The film shows different species of blood-sucking insects and informs about behaviour peculiarities of blood-sucking flies and ticks.
A midge in the forest.
Ticks on the sheet.
An open pond.
A mosquito sucking blood (animation).
Horsefly sucking blood (animation).
A tick on a blade of grass.
A tick sucking blood (animation).
The female tick lays eggs.
A patient with tick-borne encephalitis.
Felling of the forest.
Mosquitoes on human skin.
A lumberjack smears his face with a repellent.
Entomologists and virologists in the forest identify foci of tick-borne encephalitis.
Treatment of the territory with toxic chemicals from the air.