Why do flies keep rubbing their hands (feet) when they stop?
1. Keep your feet clean without affecting flight
Flies move around and are stained with many dirty substances. If these substances are not removed, they will increase the weight of the fly and affect its flight. After being stained with something, the suction cups on its hands and feet are adsorbed on the surface of the object when it lands, and it is not easy to walk quickly when it stops, so why do flies always rub their hands and feet.
2. Maintain taste sensitivity
Flies have taste receptors on their feet, that is to say, if we humans want to taste, we need to put food into our mouth, but flies can taste it by touching it with their feet. So when the fly stops, it will constantly touch it with its feet everywhere. After tasting the taste, it will rub it again. The purpose is to clean up the taste receptors, remove the old taste, and then touch it again to taste the new taste. No wonder the fly we see always walks around and rubs its feet when it stops. Unexpectedly, it is tasting everywhere!
Flies often stay in wet and dirty places, so they should rub their feet to keep clean, which is the same as the mantis will clean its catching feet with its mouth after eating. Another important reason is that the feet of flies are contaminated with food residues. If they are not cleaned, not only the taste organs will gradually fail, but also the flight will be affected.
Because flies have this bad habit, they can infect many germs. If flies stand in feces and sewage and fly to food, they will leave germs on food. In addition, the fly has a worse habit, that is, when it falls on the food, it not only eats the food, but also defecates, and arranges some living bacteria and parasite eggs in its intestines on the food. If people eat such food, they are easy to be infected with diseases, affect their health and even endanger their lives.