A small globe, with a few flies hitting a wall. Buzzing, a few mournful, a few sobs. The ant edge is exaggerated, and the grasshopper shakes the tree.
The affection for flies stems from Chairman Mao's poem --- Man Jiang Hong
The flying champion fly in reality is also very magical, killing and loving humans for countless years
First, the life of a fly
The life course of a fly is calculated in days, its egg stage is about 1 day, the larval stage is 3 to 6 days, the pupal stage is 3 to 7 days, and it takes only 7 to 14 days from egg development to adult. Within a few days to a dozen days, the granular eggs grow into flies.
Adults begin to move and eat 2 to 24 hours after molting and feathering. Flies can only mate normally to lay eggs after feeding.
Second, the type of fly
The fly is a dipterae, and its life history can be divided into five stages: eggs, larvae, pre-pupae, pupae, and adult insects.
Although the lifespan of a fly is only 1 month, a female fly can give birth to 500-1000 in a lifetime.
From a global perspective, there are more than 4200 species of flies, and 500 species can be found in China.
Here we introduce several common flies.
1 housefly
Houseflies are the most common fly species in Our country. It accounts for about 90% of human habitation and is one of the most widely distributed insects in the world. Because they transmit diseases, they are considered pests. Houseflies are estimated to have evolved in the Cenozoic 65 million years ago.
Houseflies have only one pair of wings, and the hindwings have degenerated into tiny balance bars to help stabilize flight. The midrib of the wing suddenly bends upwards.
Houseflies can only eat liquid foods. They spit on solid food for initial digestion and then suck it in. They also spit out partially digested food and suck it back into their abdomen.
One of our most annoying objects of summer.
2 City flies
City fly, a type of fly, is a member of the housefly, slightly smaller than the housefly, slightly lighter in color, and about 5-6 mm long. It is second only to the housefly in the genus Houseflies.
City flies mainly breed in garbage, semi-dry and wet human manure, pig manure, triguanato and legume residues.
3 large-headed golden fly
The big-headed golden fly is an insect of the subfamily Voltopodidae in the family Lisa. The adult body is about 10 mm long, metallic green, and the powder is gray.
It mainly breeds in rare human dung, animal carcasses, etc.
4 Chinese green fly
The Chinese green fly is an insect in the genus Green fly in the family Dipterae. Endemic to China.
5 Hemp flies
Most species of flies lay maggots on carrion, feces or decaying substances, a few species lay maggots on mammalian wounds, and some species lay maggots on other insects, becoming parasites for these insects.
When you see these pictures, do you have the urge to shoot them to death?
Third, the contribution of flies to the world
Contribution to research: People walk on ice and often wrestle. And the fly falls on the vertical glass surface, not only will not slip down, but also can crawl freely on the vertical glass, what is the reason? At present, there are already scientific research institutions to conduct special research on this, so as to develop new scientific and technological products suitable for high-altitude work.
Contribution to medical research: Many bacteria infected by the body of flies, mainly hiding in the digestive tract. Most of these bacteria are harmful to people, such as typhoid bacillus, dysentery bacillus and other pathogens, but they are not harmful to flies themselves! Medical experts have been conducting studies and experiments for a long time, studying the unique function of flies in a healthy life surrounded by bacteria.
It's a link in the ecosystem's food chain: many species depend on flies to survive. This is why no matter how fast flies reproduce, they will never occupy the earth. Dragonflies, beetles, mites, spiders, wasps, many birds, etc., are natural enemies of flies. In addition to animals, plants also eat flies, such as flytraps, nepenthes and so on. If there are no flies on the earth, the food chain will break, biodiversity will be reduced, and the destruction of the ecological balance of the earth will be followed. Because the food chain in the ecosystem is interlinked and interdependent. Now, people slowly like to eat flies. What species, when humans like to eat and use, may not be far from "endangered".
Pollination: Ever since there were flowers on Earth, there have been flies. Most people know the hard work of butterflies, bees, etc., but few people know that some flies also visit flowers and suck nectar in nature; tirelessly pollinate flowering plants (including grains, fruits and vegetables that humans eat). For example, in the southern part of Taiwan, the "big-headed golden fly" bears the burden of spreading pollen, otherwise, the mango will have poor fruiting, yield and quality will be much lower. It is precisely because of the participation and dedication of some members of nature, such as flies, that nature will be so vibrant and colorful.
Or the guardian of the environment: nature produces countless feces or corpses every day, and flies are involved in the heavy responsibility of decomposing these feces or corpses, in our human language, flies should be the glorious cleaners in nature. Thirty years ago, the Soviet Union developed a special housefly for astronauts who lived and worked on the space station for a long time to break down astronauts' feces. Later, Japan introduced this technology, and after years of research and experimentation, it was finally successfully used to process livestock manure such as chickens, cattle, pigs, etc., and it can also be used to make feed and compost. If this technology can be maturely applied, it will of course have a positive significance for the construction and promotion of ecological agriculture. In recent years, scientists have used the sensitivity of flies to pesticides, that is, the degree of death after contact with vegetables to judge the toxicity of vegetable foods; some people have used flies to measure the poison of newly renovated rooms, and found that in the new house with high concentration of harmful gases, only lived for 25 days, and the average life of 800 fruit flies was shortened by more than half
What is the relationship between flies and humans, and what is its role?
1, fly maggots are rich in nutrients, fresh maggots are containing protein up to 18, 6%, fat 5%, as well as vitamin B2, carotene and so on.
2. Fly maggots contain eight trace elements, such as potassium, calcium, magnesium, copper, zinc, manganese and so on.
3. Fly maggot powder contains eighteen kinds of essential amino acids, which can extract protein powder and develop advanced nutritional foods, beverages and aerospace green foods.
4, fly maggot epidermis can extract chitin, chitosan, it has compatibility with the human body, anti-inflammatory, bacteriological, hemostasis and other functions, can be made into artificial skin, sutures, wound healing does not have to remove stitches, natural integration into the human body 5, scientists summarize fly maggot protein and chitin, shell polyfly flies to bring many harms to human beings. However, it also has the potential to bring many benefits to humanity.
What is the secret of flies going in and out of dirty places, in the midst of countless germs, but not getting sick because of them?
Scientists have conducted in-depth exploration of the flies' own defense function, and the results show that there is an antibacterial protein in the flies that can resist the invasion of pathogens; if this antibacterial protein can be extracted from flies in large quantities, humans will enter an antibacterial world.
Recently, scientists have conducted more in-depth research on flies, and found that the protein and fat content of flies is very high, accounting for about 40% of protein, 10% of fat-------- 15%; the protein and fat of maggots in their larvae account for 51.3% and 15% respectively, and the content of trace elements such as calcium, magnesium and phosphorus in maggots is also very rich. Some people have calculated that if a fly breeding farm were to be established, 890,000 pounds of fly pupae could be harvested per acre of land per year, and about 40,000 pounds of delicious pure protein and fat foods could be processed.
Fourth, why do you always fail to hit the flies
Every time you hit a fly, you find that it moves faster than you? How do they do it?
Could it be mind-reading?
The answer is that the world in the eyes of flies is made up of slow motion
If you look at the clock, what you see as a human being is that the second hand is spinning at a constant speed. But in the eyes of the turtle, the second hand is twice as fast as the original speed.
In the eyes of flies, the second hand ticks four times slower with each tick. In fact, the length of time depends on the species.
The speed at which images are seen from the eye and then transmitted to the brain is different for each species. Humans flash an average of 60 times per second, turtles 15 times, and flies up to 250 times.
The speed at which the brain receives images is called the "flash fusion frequency," and in general, the smaller the species, the higher the critical frequency of flash fusion.
For more fantastic information about flies, stay tuned to --- Flies, insects around you who love and kill each other