First of all, swallows have been good friends of mankind since ancient times, and there are many ancient poems about swallows. For example, Du Fu, a poet in the Tang Dynasty, wrote: "The sun sets in the west, and the flowers are fragrant in the spring breeze, which is really beautiful. Mud melts and swallows fly, sand warms and mandarin ducks sleep. " These ancient poems all express people's love for swallows.
Secondly, swallows generally like to nest and raise their offspring under the eaves with good ventilation and lighting conditions and convenient foraging and flying. This shows that your house is good. Only when the above conditions are met can swallows build nests. Swallows will take soil and stick it into a nest with saliva. The nest is covered with soft weeds, feathers and so on. Swallows have strong navigation ability and memory ability. The next year, they will find their original nest. Swallows come to nest under the eaves to show that their house is good. At the same time, in rural areas, it is also considered that bird's nest under the eaves is a symbol of good luck and prosperity. According to the old man, this is a good sign. Therefore, rural people generally like swallows to nest under their own eaves, and adults will also warn children not to hurt swallows and destroy their nests. If there are swallows nesting at home, it is also very interesting to watch them grow up day by day.
Third, swallows are beneficial birds and good friends of farmers. Swallows mainly feed on insects such as mosquitoes and flies. According to relevant data, a swallow can prey on more than 500 thousand kinds of pests in a summer, protect crops from pests and reduce the intrusion of mosquitoes and flies on people.