About Uncia uncia (Schreber, 1775)
The snow leopard, scientifically named Uncia uncia (Schreber, 1775), has whitish to grey fur with black spots on its head and neck, and larger rosettes on its back, flanks, and bushy tail. It has a short muzzle, domed forehead, and large nasal cavities. Its fur is thick, with hairs 5 to 12 cm (2.0 to 4.7 in) long, and its underbelly is whitish. Snow leopards have a stocky, short-legged build and are slightly smaller than other cats in the genus Panthera. They reach a shoulder height of 56 cm (22 in), with a head-to-body length ranging from 75 to 150 cm (30 to 59 in), and a tail 80 to 105 cm (31 to 41 in) long. On average, males weigh 45 to 55 kg (99 to 121 lb) and females weigh 35 to 40 kg (77 to 88 lb); large males up to 75 kg (165 lb) and small females under 25 kg (55 lb) have also been recorded. Their canine teeth are 28.6 mm (1.13 in) long and more slender than those of other Panthera species. The snow leopard has multiple adaptations for living in cold, mountainous environments. Its small, rounded ears help minimize heat loss, while its broad paws effectively distribute body weight to allow walking on snow. Fur on the undersides of its paws improves grip on steep, unstable surfaces and also reduces heat loss. Its long, flexible tail helps it balance in rocky terrain. The tail is very thick due to fat storage, covered in a thick layer of fur, and the snow leopard uses it like a blanket to protect its face when asleep. The snow leopard differs from other Panthera species in having a shorter muzzle, elevated forehead, vertical chin, and a less developed posterior process of the lower jaw. Although it has a partly ossified hyoid bone, the snow leopard cannot roar, because its short 9 mm (0.35 in) vocal folds provide little resistance to airflow. Its nasal openings are large relative to its skull length and palate width; this size optimizes the volume of air inhaled with each breath and warms cold dry inhaled air. It is not specially adapted to high-altitude hypoxia.
Snow leopards are distributed across a broad range extending from west of Lake Baikal through southern Siberia, into the Kunlun Mountains, Altai Mountains, Sayan and Tannu-Ola Mountains, the Tian Shan, through Tajikistan, Kyrgyzstan, Uzbekistan and Kazakhstan to the Hindu Kush in eastern Afghanistan, the Karakoram in northern Pakistan, the Pamir Mountains, the Tibetan Plateau, and the high elevations of the Himalayas in India, Nepal and Bhutan. In Mongolia, it inhabits the Mongolian and Gobi Altai Mountains and the Khangai Mountains. In Tibet, it occurs as far north as the Altyn-Tagh. It has been recorded by camera traps at 16 locations in the isolated Wakhan Corridor of northeastern Afghanistan. The snow leopard lives in alpine and subalpine zones at elevations from 3,000 to 4,500 m (9,800 to 14,800 ft), and also occurs at lower elevations in the northern part of its range. In summer, it typically lives above the tree line on alpine meadows and in rocky regions at elevations from 2,700 to 6,000 m (8,900 to 19,700 ft). In winter, it descends to elevations around 1,200 to 2,000 m (3,900 to 6,600 ft). It prefers rocky, broken terrain, and can travel through snow 85 cm (33 in) deep, but it prefers to use existing trails made by other animals. At the end of 2020, 35 cameras were installed on the outskirts of Almaty, Kazakhstan to attempt to capture footage of snow leopards. In November 2021, the Russian World Wildlife Fund announced that snow leopards had been spotted 65 times on these cameras in the Trans-Ili Alatau mountains since the cameras were installed. Potential snow leopard habitat in the Indian Himalayas is estimated at less than 90,000 km2 (35,000 sq mi) across Jammu and Kashmir, Ladakh, Uttarakhand, Himachal Pradesh, Sikkim and Arunachal Pradesh; about 34,000 km2 (13,000 sq mi) of this area is considered good habitat, and 14.4% is protected. In the early 1990s, the Indian snow leopard population was estimated at 200–600 individuals living across around 25 protected areas. In 2024, the Indian snow leopard population was estimated at 718 individuals total: 124 in Uttarakhand, 51 in Himachal Pradesh, 36 in Arunachal Pradesh, 21 in Sikkim, and nine in Jammu and Kashmir. As of 2024, the population in Ladakh is estimated at 380–598 individuals, with a population density ranging from about 0.2 individuals per 100 km2 (39 sq mi) in Changthang Wildlife Sanctuary to about two individuals per 100 km2 (39 sq mi) in Hemis National Park. Following 2025 surveys, an estimated 83 adult snow leopards live in Himachal Pradesh, with a population density of 0.16–0.53 per 100 km2 (39 sq mi).
Snow leopard vocalizations include meowing, grunting, prusten, and moaning, and they can purr when exhaling. Snow leopards are solitary, and are mostly active from dawn to early morning, and again in afternoons and early evenings. They mostly rest near cliffs and ridges that provide vantage points and shade. In Nepal's Shey Phoksundo National Park, the home ranges of five adult radio-collared snow leopards overlapped heavily, though the individuals rarely met. Their individual home ranges ranged from 12 to 39 km2 (4.6 to 15.1 sq mi). Males traveled between 0.5 and 5.45 km (0.31 and 3.39 mi) per day, and females between 0.2 and 2.25 km (0.12 and 1.40 mi), measured as straight-line distances between survey points. Because they often zigzag through steep terrain, their actual travel distance can reach 7 km (4.3 mi) in a single night. Up to 10 individuals can inhabit an area of 100 km2 (39 sq mi); in habitats with sparse prey, an area of 1,000 km2 (390 sq mi) usually supports only five individuals. A study conducted in the Gobi Desert from 2008 to 2014 found that adult males had an average home range of 144–270 km2 (56–104 sq mi), while adult females had home ranges of 83–165 km2 (32–64 sq mi). The home ranges of these individuals overlapped by less than 20%. These results indicate that around 40% of the 170 protected areas within snow leopard range countries are smaller than the home range of a single adult male snow leopard. Snow leopards leave scent marks to mark their territories and common travel routes. They scrape the ground with their hind feet before depositing urine or feces, and also spray urine onto rocks. Their urine contains many characteristic low molecular weight compounds with diverse functional groups including pentanol, hexanol, heptanol, 3-octanone, nonanal and indole, which may play a role in chemical communication.
Snow leopards reach sexual maturity at two to three years old, and normally live 15–18 years in the wild. In captivity, they can live up to 25 years. Oestrus typically lasts five to eight days, and males usually do not seek another mate after mating, likely because the short mating season does not leave enough time for multiple matings. Paired snow leopards mate in the standard felid posture, from 12 to 36 times per day. Unlike most other large cats, snow leopards have a well-defined birth peak. They usually mate in late winter, a period marked by a noticeable increase in marking and calling. Females have a gestation period of 90–100 days, and cubs are born between April and June. A litter usually has two to three cubs, and in exceptional cases can have up to seven. The female gives birth in a rocky den or crevice lined with fur shed from her underside. Cubs are born blind and helpless, but already have a thick fur coat, and weigh 320 to 567 g (11.3 to 20.0 oz). Their eyes open around seven days after birth; cubs can walk at five weeks old and are fully weaned by 10 weeks old. Cubs leave the den when they are around two to four months of age. Three radio-collared snow leopards in Mongolia's Tost Mountains gave birth between late April and late June. Two female cubs began to separate from their mothers at 20 to 21 months old, but reunited with their mothers several times for a few days over a period of 4–7 months. One male cub separated from his mother at around 22 months old, stayed near her for a month, and moved out of his natal range at 23 months old. The snow leopard has a generation length of eight years.
