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Mosquitoes or bloodsucking mosquitoes a family of dipteran insects belonging to Groups Nematocera the female imagoes which in most cases are complex component midges. Characteristic for this family mouthparts upper and lower lip are elongated and form a pouch which is placed in a long thin needle the male jaw are underdeveloped they do not bite. Moveable larvae and pupae of mosquitoes live in stagnant waters. Fossil mosquitoes are known from the Cretaceous period. In today's world there are more than 3000 species of mosquitoes belonging to 38 genera. In Russia home to representatives of 100 species belonging to the genera of these mosquitoes Anopheles mosquitoes Toxorhinchites Coquillettidia .

Mosquitoes are widely distributed around the globe and inhabit all continents except Antarctica. The widest area of Culex pipiens which is distributed everywhere where he meets a man his primary victim. In warm and humid tropical regions they are active throughout the year but in temperate climates they hibernate as adults during the cold season. Arctic retain activity over a few weeks in the year when the heat generated water pools thermokarst in the upper part of permafrost. However, during this time they manage to breed in large quantities mosquito pack may take up to 300 ml of blood per day per animal in the herd caribou. Eggs found in temperate latitudes are more resistant to the negative effect of cold than mosquito eggs common in warmer climatic zones. They can even tolerate the impact of the snow and the effect of negative temperatures. In addition, adults can survive throughout the winter in conditions suitable to their wintering habitat.

Distribution of various species worldwide and moving them long distances to areas where they are not natives was due to the man. First of all this tour of the waterways in which eggs larvae and pupae of mosquitoes are transported in water-filled used tires or tarakh with cut flowers. However other than maritime transport are actively mastered the movement on personal vehicles trucks trains and even aircraft. Thus the spread is difficult to control and even quarantine measures have proved ineffective and difficult to implement in practice.

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