Do cicadas only have seven days to live, and why do cicadas only live seven days?

After climbing out of the ground, cicadas can actually survive on the surface for about a month. The larvae of the cicada spend most of their time underground, the life cycle of the French cicada.

Mostly 4 years, while North America.

But there are cicadas that live up to 17 years. Most of the Chinese cicadas live for 3 to 7 years, nearly half of them are 5 years, and a few can survive 8 to 9 years. Biologists generally agree that cicadas are the longest-lived insects in the world.

The cicada's life is spent like this: the conceived female cicada uses the ovipositor on her tail to punch holes in the branches and pierce the xylem.

Directly to the heart of the medulla, each orifice lays several eggs, there are dozens of orifices, and the total number of eggs is generally 300 to 400, up to 600. Like other weak creatures in nature, most of them do not survive adulthood. After the eggs hatch on their own, the larvae burrow into small holes, molt for the first time on the branches, and after a few hours, the epidermis keratinizes and hardens, falls to the ground, digs into the soil with its front paws, burrows into the mud, and spends its long years in the dark, surviving on the sap from the roots.

Cicada larvae spend most of their time underground, and when the summer sun shines brightly and the weather is warm, the young cicadas break through the soil and climb the branches.

Grow up. And out of the ground, the cicada on the branch will find a suitable position, and then complete the most important deformation in life, the shell slowly cracks, the new body drills out of the shell, this process will last for several hours, at this time the cicada's wings are very soft, the body is also very weak, at this time the most vulnerable to the attack of natural enemies, so the vast majority of cicadas will choose to demute at night, and by the next morning they can move and fly normally. The vast majority of adult cicadas that regain sight after molting survive within half a month, the shortest is only a pitiful 3 days, and the longest is a black grasshopper.

Adults only survive for 45 to 60 days in sunlight.

Cicadas do not have a saying that they can only live for seven days. The longest three lifespans of cicadas are about 60 to 70 days, which is still relatively long. The life cycle of French cicadas is mostly 4 years, while in North America it is 3 to 7 years, nearly half of which are 5 years, and a few spend 8 to 9 years.

Biologists generally agree that cicadas are the longest-lived insects in the world. After the cicada climbs from the ground to the tree to form a flying adult, it dies after completing the mating process with the opposite sex and reproducing offspring.

The habits of cicadasThe larvae of cicadas live in the soil, sucking the sap of plant roots, weakening the tree, causing the branches to die, and affecting the growth of the tree. The larvae of grasshoppers live in the soil all their lives. When it is about to be feathered, it burrows out of the ground surface at dusk and at night, climbs the cicada on the tree, and then grabs the bark of the tree to molt and feather.

Cicadas are mostly found in the tropics, inhabiting deserts, grasslands and forests. In addition to the species of the genera such as the three-dog cicada and the moth cicada that appear in midsummer every year, there are also periodic cicadas. The most well-known periodic cicadas are the 17-year-old cicada and the 13-year-old cicada.

Why do cicadas only live for seven days?

1.The main task of the adult stage.

Many people know that cicada larvae live for many years in soil-sensitive soil, while adults only have a short lifespan. This is because the main task of cicadas in the adult stage is to reproduce offspring rather than to find food or perform other survival activities. As a result, they do not have long-term physical reserves and resistance.

2.The life cycle of a cicada.

The life cycle of a cicada can be divided into three stages: egg, larvae, and adult. Cicadas only have a short lifespan in the adult stage.

In the larval stage, they can live underground for years, sucking on tree sap to get enough nutrients to sustain their lives. Once the larvae have finished developing, they burrow out of the ground and molt to become adults.

3.Stress to reproduce offspring.

During adulthood, cicadas need to find a suitable environment for mating and laying eggs. However, in a short period of seven days, cicadas need to complete the three stages of mating, laying eggs, and dying. The pressure to reproduce offspring makes it impossible for them to survive for long periods of time, and a lifespan of seven days is enough for this task.

4.Energy consumption.

Cicadas need a lot of energy to mate and lay eggs during the adult stage. During their short seven-day life cycle, they need to constantly fly, breathe, and expend energy. Since there are not enough reserves, these energies are quickly depleted, so they only have a short lifespan.

5.External environmental factors.

The lifespan of adult cicadas can also be affected by external environmental factors, such as changes in climate and food**. Cicadas of some species will live longer with the right climate and an adequate food supply, while in harsh environmental conditions, they may die earlier.

6.Provide food for other living beings.

While the short life cycle of cicadas can be difficult to understand, they provide an abundant source of food for other organisms to survive. The abundance of adult cicadas can provide food for many animals**, thus maintaining the balance of the ecosystem.

7.Human exploitation of cicadas.

In some places such as Japan and China, cicadas are used as food and medicinal herbs. The chirping of cicadas is also used by people as an expression of art and culture. Although cicadas only live for a short period of seven days, their ecological and cultural impact cannot be ignored.

8.Summary.

The main reason why cicadas only live for seven days is due to the stress of reproduction during the adult period, and at the same time the need to consume a lot of energy. Although their lifespan is short, they provide an important source of food for other organisms.

The lifespan of cicadas is about 14-60 days. At the end of June, the larvae of the cicadas begin to emerge into adults, and the newly fledged cicadas are green and have a maximum lifespan of about 60 days. In late July, the female adults begin to lay eggs, and the peak oviposition is in early and mid-August, and the eggs are mostly laid on branches with a thickness of 4 to 5 mm.

It is found in temperate and tropical regions, inhabiting deserts, grasslands and forests. In addition to the species of the genus Moth Cicada that appear in midsummer every year, there are also periodic cicadas in the limbs of the acre. The most famous periodic cicadas are the seventeen-year cicada and the thirteen-year-old cicada, also known as the prime cicada, because the life cycle is prime, so it will not encounter the natural enemies encountered in the previous generation.

Periodically, cicadas occur once in a certain area at certain intervals, when dozens to hundreds of black-brown cicada larvae emerge from the soil and emerge together, which is very spectacular. Some species are easier to identify by their vocalization, behavior, and morphology.

The cicada's life is spent in public for four years, and it dies after seven days, what do you want to say? First, to correct the subject's problem, the lifespan of the transformed cicada is more than 7 days. Female cicadas usually live again after mating and laying eggs.

Three or four days. If an unmated cicada or male cicada can live for more than a month.

In fact, the real public 4 years is the normal life of the cicada, and finally becoming a flying cicada is transforming to complete the task of passing on the ancestry. In fact, the life of the cicada is in the open life, breaking through the soil just to reproduce, it was originally in the open life for a few years, unearthed for a few days, the cicada will lay thousands of eggs on the tree, and then, the branch will gradually fall, fall into the air, all the larvae will grow in the soil. Before the shell is unearthed, many become a delicacy on people's tables, before the shell, they will grow lonely and lonely in the dark soil, and the reason why they choose to shed their shells on the tree is because the wings can grow healthy, and the enemies on the tree will not disturb them, in fact, humans are their biggest natural enemies.

Cicadas spend most of their lives in public, usually staying in the soil for a few years or even more than ten years, absorbing the sap from the roots of the tree, gradually growing, waiting quietly, just for the bright world outside. The burrowing time of the common Chinese cicada is 3-7 years, and the life cycle of the French cicada.

Mostly 4 years old, but there is a type of cicada in North America. Its larvae lay dormant in the soil for seventeen years before breaking out. Cicada chrysalis.

After drilling out of the dirt, climb up the tree and hold on to the bark. The molting process begins when a crack appears on its back, with its head coming out first, followed by a green body and folded wings. The whole process takes an hour.

The transformation of the cicada pupae is completed overnight, and after laying the eggs, the adult worms will die, and the eggs will begin to hatch and enter the next life cycle.

After growing up in a lonely environment for several years, the cicada can finally climb the branches of the tree to shed its shell and be reborn, and have a good look at this colorful world. But the good times are short-lived, and in a few weeks its life will be over, and it will be completely separated from this world.

The purpose of the cicada's existence is to reproduce offspring. But although it only exists for such a short time, it is also responding positively, so its meaning also tells us that no matter whether life is short or not, we must face it positively and live well, life is not about the length of life, but about living a positive and meaningful life.

Maintain ecological balance and maintain a balanced food chain. And cicadas are a traditional Chinese medicine, cicadas are highly nutritious and multiply in large numbers in many parts of China.

We spend a lot of time studying, working, and the happy moments are too short compared to a lifetime.

But we live for these fleeting moments, chewing these precious memories over and over again in the seemingly endless darkness until the next happiness comes.

In fact, after the cicada climbs from the ground to the tree to form a flying adult, it does not die after 7 days, but can survive for about 1 to 2 months, and will die after completing the mating process and reproduction with the opposite sex.

When the cicada is still a larva, it will live in the soil for 2 to 3 years, some for about 5 or 6 years, and some for more than ten years. Living in the soil is mainly to protect themselves from natural predators such as birds and rats in nature, and during the dark time in the soil for many years, the larvae of the cicadas will feed on the sap in the roots of the tree and gradually grow up, and when it comes to the next step of development, they will emerge from the soil, and their image is what people call the monkey. Knowing that monkeys are a delicacy for both birds and humans, the cicadas chose the night when the birds were asleep when they were unearthed, so they avoided the natural enemies of birds, but they could not escape the poisonous hands of humans.

Gluttonous people use flashlights at night to look for monkeys everywhere under the branches of trees, in order to satisfy their appetites.

If the cicada is lucky enough to escape the poisonous hands of birds and humans, the monkey will climb to the branch of the tree to shed the golden cicada's shell, that is, to break a hole in its back, and then slowly crawl out of the hole on its back. After learning that the adults crawled out, they were very weak at first and did not move much, but after a few hours, their bodies adapted, their wings became stiffer, and they were able to fly before dawn. After dawn, people can only find that there is an extra Zhihusk on the tree, which is a kind of Chinese medicinal material, and people pick it up and collect it, and sell it to pharmacies after more, which is also regarded as an extra income.

The offspring know that there is a month of survival after the progeny, during which the male cicada will chirp desperately, the female cicada will come to mate with the male cicada after hearing it, and after the mating is completed, the male cicada will look for other females until finally die. The female cicada chooses the most tender branch, punches holes in it, lays her eggs in it, and waits for death.

Because this is a characteristic of cicadas, they spend most of their time underground, crawling out of the ground only when they are breeding and dying after 7 days.

This is something that they have formed in an endless evolution, which is determined by their genes. The reason why they crawled out and died seven days ago was because they could survive better and hide from predators.

In fact, the cicada did not die, but it just turned into a butterfly and survived in another state, and its life continued.