What season do dragonflies usually appear?

In summer, dragonflies generally live in still water environment such as ponds, lakes and swamps in low altitude areas, and their larvae develop in water.

Generally, it appears in groups after a storm or during a light rain. At this time, there is more water in the air, and water droplets will adhere to small insects, which will reduce their flying speed and height. Why not? Just look at the ecology. Water pollution has reduced the water area.

Extended data

dragonfly

Dragonflies, invertebrates, arthropods, Insecta, Winged Subclass, Odonata, Heteroptera, Odonata and Odonata.

Generally, the body is large, the wings are long and narrow, and the membrane veins and reticular veins are extremely clear. Vision is extremely sensitive, with 3 eyes; Antenna 1 pair, thin and short; Chewing mouthparts. The abdomen is slender, flat or cylindrical, with anal appendages at the end. Feet are thin and weak with hooks and thorns, which can catch pests when flying in the air. Larvae (larva) develops in water and breathes through rectum, trachea and gills in water.

Generally, it takes more than 1 1 times to molt, and it takes more than 2 years to climb out of the water along the aquatic plants, and finally molt and emerge as adults. Larvae can prey on old and other small animals in the water, and sometimes the same kind will eat each other. Adults usually fly in ponds or rivers and prey on flying insects. In addition to a large number of harmful insects such as mosquitoes and flies, some can prey on butterflies, moths, bees, etc. In fact, these are beneficial insects. There are more than 5000 known dragonfly species.