Composition Meteorologist Swallow

People often can't tell when it is spring and when it is autumn. Don't worry, the convenient messenger-Swallow can always tell the news on time.

Every spring and March, when the willows sprout and the peach trees bloom with red flowers, the convenient messenger-the swallow returns to the north.

Swallow has a pair of wings, its back is black, its belly is white, and its tail is forked like scissors.

Swallows like to nest under the eaves or beams of other people's houses. For other floors, the lower clay turned up in the field or mud pellet excrement excreted by earthworms is selected as the building material, the clay or excrement is wetted with saliva and some grass clippings are added to build it layer by layer, and then soft grass and soft fluff are placed in the nest like half a tea bowl, thus a warm and comfortable home is built.

Although swallows have comfortable homes, they never covet comfort and are always informing human beings.

Every autumn, regardless of wind and rain, swallows always migrate to the south on time; In spring, no matter how beautiful and charming the scenery in the south is, they will always return to the north with the spring breeze. They always bring people accurate information.

In order to inform people, the newborn swallow began to learn to fly. By the time we set out in autumn, although we already had the ability to fly, most of the swallows lost their lives in the dangerous environment on the way. However, some lucky swallows flew over the waters of Qian Shan and reached their long-awaited destination, risking their lives to bring people the message that autumn is coming.

What if people are worried that they can't see swallows at home?

Don't worry, when the swallows come back in spring, they will always look for their old homes, as if they have deep feelings for everything there. As Zhou Bangyan said in Hidden Water Dragon, "It is designed for the return of swallows to their nests".

So people don't have to worry. They can't see swallows at home and tell them.

Swallows feed on pests. As long as their keen eyes find pests, they will flap their long wings and rush like arrows, open their short and wide triangular mouths and eat them.

Swallows eat tens of thousands of pests a year.

Generally speaking, the convenience messenger, the swallow, has made great contributions to mankind. So we should cherish them.