It can be said that the number of animals and plants in the world is very large, and China is also one of the countries where animals and plants are widely distributed, including some unique creatures, such as giant pandas. In most of these biological populations, there are also some species widely distributed around the world, such as cicadas. Cicadas are almost all over the world, and now more than 2,000 cicada species have been recorded by the scientific community. A kind of cicada is released in North America, which is very special. Besides North America, it is still on the earth. There is no footprint in this area, that is, "periodic cicada". They are called "periodic cicadas" because they do appear in a circular state and hide underground for a very accurate time. ?

Let's take a look at the following situation. Periodic cicada is a type of cicada that appears regularly in North America. This is mainly based on their life cycle. Of course, there are two periodic cicadas in North America. One is thirteen years. One is seventeen years, also known as seventeen-year cicada or thirteen-year cicada. They all lived underground when they were young, which means that they spent most of their time completely underground. Only at the end of their lives do they break through the "wet soil" and then enter the surface. What does it show on the surface? In fact, this is to prepare for the next life cycle. The most important thing is to climb the tree, molt, grow into an adult, and then mate and lay eggs in adulthood. This process only takes a few weeks. After spawning, it will return to the ground again to complete the next stage, and so on. Direct scientists have not found the breakthrough point of this creature. What's the reason? More research may be needed in the follow-up, but this periodic law is relatively clear. ?

American entomologists have been paying close attention to this matter, including New York, Georgia and other places. After the "periodic cicada" appears, the mating activity will last for about 4 weeks, and then small eggs will be laid on the branches, and all adult cicadas will die. After hatching, the small "periodic cicada" will fall to the ground and then enter the soil, with a life span of 17 years. Therefore, no one knows why these "periodic cicadas" stay underground for so long. As mentioned above, scientists have not found a pattern. Now, experts worry that the outbreak of billions of "periodic cicadas" may cause great changes in the ecosystem, because "periodic cicadas" have many predators, including birds and foxes. Waiting may be urgent, so be prepared. Although cicadas are harmless to humans, it may take a school year for other creatures to appear. This requires preparation in advance. ?

Of course, in summer, the "time cicada" is the same as the ordinary cicada, and it will make a louder sound, and an annoying environment will inevitably appear. The main reason is that sound pollution may be more obvious and often heard in rural areas. As for the name of cicada, it can be considered that it is a very widely distributed species. Of course, it has many types, so it is often seen. Therefore, in different areas, there may be cicadas who are used to eating, but most of them are used in cicadas as medicines. These are also some valuable cicadas discovered by scientists today. Generally speaking, they are not many. Overall, the United States will face the impact of billions of "periodic cicadas", which can be said to be very large. ?

Once all of them are collectively dispatched, it will definitely be densely populated. Of course, "periodic cicada" is enough. I haven't seen this research yet. I can only talk about American friends. Please note that sending "periodic cicadas" may bring other biological effects. Related food chain species are bound to appear and move around. Please note that some species are also aggressive. This is about the delivery of "periodic cicadas".