Rats are mammals, rodents, rodents, commonly known as "rats", and their reproduction mode is viviparous, which is the fastest reproduction and strong viability among mammals.
They have strong reproductive ability, good adaptability and great chances of survival, so their number has increased very rapidly. They can mate all year round, with a pregnancy of about 265,438+0 days, giving birth to 6 to 8 babies a year, and giving birth to 5 to 65,438+00 babies at a time. The little mouse continues to produce. One can reproduce in two or three months, and a female mouse can increase thousands of mice in the family in one year! Very scary.
Mice mature early and have strong reproductive ability, and their life span is 1 ~ 3 years. The newborn mouse has no hair, red skin, closed eyes and ears stuck to the skin. Crawl for a week and open your eyes in 12 days.
Besides humans, mice are the fastest and most successful mammals. Take a kind of domestic rat that often moves in human living areas as an example: it can conceive up to eight times a year and give birth to four to seven young rats each.
In addition to consuming or polluting food, rats also like to grind their teeth, so quite a lot of packaging materials or construction equipment are bitten by rats. According to statistics, a quarter of unexplained fires in the United States may be caused by rats biting wires.