Abstract. There are 25 specially protected natural areas of various status have been organized on the territory of the Khanty-Mansiysk Autonomous Okrug Ugra. Despite their great nature conservation value, the degree of study of flora and fauna, as well as the ecology of plants and animals in the territory of most of them, remains relatively low. Until now, special studies of small terrestrial vertebrates inhabiting the Cheuskinsky Bor have been carried out. In 2020, our research of small terrestrial vertebrates were carried out. The purpose of the study is to identify the species composition and some features of ecology (abundance, biotopic distribution) of small mammals, amphibians and reptiles. The research was carried out in July-September 2020. Metal cones were used to catch most of the vertebrate species. A total of 7400 cone-days have been worked out. 10 species of small mammals and 3 of amphibians are registered. The species composition of small mammals at the Cheuskinsky Bor site is relatively poor, 10 species were captured by cones, 3 were marked visually. The group of dominants included the common shrew and the red-backed vole. They accounted for 22% and 77%, respectively, of all recorded animals. Reptiles in the 2020 season were not registered in the counts, however, according to the literature, the habitat of the common European adder and viviparous lizard is known. Among amphibians, the moor frog and Siberian salamander are rare, the European toad is common. In the future, when conducting annual studies, the list of small mammals can be supplemented by 714 species of insectivores, bats and rodents, the list of amphibians 1 species.

The studies were conducted on the territory of the Khanty-Mansiysk Autonomous Okrug Yugra (Surgutskiy District) in 20182020 in the Surgut natural wildlife reserve and in 2020 in the vicinity of the Kamennyi Cape ski resort on the left bank of the middle Ob. The paper notes the poor knowledge of the distribution of the Altai mole in the forest zone of Western Siberia, especially on the northern and western borders of the range. Hence, there is almost complete lack of information on its biology and ecology in the area. The Altai mole was collected while counting other small mammals using trapping grooves and guiding fences made of polyethylene membrane; a total of 43 individuals were counted. As in other parts of the forest zone of Western Siberia, the Altai mole near the northern border of the range the left bank of the Middle Ob is confined to mixed and small-leaved forests with rich undergrowth and grassy layer. During the observation period, the maximum abundance of the Altai mole was in 2019. In 2018 and 2020 its abundance was 26 times lower. One of the reasons for such fluctuations can be abiotic factors, in particular, the difference in winter temperature conditions, the height of the snow cover and others. Information about freezing of both Talpa europaea Linnaeus, 1758, and Talpa altaica Nikolsky, 1883, moles during little snowy harsh winters is known.