Home – Home – Jornals – Contemporary Problems of Ecology 2006 number 4

The night emergence was established for 30 species and subspecies of dragonflies in temperate latitudes of West Asia. This phenomenon is most characteristic of the plains in Middle Asia, where 20 species with nigh transformation are known; for a half of them, it is obligate. In southern mountains and in West Siberia, the night emergence was observed for seven taxons. The adaptive value of dragonfly issue and flying away from water reservoirs during the dark period lies in avoidance of extremely high day temperature, dryness and insolation, on the one hand, and preying on the other.