What are the natural phenomena before the thunderstorm?

1, ants move: because ants are the animals closest to the ground, they have the ability to feel the rain. Generally, ants can know whether it has rained recently by changing the humidity in the air. Then move the nest from low to high. The ants were very busy before it rained. It is worth noting that ants don't always move because of rain, but they also move when they are in groups.

2. Swallows fly low: Swallows feed on small insects. Before it rains, the air pressure is low and the air humidity is high. The wings of insects become very heavy, because they can't fly very high because of humidity. Swallows have to fly very low to catch them. Therefore, there is a folk saying that "the swallow flies low and it will rain".

3, small fish breathable: the fish in the pond suddenly floated to the surface of the water, as if inhaling in a big mouth. This means that it is going to rain. The reason is that fish need to absorb oxygen from the water, and when it rains, the air pressure is low, and the amount of air in the water decreases. The fish can't stand it, so they float.

4, puppy breathing: before it rains, the dog will shrink into a ball on the haystack and use its mouth as a heater.

5. Toads come out of the hole: because the skin is brittle, I am afraid of dryness. So in general, you can only see toads croaking at night. If it rains, they will go out to play in caves.

6. Earthworms on the road: Small earthworms live in wet places. If earthworms can come out to move, it means that the air is already wet. Pay attention to the rain at this time.

7, chickens do not enter the nest: chickens are afraid of heat because there are no sweat glands, especially before it rains in summer. If the chickens are driven into the nest, they will stay in a cool place all the time, which means it will rain heavily soon.

8. Frog: On the eve of rain, the air humidity increases, and the frog's sensitive skin will feel it immediately. Perhaps for fun, on the eve of rain, frogs will keep chirping, and the volume is higher than usual. Before the weather turned to rain, the humidity in the air was high, the frog's skin was moist, the frog croaked little and the frequency was low. When the storm comes, we can't hear frogs. But on sunny days, frogs will bark loudly. ?

9. Crows fly in groups, and the cold wave is coming: because crows are black feathers, they are very uncomfortable in hot weather and will fly in groups. This phenomenon often occurs before the cold wave comes.

10, pigs embrace grass, and the cold wave is coming: there is a folk saying that "dogs are afraid of cold navel and pigs are afraid of cold mouth", so when there is a cold wave in the sky, pigs will embrace straw mats to keep out the cold. This shows that pigs are very sensitive to climate change.