Why do cicadas that live close to each other bark?

Commonly known as cicada, an insect. The largest cicada is 4 ~ 4.8 cm long and its wings are dark brown at the base. It is harmful for trees to crow loudly in summer, and it is harmful for trees to suck tree juice with acupuncture mouthparts. Larvae inhabit the soil to suck root juice. The shell of cicada can be used as medicine.

Cicada is a large herbivorous insect, usually about five or six centimeters long. Their needle-like hollow mouths can pierce trees and suck sap. There are also different kinds of cicadas with similar shapes and different colors. Cicada has three less sensitive eye spots between its eyes and a simple supporting tubule on its wings. These are the primitive characteristics of ancient insect populations.

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.

Cicadas spend the first two or three years of their lives underground, maybe longer. In the meantime, it sucks liquid from the roots. Then one day, I broke out of the ground and found a tree to climb with my instinct to survive. After several years of slow growth, cicada pupa climbed out of the ground as an energy storage body. Its front paws for digging holes can also be used for climbing.

When black cracks appear on the back of cicada pupa, the molting process begins. Molting is controlled by hormones. The front legs of the cicada pupa are hooked, so that when the adult comes out of the empty shell, it can be firmly hung on the tree. It is very important that the cicada pupa must face the tree vertically. This is for the normal development of adult wings, otherwise the wings will be deformed. Cicada, based on the pupa shell, slowly releases itself, just like climbing out of a pair of armor. The whole process takes about an hour.

When the cicada's upper body is free, it spreads its wings upside down. At this stage, cicadas' wings are very soft, and they spread them through body fluids. The body fluid tube spreads its wings by the pressure of liquid. When the liquid is pumped back into the cicada, the spread wings have become hard. If the cicada is disturbed in the process of spreading its wings, it will be disabled for life and may not be able to fly at all.

Cicada's interest

Since ancient times, people have been most interested in the singing of cicadas. It is praised by poets and poets, and expresses noble feelings with the sound of chanting cicadas. What's more, some people keep cicadas in small and exquisite cages and put them in their rooms to listen to their voices to win people's hearts. Indeed, from the spring when flowers are in full bloom to the autumn when green leaves are withered, cicadas have been tirelessly singing a brisk cicada song for people without any Chinese and western musical instruments, adding a deep affection to nature. No wonder people call them "insect musicians" and "singers of nature".

People are intoxicated by the cicada's song, but forget its nature. Do you know that whenever cicadas fall on the branches and sing loudly, they pierce the bark with slender mouthparts and suck the sap of trees, all kinds of thirsty ants, flies, beetles and so on. Will hear the sound to suck the sap, and cicadas will fly to another tree, open another "spring eye" to continue to provide them with drinks, so that if a book can see that cicadas are big pests of trees.

The humming cicada is a male cicada, and its vocal organ is located at the base of the abdomen, like a drum, which is covered with an eardrum. The eardrum vibrates and makes a sound. Because the vocal cord muscles can expand and contract about 65,438+0,000 times per second, and the gap between the cover plate and the eardrum can play a role of * * *, its singing is particularly loud. And you can take turns singing in different tones. The female cicada is a "dumb cicada" because her musical instrument structure is incomplete and she can't make a sound.

The male cicada keeps singing every day to lure the female cicada to mate. To the female cicada, the male cicada sounds like a wonderful music. After mating and fertilization, the female cicada pricks a row of small holes in the branches with a sword-shaped ovipositor and lays her eggs in the small holes. A few weeks later, both male and female cicadas died.

Why do male cicadas bark? It turns out that the two small disks on the cicada's stomach are called sound masks, and there is a transparent membrane inside the sound masks, called valves. At that time, people used loudspeakers to amplify their voices. The sound mask is equivalent to a cicada's megaphone, which shrinks back and forth to amplify the sound, making a sound of "knowledge-knowledge-knowledge-knowledge" and summoning the male cicada. The female cicada has no sound mask and sound lobe on her belly, so the female cicada has no sound mask and sound lobe.

The larvae hatch from the eggs and stay on the branches. Autumn wind blows them to the ground. As soon as they reach the ground, they immediately find soft soil to drill down to the edge of the roots and suck the sap of the roots for a living. At least two or three years, more than ten years, from larva to adult, you have to shed your skin five times, four of which are underground, and the last time you climb out of the soil and climb into a tree to shed the dry yellowish shell (this is the shell of cicada). It can be seen that cicada is an insect that can't see the light. Although they live for a long time, they rarely live in the sun and spend almost all their lives in the dark underground. I'm sorry.

Cicada has two pairs of membranous wings with very hard veins. When cicadas rest, their wings always cover their backs. Cicada rarely flies freely, and only flies from tree to tree when it is foraging or disturbed. Interestingly, cicadas can suck juice through straws and sing with musical instruments at the same time. Eating and singing do not interfere with each other. The chirping of cicadas can predict the weather. If the cicada chirps loudly in the treetops early, it will tell people that it is very hot today.

cicada

Knowing is virtuous. The ancients thought that cicada eating wind and drinking dew was a symbol of nobility, so the ancients often used cicada's nobility to express its noble character. "Tang Poetry" says: "Every time a cicada sings its voice, it respects its nature alone." Because cicadas live on high branches, eat wind and sleep outdoors, and don't eat fireworks, so their moral character belongs to lofty type. A political prisoner is listening to Luo's Cicada: "Who knows if he is still singing?" Li Shangyin's Cicada: I am pure in mind, so I long to live a pure life like you. Wang's Qi Tianle: "I am noble and I am in pain." Yu Shinan's Cicada: "It is not the autumn wind that makes you aloof." They all use cicadas as a metaphor for noble morality.

cicada

-Li Shangyin

The pure heart is hungry because of this, and you sing in vain all night.

Oh, this last broken breath, in the green indifferent trees! .

Yes, I am like a driftwood. I have made my garden full of weeds.

I thank you for your sincere advice and live a pure life like you.

The first two sentences are about cicada's singing, and the last four sentences are about cicada's silence: "among the green indifferent trees!" " , is really a chase after the soul. Five or six sentences are written as "clear" first, and then folded with "annoying you". Pharaoh's pen is high, and it is also a must in the middle and late stages. Records of summer vacation in Tang Dynasty

In hot summer, cicadas can bring fun, tranquility and coolness to people. The cadence of cicadas often reminds people of childhood scenes. In summer, after a thunderstorm, some round caves can be found on the ground around the roots. This is where cicadas were unearthed. If you are lucky, you can catch cicadas without shedding their shells.

Cicada belongs to the HOMOPTERA Cicadellidae, with about 2000 species known in the world, and only 200 species in China. They appear in different periods of nature. Scorpions are about 2 cm long and have a dark brown body. As the earliest singer on the stage, Zhedi has a long, sharp and continuous voice.

Cicada, also called cicada, cicada, is the biggest in this small family. It is about 4 cm long, dark and shiny, and its singing is rough and loud, like a tenor. However, their voices are a little harsh, and whenever cicadas are chirping at noon, it is quite disturbing to rest.

Cicada lives alone and is only distributed in mountainous areas. Its cry is always in a sad tone of "Woohoo … Wow", as if crying.

The cicada didn't sing until the summer solstice, and kept saying "squat, squat". As soon as the dog days arrive, it can't wait to say "squat" to people. Maybe this is well-meaning and tells people in advance that the dog days are coming to an end. Please be prepared for the cold weather.

Cicada, with a body length of about 2.5 cm and a light green head and chest, is also called cicada in late autumn. The cicadas began to sing in autumn, and their songs were the finale of this "cicada concert series". However, they are just a "zi zi" note, singing too monotonous, and the artistic level can hardly bear the heavy responsibility of the finale.

Cicada can sing because its abdomen has a pair of Sai Ren, which is composed of eardrum and tympanic membrane. When the vocal cord membrane in the membrane contracts, it will produce sound waves and make a loud sound. But don't forget that the buzz is only available to male cicadas, and female cicadas are "dumb".

Cicada is not completely abnormal. Generally, the life history is long, and one generation is completed in 2 ~ 3 years. The most famous species is American cicada 17, and there are three kinds of cicada 13, all of which are the birthday stars among insects. Cicada's lifestyle is very strange. In summer, cicadas die within a week after laying eggs, and the eggs hatch in about a month. After hatching, the nymph falls to the ground and digs a hole in the soil to live. In the soil, mouthparts suck the sap of tree roots for a living. They go through a long nymph period. After the mature larvae climb out of the cave, they slowly climb the trunk and then split from the head and chest. Soon, the adults crawled out of the cicada shell, and their wings were displayed and dried by the sun. The eclosion process takes about 1 ~ 3 hours. Adults fly to the crown of the jungle and use their sucking mouthparts to pierce the branches of trees to suck juice, which is harmful to trees and fruit trees. When adults are sexually mature, males begin to sing to attract females to mate. After mating, the male insect dies, and the female insect dies after laying eggs, thus completing its mission of reproducing.

Catching cicadas is different from catching other singing insects. Cicada has phototaxis. As night falls, as long as you light a fire under the trunk and knock on the trunk at the same time, cicadas will pounce on the fire. At this time, it will be very interesting to hurry up and take them alive.