17 facts from the animal kingdom

Despite the human interest in the kingdom of animals and harmonious coexistence with individual species, much of the life of both wild and domestic animals still remains a mystery to us. It is simply necessary to penetrate into the unknown: no matter how unusual some of the fauna representatives are, they are still our lesser brothers and need, if not care, then understanding on the part of reasonable comrades. If we consider ourselves as such. We present to the reader a selection of facts from the animal world.

Crocodiles do not disdain stones

Yes, indeed, having a very strong stomach, crocodiles are able to eat and even partially digest heavy materials. Fish, turtles, birds, buffaloes, other crocodiles, large predators, as well as stones pass through their digestive tract. The latter, however, are not digested, but for a long time they are in the stomach, playing the role of ballast when diving into the water. They also help grind food in the stomach, which is very handy, because the crocodile's teeth are not very convenient for chewing.

Whale milk is 50% fat

The explanation lies in the impressive size of this mammal. Cubs are one-third the size of their mothers and require easily saturated milk to feed such a baby. The fat content of whale milk is almost 10 times that of human milk.

Birds use landmarks

Naturally, these are not maps or guidebooks, but a built-in ferromagnet that helps birds to easily navigate in space and cover distances of thousands of kilometers. They not only do not get lost in flight, but also often return to their nesting site, using their inner flair and memorable landmarks.

Beaver winter days are longer than the rest

In the cold season, the low temperature near the water bodies where beavers live is felt stronger than ours, the biological clock of these animals is shifted by an average of 5 hours. Avoiding cold, they conserve energy due to fat in their tails, and do not leave burrows, and therefore lose their light orientation.

The blind rats actually see

The African mole rats got their name due to the fact that for a long time they were mistaken by biologists for the blind. But recent studies have refuted this fact. Excavators still have poor eyesight and can easily determine when a predator is entering the tunnel.

Chicks are altruistic

Many people mistakenly believe that natural selection works exclusively on the principle of "the fittest survives." Selfishness has nothing to do with it, but adaptability to the surrounding and changing conditions - yes. In the struggle for their own survival, some birds still manifest themselves quite altruistically. It has been proven that chicks have a developed sense of kinship: during feeding, they make special sounds that allow them to tell their fellows where the food is.

Some fish species change genitals

The phenomenon of hermaphroditism in the ocean depths is more common than on land. Many of the fish change their sex in accordance with hormonal cycles, while others do have female and male sex organs at the same time.

Giraffes have unique blood flow

The exceptional morphological structure of the giraffe's body also functions in a special way. To saturate the brain with oxygen, the heart of a long-necked animal is forced to pump blood twice as much as, for example, other artiodactyls, and a complex vascular system is to prevent the outflow of blood to the head when it goes down.

Elephants are not only big, but also smart

Elephants not only have the largest brains, but they also use their gray matter to the fullest extent possible. It is difficult, of course, to compare it with human potential, but the coefficient of encephalization in an elephant is 1.88, while in Homo sapiens it is 7, 33, in a chimpanzee - 2.45, and in a pig - 0.27. And first of all such an indicator indicates a good memory.

Parrots are very understanding

We perceive parrots' conversations as meaningless and noisy chirps, but research in recent years shows that these birds are capable of more than primitive imitation. The parrot can solve linguistic problems at the level of a six-year-old. These birds understand the meanings of some words, and are also well versed in numbers.

Dogs don't like to cuddle

Loving and affectionate dogs, as they are considered to be, are still very careful about their personal space. In addition, they perceive such actions as a sign of domination. It is generally accepted that a dog that friendly puts its paw on its owner expresses its gratitude in this way, although in fact it is an attempt to show its superiority over a person.

Dogs predict human illness

Everyone knows that dogs have a phenomenal sense of smell and are able to smell almost any change in the state of health of their owner. Sensitive tetrapods may notice changes in the chemical composition of a person's sweat before an epileptic seizure or when blood sugar levels rise. There are also known cases of dogs being able to smell cancers even before the diagnosis was made.

Cats cannot tolerate milk

Contrary to popular belief, cats should not be fed with cow's milk. Most of them have congenital lactose intolerance, and eating dairy products can cause serious disruptions in the functioning of the feline body.

Goldfish are trainable

The fact that aquarium fish do not have a good memory has long been refuted by scientists. These silent pets are nowhere near as stupid as commonly believed. They are able to analyze, memorize forms of behavior, and also amenable to training.

Turtles are very sensitive

The bony shell of the turtle does not protect it from touch, because it has nerve endings. And also these reptiles can live without water for a long time. They have a complex digestive system that helps them easily go without fluids.

Chinchillas shed their fur

This works as a defense mechanism when the animal is faced with stress or feels threatened. The coat grows back quickly.

Horses are vindictive

Horses, like elephants, are distinguished by high intelligence and good memory. Moreover, experiments show that they are capable of analyzing actions. Therefore, if you are planning to hurt her or offended a cloven-hoofed animal, then it is quite expected that you will be rewarded a hundredfold.