Have you ever wondered why flies are more active during the day than at night, and more annoying in the summer than in the winter? Let me answer for you whether the flies go to sleep at night.
Flies are insects that are active frequently during the day and have obvious phototropism. At night, it perchs still. Activities and habitats depend on fly species, season, temperature and region. In some seasons, stable rot flies, summer side flies, and city flies also invade the house. The big-headed golden fly, the mercerized green fly, the fly, the volley fly, the hemp fly, etc. are mainly active and inhabit the outdoors. Flies are suitable for dirty and not too clean places. In the countryside, there are more, this is not aimed at anything, it is personal experience. I come from the countryside. When we feel something fragrant, the fly feels very disgusting.
The activity of flies is greatly affected by temperature. It can only crawl at 4 to 7 °C, so it is very comfortable in winter and does not have to worry about flies to disturb it. It can fly at 10 to 15 °C, can only eat, mate and lay eggs above 20 °C, is especially active at 30 to 35 °C, stops being active due to overheating at 35 to 40 °C, and dies at 45 to 47 °C.
The way flies overwinter is quite complex. It can overwinter in a pupae state, as well as in the form of fly maggots and adults. In the northern cold and temperate regions, there are no active houseflies in nature, but there are still adult flies in the artificially heated indoors, and the greenhouse greenhouse often becomes the birthplace of a large number of flies in the warm spring of the following year. In Jiangnan and parts of northern China, where the average winter temperature is below 0°C, flies can subtly overwinter in a pupal state, and a few areas can also find dormant female flies and maggots covered with livestock and poultry manure. In tropical South Asia, where the average temperature is above 5°C, flies do not have a dormant state and can continue to breed.
Flies, like humans, go through a whole day's toil and sleep at night. Every day before sunset, the flies will find a safe place for themselves to sleep in. Under the leaves, under the branches, in the grass, under the stones, these are the favorite resting places for flies, because these places can protect them from the wind and rain, shade from the cold. Because you have to stay upside down when you sleep, the flies need to have a strong grip. If you sleep on the ground, you will be reduced to a plate of hungry birds, marsupials (such as kangaroos and koalas) and frogs. In addition, flies will also find a shade to take a nap on a hot afternoon. Staying under the sun for too long, they will be thirsty and their body temperature will rise. The mosquito, who is also a cousin, works the night shift. Mosquitoes are talking about the next issue.
Flies also love beauty The delicate biological clock allows us to wake up at basically the same time every day, and at sunset, the human eye produces two sleepy proteins - TIM and PER, which can send sleep signals to the brain. And in the morning, when the sun rises and the sun shines on the eyes, it will destroy these two proteins, and people will wake up. This protein is also found in the eyes of flies and other daytime active animals. But night owls like mosquitoes, their circadian rhythms are diametrically opposite. So, do you know the effects of playing with your phone after turning off the lights at night? Because the blue light emitted by the electronic screen can prevent the tim and PER proteins from transmitting sleep signals to the brain. This principle also applies to flies. Bright lights will keep flies trapped indoors awake.
Why there are more flies in summer than in winter. This is because flies, like other insects, are warmer animals, their body temperature changes with changes in the environment, and they do not have the ability to keep themselves warm. Flies are particularly active on hot summer days and "buzz" all day long. In winter, the cold weather prevents adult flies from moving and eventually freezes to death. At the same time, the larvae remain in the cocoon or pupa stage, and when the earth returns to spring, it will break out of the cocoon and become an adult fly. At that time, the flowers also bloomed one after another, and the sweet nectar would provide nutrients for the newly grown adult flies. Flies also do not eat and drink in vain, they will carry the pollen stuck to the body to various places, helping the flowers to pollinate.
Flies have a great connection with chocolate, can you believe it? The plant cacao that makes chocolate, currently only one known pollinator, is an inconspicuous little fly. About as small as a pin! So, if you go to the park again in the summer, you can observe whether there are snoozing flies under the fallen leaves, and let them taste the feeling of being disturbed by dreams.