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Egorov O.V. (1955). Enemies, infections, parasites and mortality rate of ibex (Vol. Vol. 42.).
Abstract: Reasons for ibex and argali mortality from natural enemies, parasites, infections, accidents, and hunters are analyzed. Snow leopard is one of the most dangerous enemies of ibex and argali, preying equally on both young and mature animals (mostly males). Snow leopard feeds upon ibex all year round. Unlike wolf, snow leopard would never kill several animals at a time, but only one selected victim. The food remains left by these predators are different in terms of the skull gnawing. Nasal bones and eye-sockets on the skull of ibex killed by snow leopard remain undamaged, while wolf gnaws off nasal part of the skull, breaks eye-sockets, eats lower jaw, widens occipital hole and pulls out brains. Snow leopard leaves large pieces of skin around the skeleton of the victim, whereas wolf tears it to shreds or eats up fully. Sometimes parts of the victim left by snow leopard are eaten by wolf. It is easy to mix the remains of snow leopard's or griffon vulture's food. The remains differ in skin being turned inside out rather than torn to large pieces.
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Bannikov A.G. (1971). Genus Panthera.
Abstract: It gives the description of genus Panthera: lion, tiger, leopard, jaguar and snow leopard. The mountains of Central Asia and South Siberia limit the habitat of snow leopard in the USSR. This species is also distributed in the Himalayas, Tibet, and mountains of Mongolia. In summer, it lives at 3,660 3,970 m above sea level, while in winter, following the ungulates; snow leopard descends to 1,800 m. In the Himalayas, it ascends up to 5,500 m above sea level in summer. In Djungar and Talas Ala-Tau, snow leopard keeps at 600 1,200 m. It takes refuge in caves and cracks of rocks. Snow leopard is mostly active in twilights and night, rarer in daylight, and preys on ungulates, hares, marmots, and others. The coupling period is winter or early spring. A gestation is about 90 days. It has 3 5 cubs in a litter.
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Koshkarev, E., & Vyrypaev, V. (2000). The snow leopard after the break-up of the Soviet Union. Cat News, 32, 9–11.
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Flint V.E. (1970). The cats – Felidae.
Abstract: Description of 12 cats species from USSR (Felis silvestris, Felis libyca, Felis euptilura, Felis chaus, Felis lynx, Felis caracal, Felis •…‹u1, Felis margarita, Felis tigris, Felis pardus, Felis uncia, Aci‹Œ‹¢o jub…tus) is given. Snow leopard inhabited in mountain ridges of Kazakhstan, Middle Asia, Altai and Sayan.
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Formozov A.N. (1952). Tiger and snow leopard.
Abstract: Over the last decades tiger, leopard and snow leopard were fully exterminated in many areas, where they formerly were common species and now became very rare ones. Few leopards can still be found in Caucasus, Copet-Dag (Turkmenistan) and south of Primorskiy krai. Irbis is remaining a common species only in the difficult-of-access highland areas of Tien Shan and very rare in the Altai. Tiger traces are sometimes found in the Amudarya river valley and in the taiga Sihote-Alinya in the Far East.
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Formozov A.N. (1989). Tiger. Leopard. Snow Leopard.
Abstract: The number of large cats is reducing. These animals are hold out in the most difficult of access places. During long time snow leopard was a poorly known animal. The situation was changed with developing of mountain tourism and mountaineering. It's necessary to reduce the capturing snow leopards for zoological gardens.
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Bannikov A.G. (1973). Snow leopard (irbis). Felis uncia.
Abstract: Irbis is distributed in highlands of Kazakhstan, Kyrgyzstan, Tajikistan, and Altai. It preys mainly on wild sheep and ibex, marmots, pica, snow-cock, rarer other ungulates, rodents and birds. Sometimes it attacks domestic sheep. At the beginning of spring this species is on heat, gestation period being 90 100 days. Female bears two three (to five) cubs. The litter splits in one year. The animal sheds hair twice a year. It has a low population and therefore hunting for snow leopard is prohibited.
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Geptner V.G. (1972). Genus snow leopard or irbis (Vol. Vol. 2, Part 2.).
Abstract: It describes genus and species features of snow leopard such as appearance, skull, sizes, phylogenetic links, distribution, geographic variability, biology including number, habitat, refuges, activity in daylight and night, behavioral patterns, reproduction, enemies and rivals, and practical use of the species.
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Gromov I.M. (1963). Felis (Uncia) uncia Schreber (1776) leopard or irbis (Vol. Part.2.).
Abstract: An identification table for genus and species of mammals of USSR is given. The taxonomy, morphology, distribution and life history are described. The features of snow leopard Felis (Uncia) uncia, distribution, biology and practical value are described.
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Heiz A.V. (1979). Some legal issues of snow leopard protection in the USSR.
Abstract: Any commercial use or sport hunting for snow leopard is prohibited everywhere. In the USSR, illegal hunting or attempt to hunt was prosecuted according to the criminal or administrative law. The following additional measures are required to successfully protect the species: conducting awareness activity in local communities, continuous control, quick investigating of snow leopard extermination cases, and regular counts of snow leopard population.
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