Swallowing birds, low flying sad birds signal rain

Sometimes we see flying urchins so low, even low, that it is close to the ground; sometimes we see a lot of dragonflies gathering into a group that only flies a few meters above the ground.

Low flying dragonflies signal the coming of rain (Photo: Research) These unusual phenomena signal a rain begins. Normally, swallows or dragonflies fly around to catch food bugs. But when it is about to rain, the steam in the air will increase, the wings of the worms are wetted and their bodies become heavy, unable to fly high, this time the bird or dragonfly has only way Fly really low to catch prey.

In nature, there are still many phenomena that can predict the coming of rain. For example: The surface of the brick floor, stone pillar, jars, even the painted houseware suddenly becomes wet, or the surface emerges from the steaming layer of water, all phenomena that all signaled that the sky was going to rain in a few hours. Because the temperature on the surface of these items is relatively low, the water vapor in the air that just touches them can condense into speckled water particles.

In fact, people are also very sensitive when it is going to rain. Try to touch your hair immediately: it will be dry in the sun, and when it is dark, your hair will become wet.