The world of insects is diverse and interesting.It can be studied indefinitely, but I would like to find the answer: is there a five-eyed insect in nature? It's hard to believe, but there is such a phenomenon. Beings with several pairs of eyes are quite numerous. For example, a spider has 8 eyes. But the five-eyed insect is a habitual fly, and another bee, hornet and dragonfly. Let's talk more about flies and bees, because these insects are of interest to many.
A fly is an annoying insect that harms us.every year, but it survives almost entirely thanks to man. There are more than 1000 different types of flies, and many of them live near human habitation.
The study of the organs of sight of flies represents a hugeinterest. The five-eyed fly insect sees the world in a special way. The main pair of eyes in her consists of separate small segments-eyes. Each such eye is called facet, and the whole organ of vision as a whole is the faceted eye. In total, the usual room fly has 4000 small lens facets. With such a complex organ, flies can well view objects from a close distance, especially creeping over them. However, nature decided that the fly is not enough, and added three more simple eyes to the insect on the forehead. The multi-faceted eyes located on the sides of the head, and 3 simple eyes on the front of the head provide this five-eyed insect with an almost circular view.
Facetted eyes of flies are huge in relation tothe size of the head. They are especially large in males. The eyes of many males are connected on the forehead. The picture in front of the facetted eyes of the insect changes with a frequency of 250 Hz, for comparison, this figure in humans is 60 Hz. That's why the fly is so hard to catch or slam, because it seems to her that the fly swatter is flying, like in a slow motion picture.
Here, it would seem, what else can surprise us?But you can! Imagine, the bee has several eyes on the crown of the head. It is also a five-eyed insect, but its additional organs are not located on the forehead, but behind the head.
The two large lateral eyes of the bee, like the flies,are faceted. Each cell transmits information not about the whole subject, but only about its small part, and the general picture is added by the brain of the insect. To the general image is attached information obtained by simple eyes. Here, only the light stream, which the bee can distinguish, consists of shorter waves. The insect distinguishes between ultraviolet waves and sees much more shades.
The researchers put forward a theory that forObservations of closely located objects of the bee use 3 simple eyes. And during the flight they are guided by the faceted vision. However, beekeepers do not completely agree with this statement. They noticed that if a bee gets damaged facet eyes, then begins to stumble on objects, like a blind. But if the simple eyes are damaged, then the vision does not disappear, just the insect reacts more slowly to the surrounding world.
Such a complex system of vision is necessary for bees to protect the family and to obtain food. A male, drone sharp eye helps to find a female for mating.
As you know, the dragonfly is also five-eyed.insect. But her organs of vision are even more complicated. The eye of a dragonfly has 28 thousand facets and can catch ultraviolet waves. In addition, the dragonfly polarizes the image, which allows it to reduce reflections from the surface of the water.
Another interesting fact about the sight of dragonflies. This insect has panoramic vision. And the review - 360 °.
An interesting fact is thathornets, even five-eyed insects, despite the external resemblance to bees, additional eyes are located not on the crown, but on the forehead. They form a small triangle between a pair of facetted eyes.
