After the adult sexual maturity, the males begin to chirp and attract females to mate. After mating, the male dies and the female dies after laying her egg, thus completing her mission to pass on her seed.
Cicadas belong to the incomplete metamorphosis gradual metamorphosis class. The general life history is long, 2 to 3 years to complete a generation. The most famous species to the United States of America's 17-year cicada, in addition there are three kinds of 13-year cicada, they are insects in the longevity. Cicadas have a more peculiar way of life. In summer, cicadas die within a week after laying their eggs, which hatch after about a month, and after hatching, the wakame falls to the ground and digs a hole of its own to burrow into the soil to live.
In the soil, they live by sucking sap from tree roots with their prickly sucking mouthparts. They go through a long waking period. After crawling out of their burrows, the old mature larvae slowly climb up the trunks of trees and then split open from the cephalothorax. Soon, the adult crawls out of the cicada shell, and the wings spread and dry by the sunlight. The feathering process takes about 1 to 3 hours. Adults fly to the jungle canopy, piercing the branches of trees with their piercing-sucking mouthparts to suck sap, causing harm to forests, fruit trees and so on.
The larvae of cicadas live in the soil and have a pair of strong excavating forelegs. They use their stinging mouthparts to suck sap from plant roots, weakening the tree and causing branch tips to die, affecting tree growth. Usually stay in the soil for a few years or even a dozen years, such as 3 years, 5 years, there will be 17 years, these numbers have a **** the same point, are prime numbers. This is because prime numbers have very few factors, which prevents them from burrowing out of the soil with other cicadas and competing for territory and food.
When they are about to be feathered, they drill out of the soil surface at dusk and at night, climb up a tree, then grasp the bark and molt to feather. When a black crack appears on the back of the cicada pupa, the process of molting begins, with the head coming out first, followed by revealing the green body and folded wings, staying for a few moments to make the wings harden and darken in color, and then starting to take off. The whole process takes about an hour.
Late June, the larvae began to feather into adults, just feathered cicadas green, the longest life span of about 60 to 70 days. late July, the female adult began to lay eggs, in early and mid-August for the peak of egg-laying, the eggs are mostly laid in the tops of the branches of 4 to 5 millimeters thick. In summer, they scream loudly in the trees, sucking sap with their needle-prick mouthparts, and the larvae inhabit the soil, sucking sap from the roots, which is harmful to the trees.