Why do many animals predict the weather and how do they perceive it?

Why do many animals predict the weather and how do they perceive it?

In winter, if you see spiders speed up their web weaving, or similar, ants build higher and higher nests, you should prepare down jackets, because it may be very cold this winter! Why do spiders spin webs abnormally? How did it know that a cold wave was coming? In fact, spiders, like snakes, are cold-blooded animals. As the temperature changes, the temperature of their bodies will also change. However, there is another key point. For example, if the temperature is as low as-18 degrees to 15 degrees, spiders can't stand it, and they may freeze to death. Therefore, spiders often speed up their web-building before the temperature drops sharply, and some spiders have to make a cocoon for themselves to keep out the cold. In addition, the spider has a spinneret at its tail. This spinneret is sticky and cold, and it is particularly sensitive to the changes of air temperature and humidity. So spiders can not only feel the temperature change, but also determine the humidity change in the air. If it rains, the humidity in the air will increase, and the spider's spinneret will become very wet, which is not conducive to its web. If you see that spiders don't have abnormal webs, you can judge, oh, it may rain!

Speaking of weather forecast, frogs and loaches must also have names! Frogs and loaches are the best professional barometers. In the rainy season, especially in summer, frogs can often be seen croaking on the lotus leaves, and sometimes they even jump to the roadside for concerts. Usually when frogs can't croak, it's always when the weather is dry, or when it doesn't rain for a short time, and where can the frog's delicate skin stand the wind and the sun? After all, there is no sunscreen suitable for them ... so they stay in the water and occasionally show their noses to breathe, and then they stop barking at all. However, if the air humidity is high and there is no sunshine, can't frogs go out for a walk and ask for someone? They jumped on the lotus leaves in twos and threes, jumped on the roadside, jumped into the fields and began to sing loudly.

Not only frogs but also earthworms can predict sunny and rainy days! Although the earthworm looks fleshy and stupid, it is an expert in humidity control. Earthworms generally live underground and are standard fat houses! They can live well on the roots of some underground plants, fallen leaves, rotten garbage and so on. They have low requirements for life and are easy to meet. They can stay indoors. However, if the humidity in the air increases, or in other words, when it is going to rain, it can't breathe underground, just arch and arch quickly and drill out of the ground. So when you see a lot of earthworms coming out of the soil, you don't even need to look at earthworms. Just see some loose soil and small holes in the garden of the community, which means it's going to rain soon.

Cattle and sheep. In the 1990s, there was a special competition in America. The Houston Meteorological Bureau, which has modern equipment such as meteorological satellites, radars and computers, held a weather forecast competition with a cattle farm that only owns cattle. As a result, the cattle farm won, 39 to 6 1. Cows and sheep are often compared. Cows can predict the weather, and sheep are no exception. Newton, a great scientist, once heard a shepherd say that it was going to rain. He was skeptical because it was unusually sunny. But within half an hour, it really rained heavily. Newton was surprised and asked for advice. Shepherds say that sheep are "hygrometers". If it likes to lie under the eaves, it will rain. If the sheep jump on the grass, it will be sunny.