The results of the study on the role of some wild mammals and birds as feeding sources of for ticks Hyalomma marginatum, the main vectors of Crimean haemorrhagic fever virus in the Stavropol Territory, in the preimago phases of their development are presented. These phases (larvae and nymphs) were found on rooks, hooded crows, partridges, European brown hares and eared hedgehogs. The examination of domestic fowl resulted in finding larvae and nymphs in small amounts on turkeys. According to the data of the epizootological survey carried out in summer and autumn of 2000 in the Stavropol Territory, rooks and, to a lesser extent, hares were found to be the main feeding sources for ticks in the preimago phases. Rodents seemed to be of minimal importance as feeding sources under the conditions of the Stavropol Territory. Of all animals, rooks must be the main object in the epizootological survey of the territory.
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