Cicada is an HOMOPTERA insect with many species, including 120 species in China. The male cicada has a sound generator in the abdomen, which can make a loud sound continuously; Although the female cicada also has a sounder in her abdomen, she doesn't make a sound. When summer comes, the male cicada will stand on the tree and call "cicada-cicada-cicada" endlessly, and his voice will spread far away. It is also because of his voice that he calls it cicada.

The high note in the cicada family is a cicada called "double drummer". There are large ring-shaped vocal organs on both sides of its body, and a disk that can be opened and closed inside and outside is in the middle of its body. The opening and closing speed of the disc is very fast, which is the reason for shaking cicada. This sound lacks change, but it is much louder than the call of the jungle canary.

There are many kinds of cicadas all over the world, with more than 3000 species. In China, the land is vast, and cicadas sing all year round. There is a "spring cicada" in spring, and when you sing it, you shout "wake up-wake up"; In summer, there is a "Xia Chan". When singing, shout "It's hot-it's hot" and "Know-Know". In autumn, there is a "Qiu Chan" who cries "Take-Take" when singing; There is a "winter cicada" in winter, and when you sing it, you shout "It's over-it's over".