What natural phenomena occur before it rains?

The natural phenomena before rain are:

1. Sky: The air humidity increases, the air pressure decreases, the sky becomes dark, dark clouds cover, and sometimes thunder, lightning, and wind occur. phenomenon. 1. Ants will move ---- Ants dig holes in the ground to live. If it rains, the holes will be flooded by rainwater, so they will escape before it rains.

2. Flying insects fly low----Generally, before rain comes, the air humidity will be very high and the air pressure will decrease. The moisture in the air will condense on their wings, and the insect wings will become It's heavy, so it can't fly high before it rains.

3. Swallows fly low--There is a folk saying that "when swallows fly low, it will rain." This is because flying insects in the air cannot fly high, and swallows want to eat flying insects, so they also fly low. In addition, some small bugs in the soil also crawl out of the soil, and swallows will fly low to catch the reptiles. The dragonfly, like the swallow, will rain if it flies low. 4. Small fish will float to the surface to breathe - the air pressure at the bottom of the water is low and less oxygen is dissolved, so the small fish will float to the surface to breathe.

5. Snake aisle - most snakes hide in caves during the day and go out for food, drinking, bathing, shedding and other activities at night. But when the weather is particularly humid and hot, it will also force people to leave the cave. Therefore, when a snake comes out of its hole during the day, it is a sign of rain, which is the verification of "when a big snake comes out of its hole, it rains heavily" and "when a snake crosses the aisle, it rains".

6. Chickens are reluctant to enter the chicken coop. Chickens do not have sweat glands and sebaceous glands. Due to their lack of heat dissipation ability, chickens are very afraid of heat. Before the rain, the chicken coop was even more stuffy, so the chickens were found reluctant to enter the coop. This was a sign that a thunderstorm was coming.

7. Earthworms coming out of their holes——When the ground is moist and soft, earthworms will crawl out of the ground, which is a sign that it will rain.

8 The clear weather turns to cloudy, but the cicada stops chirping. The cicada’s chirping is caused by the vibration of the membrane of its abdominal vocal organ. In summer, cicadas start chirping about 2 hours before the rain turns to rain, but when sunny days turn to cloudy days, cicadas stop chirping.

9. Dogs soak in water - because dogs do not have sweat glands, they cannot rely on pores to dissipate heat in hot summer. They can only maintain a constant temperature by opening their mouths and pulling their tongues to dissipate heat. When a dog feels very hot, he jumps into a pond or stream to soak in water to help dissipate heat. Therefore, if you find a dog soaking in water, it indicates that it will rain.