Are rats beneficial animals and what kind of animals do rats belong to?

yes, but sometimes it's annoying!!

Rats (Latin scientific name: muroidea, alias: rats), mammals, rodents, rodents, rodents.

Its body size is small, and its body color is mainly gray and brown; The upper and lower jaws each have a pair of incisors, most of which are toothless. It is sexually mature early, the mode of reproduction is viviparous, generally can start to reproduce a few months after birth, can reproduce several times a year, and it is distributed all over the world except Antarctica.

Morphological characteristics. Mice and mice are smaller, and their body color is mainly gray and brown. The upper and lower jaws each have a pair of incisors, most of which are toothless. Rats mature sexually early, generally starting to reproduce a few months after birth.

It can reproduce several times a year, and each time it gives birth to about 10 litters. It is highly adaptable, widely distributed and has many species. According to statistics, there are about 480 species of rodents in the world, and there are 34 species in China.

Its main characteristics are that the body is tapered, there are no canines, there is a gap between the incisors and the premolars or molars, the incisors are developed, there are no tooth roots, lifelong growth, and common rodents are ground short; Act quickly; Plants are the staple food, and some are omnivorous; There are many types. The rat is a rodent that can be large and small. There are many species of rats, and there are more than 450 species in the world.

Rats are one of the most primitive mammals in existence, they are vigorous, numerous, and extremely fast to reproduce, and they are very adaptable, eating almost anything and living anywhere. Rats burrow, climb trees, and can transmit plague, epidemic hemorrhagic fever, leptospirosis, and other pathogens. But rats provide humans with countless experimental data on medicines.

Like humans, rats use facial expressions to indicate that they feel unwell. When they feel pain, their eyes narrow, their cheeks bulge, their ears back, and their beards clump together or stand up. After the analgesic injection, all of these expressions disappeared and returned to their normal state.

Through experiments, researchers were able to determine the level of pain represented by different facial expressions, which could be used to reduce their suffering when using mice or other animals for future medical research.

Habits. Mice and mice come and go without a trace, and never meet people. They have a keen sense of smell and are especially familiar with human smells. As soon as you smell it, avoid it from afar. Their nests are also in unknown places and are never disturbed.

High alertness. Rats know what ** is by smell, come out at night and hide during the day. High IQ: quite clever, very flexible and cunning, afraid of people, sneaky activities, crawling on the edge of the hole with two front paws when coming out of the hole, looking left and right, to ensure safety before going out of the hole; It likes to build its nest between food and water, and establish fixed routes to avoid danger; The slightest movement or change will immediately arouse its vigilance, and it will not dare to move forward, and dare to move forward after repeated familiarization; Rats have a strong memory and are resistant to food, and if they are attacked, they will avoid the area for long periods of time.

The rat (rat) is a rodent that can be large or small. There are many species, there are more than 450 species, the number is large, there are billions, and they reproduce quickly, they have strong vitality, they can eat almost anything, and they can live anywhere. Rats can burrow, climb trees, climb mountains, and wade through water, which is extremely harmful to humans.

In addition to natural predators, rat traps, people also use instruments (rat traps, rat cages, electronic rat traps, etc.) and drugs to kill rats.

They are cunning and stealing animals, small in size, black animals, and they generally live in small holes in their owners' houses.

The rat is a very stealing animal.

Update 1:Please explain why. Please share with experienced netizens. Please be detailed. Thank you very much.

Rats can transmit diseases, but humans also use white rats as experiments to treat human diseases. Rats are rodents, timid and secretive, preferring to appear day and night to avoid people. Good at climbing, swimming, jumping.

In urban buildings, short circuits of electrical wiring, malfunction and computer system paralysis caused by rat bites are common. Rats prefer to nurse their young in warm, moist places, most commonly near the stove in the kitchen. Because the place is warm and the food is constant**, it is necessary to pay more attention to rodent control in the eating place.

In case rats are rampant. Rats are extremely reproductive, giving birth to 5-8 litters per year. 5-14 pups per litter.

Rats can carry thousands of viruses, and the harm to humans is deadly. There are four main routes of transmission of viruses from rats to humans: 1) ectoparasites such as fleas, gnats and gnats; 2) Rats excreta with pathogens, contaminated water and food; 3) Rat-bitten.

Common rat-borne diseases are 1-"Plague"It is caused by Yersinia pestis and is transmitted through rat bites. 2- "Typhus"It is infected by a virus known as the gram body, which is transmitted by rat lice, and can also be caused by water or food infected with rat urine by wounds or inadvertent inhalation of rat lice feces. 3- "Southern European spotted fever"It is a rickettsial bacterium transmitted by ticks.

Tick larvae live in mice, and adults live in dogs. It is transmitted by ticks sucking human blood and entering the human body. 4- "Scrub typhus"Transmitted rickettsial bacteria are transmitted by rats living in rural areas.

Humans are most susceptible to infections during camping and hiking. 5- "Hatta's disease"In areas with poor air circulation, it is then transmitted by particulates and excreta from infected rats. 6- "Rat bite fever"It is a bacterium that hides in the mouth of rats and is transmitted through rat bites.

Reference: RegentService Service3 Rat] has a bad effect on the health of people and animals (can be seen by me) [Rat] is tied to a dDirty place Fruit D place is the same as it is a place d The bacterial content is high D Bacteria are obsessed with [Rats] both the body, so there are a lot of bacteria in the body. [Rats] will go to our place to find food, which is a human (kind) house, [rat] will leave a d of bacteria (rats walk through the place), fruit d place) people (kinds) after they get it, if I wash my hands and eat the wild, it is equivalent to eating left d bacteria.

Animals are all the same. If the d-animal has weak resistance, there is a chance to die. To put it simply, it is:

Infectious Diseases, Humans and Animals Are Sick 2008-05-12 12:43:31 Supplement:

Nakagawa may die.