Secondly, swallows are birds that are beneficial to crops. It likes to eat pests, so it can protect crops well where it is. Swallows usually fly out from morning till night for several days in search of available branches and soil. Build a nest bit by bit.
Meanwhile, swallows are the most affectionate birds. They are very loyal to their lovers. There is usually only one partner in life. And they are always inseparable. Build nests together and reproduce together.
It is precisely because people like them. Therefore, it has been circulated that poking a swallow's nest will blind the swallow, and the swallow can't fight or catch it.