What phenomenon indicates that it is going to rain?

Swallows fly very low because their important food is insects in the air. Because it's going to rain, the wings of insects feel the humidity of the air and fly very low. Swallows that prey on insects have to fly low, which is a clear sign of rain.

Phenomenon 2: goldfish floating

The goldfish suddenly floated to the surface from the bottom of the fish tank, as if inhaling deeply. 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.

Phenomenon 3: Toad comes out of the hole.

Toads are afraid of dryness because their skin is fragile. So in general, we only see toads croaking at night. If it's going to rain, toad will have activities if he feels the air is humid.

Phenomenon 4: Earthworms on the road

Earthworms live in wet places. If earthworms can come out to move, it means that the air is wet to a certain extent, and the wind and rain will definitely come within 24 hours.

Phenomenon 5: chickens don't enter the nest.

Chickens are afraid of heat because they have no sweat glands. It's usually sultry before it rains. At this time, even if you feel them go in, they will not move. Stay in a cool place. Especially in summer, if this happens, there will be thunderstorms in all likelihood.

Phenomenon 6: ants move.

Ants have the ability to feel rain, because they are the animals closest to the ground. Generally, ants can know whether it has rained recently by changing the humidity in the air. Then move the nest from low to high. Ants are very busy before it rains, so you can observe them if you are interested.