What is the squeak of a mouse?

Rats make sounds in two situations: (squeak).

1, sudden disaster, crying before death. Such as electric shock, entering the mousetrap, etc.

2. Competing for spouses, fighting between male rats, screaming of the weak, and screaming. Under normal circumstances, mice don't make sounds. Walk on tiptoe, be careful, walk against the wall, and wear a crack for fear of making noise.

Related introduction:

Mice are small, and their body colors are mainly gray and brown. The upper and lower jaws have a pair of incisors, most of which have no teeth. Mice have early sexual maturity and usually begin to reproduce a few months after birth.

It can breed several times a year and give birth to about ten cubs at a time. Strong adaptability, wide distribution and many kinds. According to statistics, there are about 480 species of rodents in the world and 34 species in China. Its main characteristics are that its body is conical, without canine teeth, there is a gap between incisors and premolars or molars, incisors are developed, rootless, life-long growth, and ordinary teeth are shortened; Act quickly; Plants are staple food, and some are omnivorous; There are many kinds.

The mouse is a kind of rodent, and its size is large and small. There are many kinds of mice, there are more than 450 kinds in the world. Mouse is one of the most primitive mammals in existence. They are energetic, numerous, extremely fast in reproduction and adaptable. They can eat almost anything and live anywhere.

Rats can dig holes, climb trees and spread diseases such as plague, epidemic hemorrhagic fever and leptospirosis. However, mice provide countless experimental data of drugs.

Like humans, mice use facial expressions to express their discomfort. When they feel pain, their eyes will squint, their cheeks will bulge, their ears will fall back, and their beards will shrink or stand up.

After injection of painkillers, all these expressions disappeared and returned to normal. Through experiments, researchers can determine the degree of pain represented by different facial expressions, which can be used to relieve the pain of mice or other animals in future medical research.