Is it that the hotter the weather, the louder the cicada's cry will be?

Cicada is a Hemiptera, and there are 120 species in China. When summer comes, it will stand on the tree and keep barking, and its voice will spread far away.

Cicada is an insect, also known as cicada. There are many kinds. The male cicada has a sound generator in its 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.

Larvae live in the soil and suck the roots of plants. After living underground for 4 years, they will get out of the ground and enjoy the scenery for a while. Adults only suck the juice of plants.

Cicada's life goes through three different periods: egg, larva and adult. Eggs are laid on trees, larvae live underground, and adults return to trees. After the cicada mated, the male cicada completed his mission and died soon. The female cicada began to lay eggs. She poked holes in the branches with a pointed ovipositor, producing four or eight at a time. A branch often needs dozens of holes, and then the female cicada dies soon without eating or drinking. Eggs overwinter in the branches, and only in the next summer, with the help of the temperature of the sun, larvae can hatch.

There are many kinds of cicadas in the world, including more than 3,000 species, and there are about 200 known species in China. 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". There is "Qiu Chan" in autumn, and when singing, you shout "Take it-take it"; There is a "winter cicada" in winter, and when you sing it, you shout "It's over-it's over".

Why do cicadas like to sing loudly and scream at the top of their lungs? Fabres, a famous French entomologist, was puzzled. He lived for more than 90 years, devoted his whole life to the study of entomology, and wrote a collection of 654.38+100,000 words of research papers-Insects. He has observed and studied cicadas for many years and made a vivid and detailed description. He described the cicada's singing like this: "In the cavity behind the cicada's wings, there is a cymbal-like instrument. It is not satisfied, but also put a castanet on its chest to enhance the intensity of the sound. This cicada really made great sacrifices to satisfy her love of music. Because of this huge castanet, living organs have nowhere to put, so they have to be pressed to the smallest corner. Shrinking the internal organs for placing musical instruments is of course very enthusiastic about music. "

However, in order to find out why the cicada sings endlessly with the cymbals on its "belly", did Fabres deliberately raise his "voice" because he didn't hear his loud voice at all, fearing that others wouldn't hear him so clearly? So, he did an experiment to verify whether the male cicada could hear the sound.

He stood behind the male cicada, talking loudly at close range, blowing his whistle hard, slapping his face, throwing stones at him ... and scaring the cicada with all kinds of noises. But cicadas continue to sing indifferently. I really turned a deaf ear to what was behind me and only sang a song with my heart. Later, Fables simply found two muskets to shoot the beast, filled with gunpowder, and fired again and again next to the cicada. The voice was thunderous, but the "singers" sang leisurely without even showing any fear or anxiety. So Fabres concluded that the male cicada had no hearing. He couldn't hear any sound around him, even his own screams. He is really deaf.