The spread of mosquitoes and their preference of different habitats to the habitat and the attack on proximately defined primarily by ecological charac-teristics of individual species, namely moisture-preferance and resistance to aridity. Moisture- loving species attack mainly under the forest cano-py and are confined to the Northern regions with large areas of forests. The Study of species com-position and biotopical distribution of mosquitoes was conducted in the southern taiga subzone and aspen-birch forests of the forest zone and in forest-steppe zone of the Tyumen territory in 2004-2014. Ecological requirements of different species vary, so they inhabit different vegetation composition of habitats. Arid-resistant species generally prefer forest edges, meadows and common in the south-ern zones, where forests occupy a small area. The work was carried out two times a decade in the evenings at 19-20 o’ clock. To determine the spe-cies composition of adult Culicidae mosquitoes special identification keys were used with the re-lease of the subgenus Ochlerotatus in the rank of genus. All species of mosquitoes of the investigat-ed region can be divided into three groups: 1) the attackers only under the forest canopy; 2) forwards only in an open area; 3) actively forwards in both habitats. The majority of species of blood-sucking mosquitoes on the South of Tyumen territo-ry attacks under the forest canopy and in open are-as. The greatest ecological plasticity in relation to inhabiting different biotopes has Och. cantans.
Aedes, Ochlerotatus, Culiseta, Culex, Anopheles, blood-sucking mosquitoes, biotope, Aedes, Ochlerotatus, Culiseta, Culex, Anopheles
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