General information about the animal world

General information about mammals 

Below is some general information about mammals: 

• Cats can bark instead of meow, and all they have to do is push air through their vocal cords with more force than normal.
• Mice respond to tickling, and make sharp sounds that resemble laughter. 
• The koala bear has a fingerprint so similar to a human fingerprint that it is surprisingly indistinguishable from human fingerprints even under an electron microscope. 
• The body of the male sea otter or otter covers about 800 million hairs, so it is considered the densest animal among all mammals, knowing that the hair that covers the human body does not exceed 5 million hairs.
• The fur of the polar bear consists of tufts Hollow and transparent hair that reflects the sun's rays, so the bear's fur appears white, and the color of the skin under the fur is black to help absorb warmth from the sun's rays.

General information about birds 

Below is some general information about birds: 

• A chicken can turn into When the left ovary is damaged, it is known that the gonads on the left side of the chicken’s body become ovaries with the growth of the hen, while the gonads on the right side of the body remain in a state of dormancy or hibernation, and when the left ovary is damaged as a result of a tumor or other , the static gonads begin to appear and grow, and if they develop into a testicle and begin to secrete androgen, which is the male hormone, the chicken will turn into a rooster, and a mane and a wattle will grow, and it will be able to shout.
• Few male birds are able to secrete a liquid called milk. The giblet or sparrow milk to feed the chicks, and these birds are: the emperor penguin, the greater flamingo, the pigeon, and the dove.
• The ostrich is the heaviest and longest bird species, with a weight of 156.5 kg, and a length of 2.7 m, and the hummingbird is the smallest bird; Its length from the beak to the end of the tail does not exceed 5.6 cm.
• The sulfur crest cockatoo is the longest-lived bird; Where he can live for 80 years.
• Birds do not have teeth, so they cannot chew food. In contrast, many types of birds swallow pebbles and store them in a muscular bag called the gall, and during the contraction of the crop, the pebbles break food particles, and the species that do not swallow pebbles are Able to use the great muscular strength of its crops to grind food. 

General information about reptiles 

Below is some general information about reptiles: 

• The chameleon's tongue is as long as its body, if not longer, and its tongue takes parts of a second to catch prey.
• Snakes are not able to close their eyes because they do not have eyelids, but rather have transparent scales that cover their eyes, and they shed with the shedding of the skin. In the central nervous system, and can lead to paralysis, respiratory failure, and death.
• Some types of snakes pretend to die when they feel threatened; It turns on its back, opens its mouth, hangs its tongue, and emits an unpleasant odor, and some turn their head to the side, open their mouth, and fix their eye sockets.

General information about amphibians 

In the following some general information about amphibians: 

• A type of frog, a frog, manages Southern cricket frog jumps to a height of up to 60 times its body length, that is, like a person jumping from a 38-storey building. 
• Frogs have an inner ear and a middle ear, but they do not have an outer ear, and in return they have An external eardrum, i.e. on the outside of the head.
• Amphibians are forced to stay near the water because their skin is thin and permeable to water, and thus their skin may lose its moisture if it ventures away from the water and becomes prone to dehydration and death.

General information about fish

Here is some general information about fish:

• Sailfish, swordfish, and marlin are among the fastest fish in the ocean, reaching speeds of approximately 113 km/h. The Rougheye Rockfish is the longest-living fish; Where it can live more than 200 years.
• The male Cardinal Bangai fish carries the eggs in its mouth until the eggs hatch and the chicks are able to rely on themselves, so several weeks pass before they can eat their food. The whale shark is the largest species of fish in the world, with a length of 12.6 meters and a weight of 21,500 kilograms.
• Some fish, such as sharks, do not have an air bladder to help keep them afloat, so they must swim constantly, and when they get tired they can sink to the bottom to take a rest.
• Fish have a system of sensory organs known as the lateral line organs, and it has an important role in guiding the fish, and helping it to navigate in dark or turbid water.
• Fish sleep at night, and feel insomnia like humans, for example, the streaked danios loosens its tail when it wants to sleep, and it falls to the bottom of the tank, and when the hypocretin neuronal receptors in its body are exposed to something, the fish get insomnia, which affects their behavior and ability to sleep. Learning the next day.

General information about invertebrates

Here is some information about different types of invertebrates:

• A slow-paced, tarigrad, or water bear, which is a microscopic animal with 8 legs, can live in very difficult conditions, to the extent that it seems impossible to kill or get rid of it, as it is able to live without food or water for 30 years, and withstands ionizing radiation that can Fry an elephant, and it can live for long periods in space, and the secret is due to its ability to enter a death-like metabolic state known as hidden vitality, and it can remain in this state for long periods until the surrounding conditions return to their normal state.
• The octopus has 3 hearts, two of which pump blood through the gills, and the third pumps blood to the rest of the body. The octopus also has 9 assemblies of nervous tissue or brains, where the main brain rests in the octopus's head, and the rest of the nervous tissue is distributed over its eight arms, allowing it to move independently. It gives her the ability to think primitively.
• There is no definite sex for earthworms, as all worms have male and female reproductive organs, yet two individuals must mate for reproduction.
• Starfish can be divided into 5 pieces, and if each piece contains a portion of the central disk, the five star fish will survive.
• Locusts, cockroaches, and grasshoppers have small ears on their front legs.
• The mother of a species of Australian spider encourages her young to eat them when food sources are limited.
• The scorpion dies if it is surrounded by fire, because the heat changes the properties of the proteins that make up its body and coagulate it, causing violent convulsions that affect the body and lead to its curvature, and it ends with the death of the scorpion, contrary to the popular belief that the scorpion stings itself if it is trapped in the fire to get rid of pain.