Dragonflies a*** have six legs.

Dragonflies are carnivorous insects. They prey on flies, mosquitoes, leafhoppers, gadfly midges and small butterfly moths and many other agricultural, forestry and livestock pests. Dragonflies are an important class of natural enemy insects beneficial to human beings. "Dragonflies lay their eggs in water, which is a biological characteristic of dragonflies. Their larvae (larvae) live in the water, the life span varies according to species, the dragonflies are generally 2 years, some as long as 3 to 5 years.

Dragonflies have anterior and posterior wings of different shapes and venation; the bases of the wings are not stalked and are not significantly narrowed; the middle chamber is divided into a triangular chamber and an upper triangular chamber by oblique veins, which are usually of different shapes in the anterior and posterior wings; the two compound eyes are in contact with each other or are separated by a thin slit; the males have one endo-anal appendage; and the four wings are flat on both sides when resting.

Main values

The dragonflies are rich in resources and play an important role in many aspects. First of all, its larvae, as a representative class of aquatic organisms, can monitor the pollution of the water environment; some species contain some active substances in their bodies that can be used as medicinal materials.

Because of its body is rich in protein, amino acids, minerals, etc., so in terms of food has great prospects for development; its beautiful appearance can also be used as a collection or ornamental.