Sizes of rats, weight of domestic and wild animals

Rats can eat any food and are prone to overeating. Therefore, they can quickly gain unhealthy weight. This can lead to serious illness.

If you want your rodent to remain healthy, you need to monitor its weight. It is important to know the standard parameters of rats to determine whether the animal is developing properly and what its health status is.

What determines the size and weight of rats?

The body weight and size of a rodent depends on several factors:

The species to which the animal belongs. For example, small rats (Rattus exulans) weigh about 70 g and are only 14 cm long. But pasyuks, which are familiar to humans, grow to 20-25 cm and gain a weight of 200-390 g.
Gender of the rodent. Males, both in nature and among ornamental representatives of this species, are approximately 10-15% larger than females.
Hereditary data. If the cub's parents are small, then it is unlikely that it will grow into a large rat. This also works in the opposite direction. In large individuals, the appearance of small offspring indicates some kind of pathology or unfavorable factors during the female’s pregnancy.
Food and living conditions. The ability to obtain adequate nutrition directly affects how much a rat will weigh. If during pregnancy the female does not receive adequate food, the offspring will be more frail. Vitamin and mineral deficiencies during infancy also affect adult size. The animal will be weak and noticeably smaller than its fellows.
A calm, comfortable environment has a beneficial effect on the weight of animals. A state of constant stress can inhibit development in small rodents.
Health. The size of an adult rat is directly related to the condition of its body. Of course, it will not become larger than the parameters assigned to it by nature, but excessive thinness and weight loss are direct evidence of an illness in the animal.

Homemade

Measuring the mass of a rodent is simple; just place it on some sensitive scale. Kitchen ones are also suitable. But there are problems with measuring length. The plastic structure allows them to both stretch the body and compress it. The difference in numbers will be colossal.

Grooming

They constantly need to comb their white fur, and they also need to be washed constantly. To comb the rodent, use a toothbrush, and be sure to have a soft one. While combing, you will have to hold the rodent with your thumbs and forefingers.

If you find yellowness in your pet's fur, then this is a reason to worry. It is possible that your rat is sick and is unable to care for itself.

Important! You should not risk the animal's psyche if you decide to clean the fur by washing it in a basin. You can simply wet cotton pads and wipe your pet's fur

After the procedure, you need to wipe the rodent dry.

Place the cage with the animal away from direct sunlight, as white rats are afraid of bright sunlight.

The largest and smallest rats in the wild

Species of rats differ among themselves in their habitat (some prefer to live close to humans, others far away), in size, and taste preferences. People have known some of the representatives of rodents since ancient times, and some they met quite recently.

The giant Papuan or Bosavi woolly rat does not even have a scientific name yet. It was discovered in 2009 on the island of Papua, which belongs to the territory of New Guinea. It received its temporary name due to the crater of the Bosavi volcano, where it was discovered. Perhaps it can be considered one of the longest rats, since the size of the body reaches 1 meter, plus a tail of about 30 cm.
Cane rats or bristle pigs are real giants. Despite the body length of 55-60 cm, the weight of females reaches 4-5 kg, and in males it can reach up to 9 kg. They live in equatorial and southern Africa.
In Russia, the largest breed is the pasyuk or gray rat . Its body length is 17-25 cm, and its weight is 140-390 g.
The size of the smallest rat found in the wild barely reaches 11–15 cm, weight from 40 to 80 g. The little ones live in New Guinea, the Pacific Islands, and Southeast Asia. In addition to the official name - small , they are also called Pacific or Polynesian .

Children's legends about mutant rodents that appeared due to environmental problems do not have any supporting facts.

Red kangaroo

This small mammal belongs to the rat kangaroo family. It is so called due to its reddish-brown color. Marsupials are found in Australia and are a rare species. In size, the large rat rodent kangaroo resembles a rabbit; in all other respects, the animal is not much different from a kangaroo. The length of its body is up to 55 cm.

Being the only species of its genus, it is the largest of all kangaroo rats. Their length can be up to half a meter, and their tail can be forty centimeters. Feeds on plant foods.

The largest city rats

City rats are the same animals that live in rural areas. For a long time, black representatives of this family settled in the attics and basements of houses, lurked around the streets and spoiled the supplies of the townspeople, and served as a source of various diseases. In the 18th century, gray rats began to spread from port cities throughout Europe. Larger, aggressive, eating not only grain reserves, but also meat products, they became a disaster.

A big street rat could drag away a chicken, attack a small child, and, driven into a dead end, bravely fought with cats and dogs. Gradually displacing black rats, pasyuks began to spread throughout all the countries where people live. The most important thing for these animals is the availability of water and food. The only place they avoid is heights. It is almost impossible to meet them on the upper floors of skyscrapers. That's why there are still black rats there, which prefer dry attics. The native element for gray rodents is basements, communications, metro lines, sewers.

Wild animal

Any measures to destroy pasyuks only temporarily reduce their colonies. Smart animals with a clearly constructed hierarchy and defined roles within the group never risk the entire flock. They quickly learn to avoid any human traps and can temporarily leave dangerous territory. But as soon as the colony grows, everything will return to normal.

Interesting facts about the rodent:

Rats cause economic damage as they eat and spoil food and non-food products, damage electrical networks, and cause damage to agriculture. In addition, they are a natural reservoir for many zoonotic and anthropozoonotic infections (plague, tularemia, rabies, typhus, toxoplasmosis, leptospirosis, rickettsiosis). Therefore, many methods have been developed for their destruction - deratization. But rats can adapt to and recognize poisons.
In the United States, rats bite about 14,000 people every year.
Since the 19th century, specially bred rats have been kept as pets. They are also bred as “live food” for home terrariums and zoos.
Rats are the main experimental system in biological and medical experiments. Special laboratory rats were bred for this purpose. They are distinguished by their fast metabolism, unpretentiousness and peaceful nature.
Rats are considered very intelligent animals; along with humans, they have abstract thinking. In addition, they respond to tickling and produce ultrasonic laughter-like sounds.
In China, the rat is a symbol of prosperity and the first animal to open the cycle of the eastern horoscope. In Islam, the rat is the embodiment of sensuality, and Hinduism represents the rat as a former demon.

Size and weight of pet rats

Artificially bred decorative rats are increasingly winning the love of humans. Having been born less than 70 years ago, thanks to a strict selection of producers, we managed to obtain affectionate, peace-loving and intelligent animals. Breeders, taking advantage of the rapid emergence of the next generation in these rodents, are excitedly developing new breeds.

Despite the fact that pets are all approximately the same size, there are several species with the largest rats.

Brown. On average, the animals weigh 500-600 g, but some specimens reach 900 g. Although this cannot be called the norm. It is possible that the rodents are obese. Representatives of this species live only two years.
Standard. One of the most common breeds. Affectionate and non-aggressive rodents rarely bite despite their very large size for an ornamental rat. They weigh up to 500 g, body length is about 30 cm.
Dumbo. Representatives of this species were bred in California. Their large protruding ears give their faces a funny expression. The value of a breed representative is determined by the length of the ears. They grow up to 20 cm and gain a weight of about 400 g.

Training and playing with your pet

Dumbo is very trainable

Dumbo rats are quite obedient and easy to train. They love to play with soft and hard balls, willingly explore labyrinths and run through their owner's hands. Many pets love to climb onto the shoulders and watch everything that happens from there.

If you want to teach a rat various tricks, you need to remember a few rules for training these rodents:

The optimal duration of classes is 20–30 minutes.
The animal is fed for the last time 8–10 hours before class. In this case, he will be more willing to do what the owner requires, wanting to receive food for it.
It is necessary to ensure that the animal fully understands what is required of it. Only after this do they move on to learning other tricks.

What can you teach a Dumbo rat:

find one object from several,
get out the pieces of paper and beads hidden in the matchbox,
stand on its hind legs at the owner's command.

Average size of baby rats based on their age

Rats are born blind, without fur and with closed ears. Weight at birth is only 4-6 g. Thanks to the mother's nutritious milk, babies grow quickly, adding 2-3 grams every day.

Already on the 10th day of life, they hear well, are covered with fluff, and begin to actively explore the available space. Their body weight increases 6 times during this time.

After 20 days from the moment of birth, rats become similar to adults and grow to a size of about 15 cm.

On the 25th day, the babies are separated from their mother, otherwise the female will independently expel the offspring from the nest into an independent life.

Active growth of young animals continues up to 6 months, but a rat can reach its maximum size only by the age of one year.

Young animals

Approximate weight of the animal depending on age:

Newborn – 4–6 years.
2 months – 160–220 g.
3 months – 210–310 g.
4 months – 250–430 g.
5 months – 300–540 g.

We must not forget that the given indicators are averages, according to which you do not need to adjust your pet. If the animal is active, feels great, and its fur is shiny, then there is no need to try to feed it more high-calorie food or, conversely, limit its food intake.

Characteristics of panoramic perception

To compensate for myopia, rodents are given panoramic perception. The eyes of the animals are located on the sides of the muzzle. This arrangement provides expanded visual coverage of the territory.

It is worth noting that in animals the pictures that each eye sees do not coincide and are not combined into a single whole, as is the case in humans. Thanks to this overview, the animal quickly notices the appearance of an enemy.

The distance of the eyes from each other negatively affects binocular perception. If in humans it is 105%, then in rodents it is only 76%. This low figure is slightly compensated for by a visual feature called motion parallax. With its help, the rodent determines the distance to the object. When you move your head from one side to the other, objects also move. The movement of nearby objects is accelerated. This difference allows the animal to determine the distance.