Are swallows all over the wires a precursor to an earthquake?
Swallows are seasonal migrants. Before the season gets cold, it flies to the warm zone in the south. In the north, the temperature rises gradually, and swallows set foot on their way home to nest, breed, lay eggs and hatch in the north. When nesting, swallows often haunt the humid air or the river, and the mud is mixed with saliva to nest. Haiyan is mostly built in sheltered places such as eaves, laying 3-7 eggs, usually only 3-4. If there are too many eggs, the chances of young birds hatching and growing smoothly are relatively low.
Occasionally, a young bird falls from the nest. Although it may not be fatal, the swallow can't get it back into the nest, and the price is the death of the young bird. Due to seasonal migration, swallows can also remember the location of their nests. If they don't die next year, they will return to the corresponding places to lay eggs and hatch. Young birds can also remember the environment where they grew up, and will form a family to return to their birthplace in the second year, repeating the behavior of generations, but will nest in another place. The so-called "Lao Wang Xie Yan flies into the homes of ordinary people"
Swallows like to wander in the sky in order to catch insects in the air, many of which are harmful to humans or crops, such as blood-sucking mosquitoes and annoying flies, so swallows are called beneficial birds. The behavior of swallows preying on insects is also affected by the weather. Generally speaking, before the rain comes, the atmospheric humidity rises, which will make the wings of insects wet, which is not conducive to flying, and sometimes it will be accompanied by the increase of wind power. At this time, insects tend to fly close to the ground, and the wind is less blocked by trees and buildings near the ground, so insects fly close to the ground, and swallows like to fly close to the ground to hunt.
Seeing this situation also means that it may rain in the near future, which, like ants' moving behavior, can be used as a sign of rain. With the growth of young birds, especially after young birds have the ability to fly and prey on their own, swallows will go out for food in families, and when they are tired, they will stop at places such as wires, so they will gather more and more, and clustering can also reduce the chance of being invaded by natural enemies.
Legend has it that swallows gather on the wire in front of their house or on the roof, indicating that the family is blessed. People in history don't think this behavior of swallows has anything to do with the earthquake. This phenomenon is very common. If it is a sign of an earthquake, I don't know how many times it has been plowed by an earthquake in the temperate zone of our country. In fact, most of the abnormal behaviors of animals (excluding the behavior of swallows) can't be related to earthquakes. Most people will only recall the abnormal animal behavior after the earthquake, but there are also many abnormal animal behaviors. The occasional earthquake after a few animals gather together shows that these behaviors of animals are not closely related to earthquakes, sometimes for foraging and sometimes for reproduction.
Modern people have many kinds of seismic wave measuring instruments, but they still cannot predict earthquakes. Judging earthquakes by abnormal or normal animal behavior will only add infinite troubles to yourself. Do people have to run to the playground every time animals change? In that case, people should not build houses, but sleep on the streets, because there are too many similar animal behaviors.