Flies not only rub their faces with their front legs, but also rub their feet. This habit is actually the same as instinct. For example, cats often wash their faces with their paws, and cats wash them carefully. Flies do similar things, but they bring more functions.

First of all, it is natural for the sake of cleanliness. Its leg structure is easy to be attached with food residue, excrement and other garbage, and the residue left behind will increase the weight of flies and increase flight resistance. If we look closely, we will find that there are burrs on the limbs of flies. Flies need to stay on all kinds of things constantly, and there are many residues in natural contact. If not disposed of, they will consume a lot of physical strength in the next flight.

Secondly, flies rely on their body senses and bristles on their legs to perceive the world around them. Once deceived, they will lose their direction and even find food next time. Flies should not only wipe their feet, but also wipe their whole body all the time, which helps to perceive the taste of new food, to be precise, to keep their sense of touch sensitive.

Finally, scientists found that whenever flies rub their feet quickly, they are likely to summon their partners to breed. After increasing the frequency of foot wiping, female flies can release unique pheromones to attract male flies. This mainly applies to women, and it is likely to be an extra effect.

How long can a fly without a head live?

Although the IQ of the flies we see is not high, they will never deliberately take off their heads as toys to play with. The reason why they show such exaggeration is unintentional, or they are used to rubbing their feet. I didn't expect to grasp the strength and rub their heads at the moment.

At that time, the fly didn't realize that his forelimbs were holding his head, so he deliberately played for a while and didn't throw it away until he got bored. After seeing the action of the fly, we will find that the fly is not dead, and there is no blood flowing out. Don't flies need heads? This is not the case!

This kind of immortal practice will not kill a fly immediately. Insects are different from mammals, which will die immediately without their heads. Because the brain and respiratory organs are concentrated in the head, the head is more important than all organs in the whole body, but insects are different.