How animals see?

For people who normally see everything in three dimensions. We find it hard to imagine that someone could see the world differently. To feel it, Mikhail Filonov offers to do the following experiment: Close one eye and try to fill with water cup. In all likelihood, you will not soon be able to do so, especially if the circle will be located at some distance from the eye. How can this be explained?

Using one eye, you almost lose the ability to see the world as used to. You can not determine exactly how far, how deep are the observed objects. You see everything in one plane. So most animals.

It is easy to understand, sees an animal in three dimensions or not: just look at how are his eyes. If they are parallel on both sides of the head, like a horse, pigeon, or a lizard, the animal does not see in three dimensions. Conversely, if the eyes are located on the front side of the head, as in monkeys and cats, you can be sure that the animal sees clearly.

In fact, both eyes see objects at slightly different angle. Juxtaposition of two paintings, which differ little from one another, gives a vision in three dimensions, is called «binocular» or «stereoscopic». In animals whose eyes are located on opposite sides of the head, two pictures do not accumulate, and they do not see clearly. Both ways by which animals can see, have both advantages and disadvantages.

For example, a
horse's eyes are exactly parallel to the sides of the head, so she does not see clearly. Yet it can, without turning my head, consider what happens on the side and even behind: the visual field, it is huge. Vision is adapted to its way of life - the absorption of grass does not require evaluation of distances with great accuracy.

Cat's eyes are in front, his binocular vision. He - a hunter and a vision of peace for him is important: it is possible to accurately determine the distance from which to make a jump during the hunt. In nature, herbivores, much more than carnivores. That is why the number of animals that see in three dimensions is small. The most sharp-sighted, watchful of all animals - birds of prey.

In fact, their eyes are located on both sides of the head, but they are convex and protruding. So the birds can see everything that happens in front and side, and with such accuracy, which can only dream of. For example, a falcon, even when it is high in the sky, could see a field mouse on the ground and rush to her with lightning speed.

Wondering whether the animals color? The study's author believes that some of them do not distinguish. Others, such as a bee, distinguish colors, which we totally unfamiliar. The dog recognizes the bad color. Even if it is taught to distinguish between, say, a yellow ball, it continues to confuse it with some gray. Rabbit, cat, raccoon, bull too bad recognize colors. People say that infuriates the bull red, but this simply can not be.

Mammals distinguishing colors, very little. In this regard include moor bear and apes. But if the subject is painted in very bright tone, you can be sure that any animal will allocate it from the others. And indeed, because not for nothing that nature has given many fish, insects, amphibians and other animals, bright color.

Good enough to differentiate between colors lizards and turtles, as their ocular device contains droplets of yellow fat, which play the role of filtering points. The fat that improves contrast and reduces glare green, which affects the animals that live among the grass.

Of course, the vital information in the above facts there. But apart from the fact that they are simply curious, perhaps, someone that will help better understand the worldview of their pet.

"ШколаЖизни.ру"
http://animaldin.blogspot.com/

next article:Snail
previous article:How to educate puppy?