The Mongolian gerbil, Meriones unguiculatus , is a rodent that is native to the desert regions of Mongolia and northeastern China. It is curious, nearly odorless, friendly, smart and easily trainable.
Gerbils are burrowers, social and form monogamous pairs.
In the wild, they are generally diurnal with crepuscular tendencies but in the active environment, they are mainly nocturnal, although they do have active periods in the day and consume food both day and night. They have elaborate burrows with lots of tunnels, multiple entrances, nesting rooms and food chambers where food is stored. They come in a variety of colors and color patterns. They are legal as pets in most states but not in California, where they are forbidden by law. If gerbils are irritated or feel that their territory has been invaded, they will stamp there hind feet on the floor.