The hamster is the general name for animals in the subfamily Hamster. *** Seven genera and eighteen species, mainly distributed in Asia, a few distributed in Europe, of which there are three genera and eight species in China. In addition to the distribution of small hamsters in Central Asia, other species of hamsters have cheek pouches on both cheeks, extending from the side of the molars to the shoulder. It can be used for temporary storage or carrying food back to the hole storage, so the name hamster, also known as gills, moving hamster, although it often clean up the hair, but it is still difficult to eliminate the body of an odor, so people if you raise it, must be every day to the rat sand to dispel the stench. Hamsters are mainly active at night, with poor eyesight, only fuzzy shape, color can only distinguish black and white. The sense of smell is sensitive. Hair color is complicated. Breeding after the end of spring, 2-3 litters per year, 5-12 per litter. The average life expectancy is 2-3 years.