Officials from the local agricultural bureau responded that Mayflies flood every year, because they fly to the shore to find a mate during the breeding season of Mayflies, especially near rivers and lakes. This number of Mayflies is also very common in the local area, and a large number of Mayflies appear every year. 2022 is not particularly serious, this is a normal natural phenomenon. During the breeding season, Mayflies seem to be in great numbers. They have little influence on human beings. They don't do anything that damages crops. Because the feeding organs of these adult Mayflies have degenerated, they no longer eat anything. They spend almost all their time and energy on breeding and mating. Such a large number of ephemera also brings certain risks. Mayflies don't attack humans or bite people, but they dance around street lamps in groups and fly around in front of headlights, which easily blocks the light and reduces visibility. In addition, there are too many groups of Mayflies, and the time of death is very concentrated.
Mayflies are very small insects. Mayflies are about 3 mm long and adults are about 2 cm long. In addition, its body is very thin, and it is almost difficult for the naked eye to find the ephemera. Mayflies are an important part of the ecological chain. They are highly sensitive to water pollution, such as eutrophication, acidification, harmful algal blooms and pesticides. Therefore, if water is polluted, they will not appear. Mayfly adults do not eat crops and are harmless to crops, while mayfly larvae and adults are food sources for fish and frogs. A large number of ephemera is a sign of good water quality around.
Mayflies look very small and fragile, but they also belong to an ancient species, which appeared more than 300 million years ago because they rely on genes to reproduce. During the breeding period, the adults of the Mayfly do not drink water, and the only concern of the Mayfly is to find a mate, mate and so on.