Mice usually move at night, and they move the most in summer. Mice stop moving at midnight, but they will start to stir at dawn. However, the mice also will appear in the daytime when they are hungry or their nets are too crowed.

　　Mice will move the food to a hidden place to eat it when the food is too much or can,t be finished quickly at the exposed area. Although most of mice store much food, they will probably not to eat the food. In general, rodents are omnirorus, they eat dumped food, stored food and even the growing grains. In urban cities, Rattus norvegicus Erxleben act as the scavengers, they eat the dumped food by human being or the abandoned food.

　　In fact, the favorite foods of Rattus norvegicus Erxleben are cereals, fishes and meats, boiled eggs, fruits and so on, however the garbage food offers them very balanced food and supplies them enough water at the same time. On the other hand, Rottus rattu L. are not picky to their food, but they prefer cereals, seeds and fruits. Mice grin their teeth not only to consume or pollute the food but also to bite and destroy the packing materials or the equipments of building. According to the statistics, 1/4 of unknown fires in USA probably were caused by mice's biting the electric wires and that made the electricity a short circuit. In addition, electric cables of the computer rooms also suffer the problem now.

　　Mice's sense of smell is extremely keen, they can identify their ally or opposite sex by smell their urine or the secretion of reproduction period. Besides, the sense of touch is also a very important feeling to mice, because mice have very sensitive whiskers and protective body hairs, so it make the mice can pass the dark places easily. This kind of movement by touching objects is called thigmotaxis, this characteristic gives us a clue to put the mice catcher or apply the rodenticide at the right place. Mice's sense of hearing is also very keen, especially they are extremely sensitive to the precipitated sound. Nowadays the research shown that mice have the bimodal acoustic response, except having the hearing range of human beings, the mice also are sensitive to the supersonic. At the sense of sight, mice are not good at identifying objects, and usually mice are all colorblind. For the outside objects, mice only can identify the weak or strong light and merely judge the moveable objects within 10m. For safety, usually the rodenticide baits are colored to prevent hurting human beings or livestock from poisoning.