ARTHROPODS IN THE COLONIES OF ROOKS IN FOREST-STEPPE AND STEPPE OF WEST SIBERIA

Investigation of the composition of Arthropod population in rooks' nests was carried out from 1981 through 1988 in forest-steppe and steppe of West Siberia (the Omsk District). In the ranges of the investigated territory the nidicolous population in the rooks' nests is practically uniform in its composition and abundance dynamics that depends on the nature of the colony position and biological peculiarities of rooks affecting the nest microclimate. Foretic relations between taiga ticks and rooks, without involving feeding on birds, are first noted.