Mongolian gerbil They are somewhat larger than mice, with a body about long (and a tail of similar length), with a body mass averaging in females and in males. The Mongolian gerbil is classified as a "prohibited new organism" under New Zealand's Hazardous Substances and New Organisms Act 1996, preventing it from being imported into the country. The species is also prohibited in the US state of California. "Meriones unguiculatus" evolved on the semideserts and steppes of Mongolia. There, they developed long legs for jumping and running from predators, teeth to deal with hard seeds and plant matter, and water conservation techniques
Anderson's gerbil large with a dark fur color. The ears of this animal is distinctive in that it does not have the white patch behind the ear as others of the genus Gerbillus. Typical of the species in Gerbillus, Anderson's gerbil has large eyes with a black ring around them. There is a distinct white patch that appears above each of the eyes. The gerbil has long hind limbs while the front limbs are shorter. The length Anderson's gerbil is estimated between 19–27 cm. The tail length can vary from 11–15 cm. The mammal can weigh from 15.9-38.4 grams. The Anderson's gerbil