Text/Yo-Yo Kop said
The weather is warmer, everything is revived, but at the same time the nasty fly is also beginning to move, this fingernail-sized fly, have you ever looked closely, do you really understand it? Why do flies keep "rubbing their hands" when they stop? Obviously it stopped in front of you, why can't it be hit?
<h1 class="pgc-h-arrow-right" data-track="5" > flies rubbing hands</h1>
In fact, flies not only like to rub hands, they also like to rub their feet, rub their heads, rub their whole bodies, and when you see the picture of flies rubbing their hands, what picture comes to your mind? Is it the fly that rubbed his hands and said with an evil sneer: "Let you not look at the food, in a moment it will be mine."
Stop, the fly rubbing hands is not because of this, I believe that everyone has observed the fly when they were young, in fact, it has a total of 6 feet, each foot has claws, and there are dense fluffs on it, in fact, it is the "receptor" of the fly.
When the fly lands on the surface of the food, the villi on the claws will secrete a liquid, which is a neutral grease with a certain adhesion, in order to be able to stand more firmly on the food.
But this liquid also has disadvantages, that is, it is easier to let the claws stained with dust, food residues, etc., if not cleaned up in time, it will increase the weight of the flies, affecting the speed and sensitivity of flight, after all, the flies are so small, a little dust will also have a great impact on them. That's why we can see that flies keep rubbing their hands as soon as they stop.
In fact, the "hand" here is just the front foot of the fly, they not only rub the two front feet, sometimes rub the head, use the back foot to sweep the dust off the whole body to maintain their own cleanliness, to some extent, the fly cleans itself much more often than humans, because only in this way can the sensitivity be guaranteed.
<h1 class="pgc-h-arrow-right" data-track="11" how do flies eat >? </h1>
So do you know how flies eat? Does it have a mouth? Thoughts? Of course, the fly has a mouth, but it has no teeth, which means that it can't eat solid food, but they will still fall on food such as rice and bread.
This is what makes it unique, when solid food is found, flies will first secrete a large amount of digestive enzymes from the salivary glands, "spit" on the surface of the food, let the food decompose, soften, and then "suck away" the softened food.
belch...... It is recommended that everyone do not watch when eating, which affects the appetite. Therefore, the mouth of the fly is also called the licking and suction mouthpiece, and in order to better digest and absorb, the fly will repeatedly "spit out" and "suck in" here. Don't think this is strange enough, what is even more strange is the digestion of the fly, from eating into the mouth to excreting the body, it is almost 10 seconds.
So sometimes you'll find that the flies are a little cool, wet, and sticky after they land on your hands, and now you know what it is, so there must be bacteria left on the food that the flies have "stood".
In addition to the fact that the fly has no teeth, it also has no nose, so it does not rely on smell to distinguish food, but relies on the sensory organs on the paws to distinguish whether food can be eaten, and naturally does not experience the pleasure of human food.
On the other hand, flies don't have eyelids, so most of the time they rub their heads, they rub their eyes, similar to the action of humans wiping glasses. Yes, the two round hats on the head are the eyes of the fly, which makes its visual system very developed.
You must not imagine that the fly has 5 eyes, 3 of which are independent single eyes, which are used to perceive brightness, and the other 2 are just compound eyes, each compound eye is composed of more than 4000 single eyes, and it can see everything in the 350-degree range without the head rotating.
Human beings are great and intelligent, through the structure of fly eyes, invented the "fly eye camera", the lens of this camera is made of 1329 small lenses glued together, so the resolution is very high, generally used in the military field and scientific research.
<h1 class="pgc-h-arrow-right" Data-track="20" why can't you catch a fly with your bare hands >? </h1>
If humans catch a fly with their bare hands without the help of any tools, I want to be tired and half dead, and I can't even touch one of the wings of the fly, and some people will say that it is because the fly is flying too fast to catch it.
But in fact, the fly does not fly very fast, about 7 kilometers per hour, which is actually similar to the speed of our usual walking. Even dragonflies can fly at speeds of up to 56 kilometers per hour, but why can dragonflies be caught with bare hands, but it is so difficult to catch flies?
On the one hand, because the size of the fly is so small, we can't see its flight trajectory, so it is very difficult to catch it. In addition to this, the more important point is the "eyes" mentioned above.
The flies' eyes are very sensitive, about 4 times more sensitive than humans, so in their eyes, you behave like slow motion in a movie, naturally unable to hit.
Although humans do not like flies, but for the earth we live on, flies have a very important role, biologists say that flies can help plants pollinate, and flies larvae can eat carrion and promote material circulation.
If the squad leader told you that there would be no chocolate in the world without flies, would you still want to wipe them out? Because the pollination of the cacao tree is done through a special fly, it can then flower, bear fruit, and finally become the raw material for making chocolate.
At last:
The life of flies is only about a month or so, in these 30 days, they can accomplish a lot of things, but at the same time they will also carry a lot of bacteria on their bodies, which will endanger life and health, so in the indoors where we live, try not to let flies "attack".
Today's topic: How do you usually deal with flies? Will you still eat food that has been "crawled" by flies? Welcome to leave a comment in the comment area to discuss.