What kind of mouse is the biggest?

Hydrocapybara (Hydrocapybara) is a semi-aquatic herbivore and the largest rodent in the world. It belongs to the family Capybara, with a single species. It is distributed from Panama to northern Argentina, with a body length over 100 cm, a standing shoulder height of 70 cm and a maximum weight of 66 kg. As thick as a pig, the coat is rough and sparse, brown or gray. The snout is short, the ears and eyes are small, and the nostrils are upward. Short limbs, semi-webbed toes, 4 toes on the front foot and 3 toes on the back foot, with a hoof-like grip. The tail is so short that it almost disappears. The anal glands are well developed, and the upper part of the nose of male individuals is wide and hairless, with black oval smelly glands (morrillo). The skull is similar to capybara, but bigger and stronger than it. The maxillary structure is more squirrel-shaped. The suborbital foramen is large, the zygomatic arch is developed, and the zygomatic bone is separated from the lacrimal bone. The auditory vesicle is normal and the mastoid is extremely developed. The upper buccal dentition is 8-shaped. The incisors are chisel-shaped, the buccal teeth are high crown teeth, the third upper molar teeth are very long with 9 ~ 10 transverse odontoid process, and the crowns of other buccal teeth are smooth. The capybara is a semi-aquatic animal, good at swimming and diving, lives in groups near the waters and feeds on aquatic plants, which is one of the main foods of large carnivores in South America. Meat can be eaten, and fur can be used as raw material for tanning. The capybara and guinea pig farms in South America are the largest rodents in the world. In the swamps and rivers from Panama to Uruguay in South America, a large number of wild capybara live. Venezuelans like capybara meat. As early as the18th century, Spanish immigrants started hunting capybara with shotguns when they set up cattle farms on the South American prairie. After the slaughter, they put the salt in carmine and hung it in the sun to dry. Because Roman Catholicism forbids red meat (refers to cattle, mutton, etc. One week before Easter, capybara meat became a hot commodity at that time. By the middle of the 20th century, eating capybara meat in the week before Easter has become a national habit, resulting in few wild capybara being arrested and killed. Later, the Venezuelan government stipulated that only cattle farmers were allowed to fish in this field. Generally, 30% of the total catch is allowed at the beginning of early season. At present, about 100 cattle farms in Venezuela are licensed every year, and 85,000 wild capybara are killed, equivalent to 2,000 tons of fish. Because capybara is very fertile (female capybara can give birth to one litter every 8 months, with about 4 per litter, and reach sexual maturity at 18 months), this catch can be maintained every year. Farmers like to raise them on the same grassland. The capybara eats water grass, and the cow eats land grass, each of which occupies one side, and does not compete with each other, which has great economic benefits. Venezuelans have realized the significance of protecting capybara. They catch capybara quantitatively on schedule to maintain a certain number of capybara populations. However, poachers, hunting dogs and wild dogs often endanger the survival of capybara. Capybara meat tastes like pork. Lean meat is delicious, and fat meat tastes bad, mainly from plants with bad smell, which is caused by the direct conversion of vegetable oil into animal fat. The solution to this problem is to remove the fat of cochineal insects or capture and slaughter capybara at the early stage of thinness. When cooking, you can cook the meat three times to remove the fat, and pour out the water after each cooking. At present, Venezuela produces 2000 tons of capybara meat every year. Guinea pigs are also rodents. According to historical records, as early as 2500 BC, Peruvians concentrated on raising guinea pigs. At present, there are 20 million domestic guinea pigs in Peru. Guinea pigs are very fertile: they give birth to 3-4 litters 70 days after mating, and females can reproduce after giving birth to 3 litters. The offspring can reach sexual maturity at the age of 2 months, and can grow to 800 grams (that is, slaughter weight) at the age of 3 months. The domestic guinea pig is very simple. Peruvians can build a cage (made of wood, metal or fishing nets) in the yard, or build a bird's nest to raise them. The Peruvian government has built the largest guinea pig farm in the world. There are 20,000 guinea pigs in the 15 guinea pig house built along the hillside. There are many fences on the inner board of the shed to feed female guinea pigs, young guinea pigs and growing guinea pigs respectively, and only male breeds are raised by guinea pigs alone. The feed for guinea pigs is generally sugarcane leaves, corn leaves and various plants and farm wastes grown locally. Guinea pigs seldom drink water and their feces are dry. They should be cleaned every two or three months. Feces have high nutritional value. It is reported that they contain 14- 17% crude protein, which has been proved to be a protein additive feed for sheep. The Peruvian government encourages the consumption of guinea pigs. They established 1 1 breeding farm to cultivate excellent guinea pigs with fast growth and heavy weight. Capybara and guinea pig are tender in meat, delicious in taste, high in nutritional value and easy to raise.