Are there any benefits to mosquitoes? Detailed answer

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Are there any benefits to mosquitoes? Detailed answer

Big encyclopedia for children and adults

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Are there any benefits to mosquitoes?

Mosquitoes (mosquitoes) live on Earth, like all other organisms. A person does not want this, he tries to get rid of them, but he does not succeed well. Mosquitoes are distributed throughout the Earth. Some species are ubiquitous, while others are found only in certain areas. About 70 species of mosquitoes live in the United States. Man wants to get rid of mosquitoes because some species spread disease. Insects carrying the yellow fever virus, for example, have been eradicated from many tropical areas where they have been found.

Mosquitoes have two more features that irritate humans. First, mosquitoes bite. When a female mosquito bites, she releases a poisonous liquid into the bloodstream. This venom causes pain and itching at the site of the bite. Secondly, annoying mosquito buzzing. This buzzing is very important for mosquitoes, it is a kind of love game. The male calls the female with a low, deep sound of rapidly vibrating wings. And the female makes a piercing sound.

Can mosquitoes be somehow useful to humans? The only benefit can be derived when certain species of these insects eat other species that are even more harmful. For example, the larvae of those mosquitoes that do not bite are fed by the larvae of others that bite.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How was the Minotaur born?

Once Poseidon sent the Cretan king Minos a sacrificial dazzling white bull, which appeared from the sea. Struck by the beauty of the animal, Minos sent him to graze in his own herds, and sacrificed another bull to the god. Offended by such neglect, Poseidon in revenge made Pasiphae, the wife of Minos, fall in love with a bull. She told the famous inventor Daedalus about her passion, and he decided to help the queen.

He built a hollow wooden cow, covered it with a skin, put it on wheels hidden in the hooves and rolled it out into the meadow where the bull of Poseidon was grazing. Before that, Pasiphae climbed inside the cow through a special door. When the white bull mounted the cow, Pasiphae satisfied her passion. After some time, the Minotaur was born to her - a monster with a bull's head and a human body. Some, however, say that Minos, annually sacrificing to Poseidon the best of the bulls he had, once became greedy and sacrificed the second most beautiful bull, thereby angering Poseidon.

Others say that he offended Zeus. Still others argue that Pasiphae herself did not propitiate Aphrodite for several years in a row, for which she punished her, inspiring such a terrible passion. To hide the shame of Pasiphae, Minos, on the advice of the oracle, turned to Daedalus, and he built the Labyrinth - a dungeon with intricate passages, in the very center of which Minos hid the Minotaur.

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Silent planes on owl wings 08.12.2012

Researchers from the University of Cambridge studied the quietness of an owl. Their work opens up new possibilities for reducing aircraft noise.

Owls have an "uncanny" ability to fly silently with the help of special wing plumage. Scientists have carefully studied the structure of the owl's wings in order to better understand how this invention of nature can be applied to modern aircraft.

All wings, natural or artificial, create turbulent eddies that amplify at the trailing edge and dissipate as sound waves. Conventional aircraft with rigid trailing edges create a lot of noise because of this. Scientists have long assumed that at least three different factors are responsible for the silent flight of an owl: stiff feathers along the leading edge of the wing, soft down on the upper part of the wing, and a fringe of feathers on the trailing edge of the wing. These features allow you to effectively eliminate aerodynamic noise from the wings, better hear prey and hunt successfully.

Until now, it was not known whether all three "owl factors" are needed to reduce noise, or just one is sufficient. British scientists tried to answer this question by developing a theoretical model that describes the ability of an owl to reduce the sound of the trailing edge of the wing. Prior to this, experiments have shown that owl wing noise is weakly dependent on airflow speed, with the greatest reduction in noise occurring in the high frequency range, to which the human ear is most sensitive.

Using mathematical models, British researchers found that a resilient and porous wing trailing edge can significantly reduce aerodynamic noise at certain flight speeds. This means that there is an opportunity to make passenger airliners quieter, and drones almost silent.

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