaica and P. u. lusitana. They may record a spread of snow leopards into Europe, or European leopards that evolved a similar build for rocky ground.

Appearance

The snow leopard is a stocky, short-legged cat, slightly smaller than the other Panthera species. It stands up to 56 centimetres at the shoulder, and the head and body run 75 to 150 cm. The tail is 80 to 105 cm long, thick with stored fat and wrapped in dense fur. Males average 45 to 55 kilograms and females 35 to 40 kg. Large males reach 75 kg, and small females fall below 25 kg.

The fur is whitish to smoky grey, with a white belly. Solid black spots mark the head, neck and lower legs, and larger rosettes cover the back, flanks and tail. Winter fur grows to about 5 cm on the back and up to 12 cm on the belly, and the coat moults twice a year. Cubs have black stripes down the spine that break into rows of long rings as they grow.

The head is small and broad, with a short muzzle, a domed forehead and very large nasal cavities. Those cavities warm and moisten the thin, cold air with every breath. The ears are small and rounded, which cuts heat loss. The paws are huge for the cat's size, with fur on the soles for grip and warmth. The canine teeth are about 28.6 millimetres long and more slender than in other big cats.

Habitat and range

The snow leopard lives in 12 countries, from Afghanistan, Pakistan, India, Nepal and Bhutan in the south to Kazakhstan, Mongolia and Russia in the north. Its range runs from the Hindu Kush and Karakoram through the Pamirs, Tian Shan and Himalaya, across the Tibetan Plateau to the Altai and Sayan. About 60% of that range lies in China, mainly in Xinjiang, Tibet, Qinghai, Sichuan and Gansu. The whole range covers about 2.3 million square kilometres, but the cat is spread thinly across it. GBIF holds records from 18 countries, which includes zoo animals.

It favours steep, broken ground: cliffs, ridges, ravines and rocky slopes above the tree line. Alpine meadows, alpine steppe and open conifer forest all serve, but it avoids dense forest and farmland. Most cats live between 3,000 and 4,500 metres, and in summer they range from 2,700 up to 6,000 m. In winter they follow their prey down to 1,200 to 2,000 m, and in the north of the range they live lower all year. A snow leopard can push through snow 85 cm deep, but it prefers trails that other animals have already made. In Mongolia cats have crossed 20 to 65 km of flat, open ground to reach isolated mountain blocks.

Diet and hunting

The snow leopard eats meat, and mountain sheep and goats make up most of its diet. Its main prey are blue sheep, Himalayan tahr, argali, markhor, Siberian ibex and urial. It prefers animals of 36 to 76 kilograms, but it can kill prey up to three times its own weight. Marmots, pikas, hares, voles and pheasants matter too, and marmots may supply 45% of the meat in summer. Droppings from Pakistan held rhesus macaque, palm civet, hare and several mice and rats. The cat also eats twigs and grass on purpose, especially the shoots of tamarisk bushes.

It hunts by walking ridge lines, animal trails, river terraces and the beds of gorges. It stalks from above, hidden by rock and scrub, then launches down the slope. The chase runs up to 300 metres, and the cat can leap about 9 m in one bound. It kills with a bite to the neck, drags the carcass to a safe spot and eats every edible part. It often moves a kill to hide it from crows and vultures. One blue sheep feeds a single cat for a week or two, and an adult needs about 20 to 30 blue sheep a year.

Where wild prey has been hunted out, it turns to sheep, goats, cattle, horses, yaks and dogs. In Mongolia domestic sheep still make up less than 20% of its diet. It is easily driven off a kill and rarely fights to keep it. Mating pairs sometimes hunt together.

Behaviour and social life

The snow leopard is solitary, and it is most active at dawn and dusk. Radio-tagged cats in Mongolia were active 37% of the time, least in the afternoon and most between 20:00 and 04:00. Where people leave it alone it hunts by day, and where it takes livestock it hunts mostly at night. It rests near cliffs and ridges that give shade and a view, and it shifts its bed several times a day.

In Nepal's Shey Phoksundo National Park, five collared cats used ranges of 12 to 39 square kilometres that overlapped widely, yet they rarely met. Males moved 0.5 to 5.45 km a day in a straight line, and females 0.2 to 2.25 km. Their zigzag paths covered up to 7 km a night. In the Gobi, where prey is sparse, male ranges ran 144 to 270 km² and female ranges 83 to 165 km². About 40% of the 170 protected areas across the range are smaller than one male's home range. Good habitat holds up to 10 cats per 100 km², while poor habitat may support five in 1,000 km².

Cats that share a range keep about 2 km apart and avoid each other by reading scent marks. Males do not tolerate other males, so they are probably territorial. It is so shy that most people who live beside it never see one.

Communication and senses

The snow leopard cannot roar. Its vocal folds are only 9 millimetres long and give little resistance to airflow, even though its hyoid bone is partly ossified. Instead it mews, grunts, moans and yowls, and it can purr as it breathes out. A female in heat gives a long, high yowl in the evening to bring in a male. A soft chuff through the nostrils, called prusten, greets another cat.

Scent does most of the talking. The cat scrapes the ground with its hind feet, then leaves urine or droppings on the scrape. It sprays urine on rocks, choosing the sheltered undersides of boulders where rain cannot wash the mark away. Scrapes cluster along ridge lines, the base of cliffs, river terraces and stream junctions, and busy routes are re-marked often. The urine carries compounds such as pentanol, hexanol and indole that probably encode sex and breeding state. Cats also rub heads and necks on a partner, rake claws down tree trunks, and bare their canines when defensive.

Reproduction and life cycle

Unlike most big cats, the snow leopard has a fixed breeding season. Mating runs from January to March, when scent marking and calling rise sharply. A female is in heat for five to eight days and mates 12 to 36 times a day over three to six days. A male rarely seeks a second mate, probably because the season is too short. Females usually breed every second year, because they spend so long raising cubs.

Gestation lasts about 100 days, and cubs are born between April and June. A litter usually holds two or three cubs, rarely up to five, and in exceptional cases seven. The mother gives birth in a cave or rock crevice lined with fur shed from her belly. Cubs weigh 320 to 567 grams at birth, are blind and wear a thick woolly coat. Their eyes open at about seven days and they walk at five weeks. Weaning ends by about 10 weeks, at a weight near 6 kilograms.

Cubs leave the den at two to four months and follow their mother, though at first they hinder her hunting. They depend on her for up to 18 months. In Mongolia's Tost Mountains, cubs left their mothers at 20 to 22 months and still rejoined them for a few days at a time. Cats mature at two to three years, but rarely breed before four. Wild snow leopards live 15 to 18 years, and one captive cat reached 25.

Predators and threats

An adult snow leopard has no natural predator. A common leopard may kill one where their ranges meet, and adult males can kill cubs. People are the real danger, through poaching, revenge killings and the loss of prey. Herders shoot or poison cats that take livestock, and every year many die that way. Poisoning campaigns against pikas and marmots have stripped away an important small prey.

Skins and bones fuel an illegal trade centred on Kashgar in Xinjiang, with links through Kazakhstan to Russia and China. China loses an estimated 103 to 236 cats to poachers each year, Mongolia 34 to 53, Pakistan 23 to 53 and India 21 to 45. Between 2003 and 2016, 710 skins were traded, and 288 of them were seized. Bones now stand in for tiger bone in traditional medicine, and skins still trim traditional dress in Tibet and Mongolia. A warming climate is expected to push the tree line up and shrink alpine habitat in the Himalaya by about 30%.

Population and conservation

The IUCN Red List rates the snow leopard as Vulnerable. The global population is put at about 4,000 to 6,500 animals, and fewer than 10,000 mature cats survive. Numbers are expected to fall by about 10% by 2040. India counted 718 snow leopards in 2024, with 124 in Uttarakhand and an estimated 380 to 598 in Ladakh. Surveys on the Tibetan Plateau between 2015 and 2021 gave 755 to 1,341 cats across 360,000 km². Pakistan holds about 100 to 239, most of them in the Pamir and Karakoram.

The species is on CITES Appendix I, and hunting it is banned in almost every range country. Kyrgyzstan outlawed hunting in the 1950s, Nepal in 1973, Afghanistan in 1986 and China in 1989. In India poaching carries three to seven years in prison, and in China at least 10 years. Russia's Red Data Book lists it as threatened with extinction, and iNaturalist notes that status too. In 2013 all 12 range countries met in Bishkek and agreed to protect the cat and its mountains across borders.

Conservation groups pay herders for livestock losses and help them build predator-proof corrals. Zoos have bred the cat since the 1990s, and by 1986 American zoos already held 234 animals. iNaturalist holds only 1,191 observations of the species, which shows how rarely it is seen.

Relationship with humans

The snow leopard avoids people, and no wild attack on a human is known from most of its range. Only three attacks are recorded. A rabid cat and an old toothless cat struck near Almaty, and a tourist was mauled in China in 2026. None was fatal. The cat's only real harm to people is the killing of sheep, goats and yaks.

For herders in Ladakh, Mongolia or the Pamirs, one raid on a corral can cost a year's income. Insurance schemes and better night pens have cut those losses in many valleys. Zoos value the cat highly, because so few people ever see one in the wild. The Moscow Zoo showed the first captive snow leopard in 1872, and the Bronx Zoo followed in 1903. Camera traps near Almaty caught snow leopards 65 times in one year, on the edge of a city of millions.

In culture and myth

Across Central Asia the snow leopard is a symbol of nobility and strength. The Aq Bars, the white leopard, is a political emblem of the Tatars, Kazakhs and Bulgars. A winged Aq Bars appears on the coat of arms of Tatarstan and the seal of Samarkand. The cat is on the seal of Almaty, the emblem of Bishkek and the former 10,000 tenge banknote of Kazakhstan. Ladakh and Himachal Pradesh in India have made it their state animal, and Afghanistan, Kazakhstan and Kyrgyzstan treat it as a national symbol.

The Kyrgyz people hold the cat sacred and see it as a noble mountain animal of strength and courage. In Mongolian belief it is a spirit animal or a messenger of the gods. Mountain peoples probably cast it as a shape-changing spirit because it vanishes so completely among the rocks. In some traditions the cat purifies the land, so hunting it was forbidden. Peter Matthiessen's 1978 book The Snow Leopard tells of a two-month search for the cat in the Dolpo region of Nepal.