Is there a scientific basis for the rural proverb "Swallows fly low in the corridor and heavy rain is coming"?

Swallows fly low because there is a lot of water vapor in the air at the beginning of the rainstorm. When water vapor meets cold insects, it will condense into water, causing insects to gain weight and fly very low. Swallows eat insects, so they fly very low to catch insects. Snake aisle, before the rainstorm comes, snakes first perceive that they will climb to high places in order to avoid the rain flooding their nests or themselves, so there will be the phenomenon of snake aisle, both of which are phenomena when the rainstorm comes.

Swallows usually eat all kinds of small insects Before the rain, there was a lot of water vapor in the air, and the thin wings of insects were wet with water vapor, so they could not fly high and could only fly at low altitude. At the same time, small insects living in the soil also want to climb out for air. Insects on both sides should be concentrated together, and swallows can catch a lot of food by flying low or gliding quickly close to the ground. So at this time, people will say, "Swallows fly low, it's going to rain, and they have to go home to collect clothes."

Snake aisle refers to the response of snakes to weather changes in northern Jiangsu. The most sensitive snake is the water snake. It is found that before the weather changes, because of the low air pressure and high air humidity, the water snake can't stay in the hole any longer, so it will slowly climb out of the hole and cross the road to bask in the fish scales. At this time, if someone walks by or clap their hands, it will still stay on the road or slowly leave. At this time, everyone will judge: "It's going to rain, and we have to go home quickly."

For thousands of years, our ancestors have been living on the land, "facing the loess and facing the sky", and the land is another day for them. When technology is not very developed, observing the phenomena in nature and observing the actions of animals are their main sources of information. In the 2 1 century, with the development of the Internet, if you want to know what the weather is like, you can get accurate information through direct search.