Vision in rats

Rats are characterized as smart, cunning creatures. They have good mental ability, visual memory. Rodents cleverly evade rat trapsare rarely caught in traps. A person involuntarily raises the question of how rats see. To deal with the enemy, you need to know as much information about him as possible.

Color difference

The human eye contains 2 types of light receptors - cones, rods. The first perceive bright light and different colors. The second catch the dim light, allow you to see in the dark.

The rat’s eye also contains rods and cones, but the density of their arrangement relative to each other is different. This affects the perception of colors. The rodent's retina captures shortwave, midwave spectra. The rat sees a blue, ultraviolet spectrum of color and green.

The rodent's retina is 99% composed of rods. Cones occupy only 1%. A person has 5% of them. Interesting one rat factthat she does not see a colorful tone, does not distinguish colors. Much more important for her is the brightness, dullness of light radiation.

Features of UV Vision

The eyes of the rat are under study. In the course of numerous studies, some features of how different people look at the world around them became known. rat species.

1. See marks with urine. Animals catch traces of urine by smell and color. In the dark, discharge is visible in ultraviolet light. Predators mark their territory in this way.
2. They see the body in ultraviolet light. Different parts of the body of an animal, a person emit ultraviolet light of a different wavelength range.
   

   Interesting!

   In a beast such as degu, the stomach emits longer ultraviolet rays. When he sleeps, he shows his relatives a tummy. During the hunt, the animal is on 4 legs, the back makes it invisible in the dark.

3. Twilight ultraviolet vision. In the daytime, ultraviolet rays are abundant. At night, only creatures with a certain eye structure can notice them. Rats are nocturnal, see in the dark.

Important!

Rats see the picture blurry. The visual acuity in a rodent is 30 times less than in humans. In albinos with red eyes, 40 times. Depth of field from 7 cm to infinity. In humans - from 2.3 m. This suggests that rodents see only at a small distance.

Features of panoramic view

Poor vision in rats is offset by panoramic perception. If you pay attention to rat appearance, her eyes are located on the sides, which allows to cover a wider area. Each eye sees a different picture. This allows the animal to quickly navigate in space when the enemy, the victim.

The wide arrangement of the eyes relative to each other reduces the rate of binocular vision. Rodents have a weak perception of depth - by 76%. In humans, binocular vision is 105%.

Interesting!

The low rate of binocular vision is offset by the phenomenon of parallax movement. It helps the animal determine how far or close the object is. If you move your head from side to side, objects will also move. Objects located a short distance from the eyes move at a faster speed.Before jumping or entering unfamiliar territory, the animal for some time sways its head in different directions. So he determines the depth of the distance.

Visual orientation

Vision in a rat has its own characteristics, complemented by the characteristics of the brain, thinking. The animal is well oriented in the familiar space, because it remembers the location of objects.

A study was conducted when rodents moved through a maze. After the construction was turned upside down, the animals went astray from the intended course. When the objects moved along with the maze, the rodents behaved as usual.

Pests can clearly see objects located at a distance of 50 cm. They distinguish whether the path ahead is clear, within 75 cm. To determine a closer location of objects, use the sense of touch - mustache.

What vision do rats need to know in order to outwit rodents and get rid of them in a timely manner. It is also worth considering that with age in animals the vision decreases. Rats do not live longTherefore, vision begins to deteriorate after 2 years of life. This explains the fact that old individuals are more likely to fall into a trap, a trap.