The helmints of hazel grouse Tetrastes bonasia L. on the territory of the Yenisei plain

The goal of the research was to study the hel-minthes fauna composition of hazel grouse in the southern and middle taiga of the Yenisei plain. Helminthological research with marking of five ha-zel grouse habitats was more complete undertaken in the southern taiga. They were presented by typi-cal boreal forest along the Tugan and Romanovka rivers, along the Bobrovka river - subtaiga, differing degrees of moisture (bogs) and the composition of the forest stand. Two other subtaiga ranges (the rivers of Abeyka and Zaplyvnoe) had different de-gree of human impact. The basin of the Abeyka riv-er is characterized by fragments of old clear-cutting of pine forests, riparian spruce forests, thickly wooded with shrubs and low forests. The last range (the village Zaplyvnoe) is a mixed subtaiga located in the immediate vicinity of the former village. The part of the right bank of the Yenisei river, located more than 800 kilometers north of the studied ranges of southern taiga was investigated in the middle taiga. Collection of material was carried out in the autumn in 2010, 2011 and 2013. As a whole 85 birds were investigated. 9 helminth species, among which cestodes dominated (6 types): Da-vainea proglottina, D. tetraoensis, Skrjabinia cesti-cillus, Fuhrmannetta globocaudata, Rhabdometra tomica and Idiogenia sp, less different fluke (2 types): Leucochloridium sp, Corrigia bonasia and nematodes were represented by one species, i.e. Capillaria caudinflata were isolated. Most species were typical representatives of grouse birds' para-site fauna. The greatest species diversity of hel-minthes fauna was observed in a typical southern taiga - 88.9 %, while in the middle taiga the spe-cies composition percentage did not exceed 44 % from the total number of isolated agents. The ques-tions of hazel grouse invasion by helminthes in connection with nutrition and other environmental factors considered in the current paper, the data on infected birds was presented. The unfavorable epi-zootological situations concerning davaineosis and capillariosis of grouse birds were identified during the work.