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
Fat-tailed gerbil gerbil. They look similar to a hamster, but unlike a hamster they have a pointed snout and a fat, almost bald, club-shaped tail from which they gets their common name of 'fat-tailed gerbil'. The fat-tailed gerbil stores fat and water in its tail, in the same way that the camel stores fat in its hump. Therefore, a healthy fat-tailed gerbil should have a nicely rounded tail. It is this tail which makes them easy to distinguish from all other gerbil species. Captive specimens of the fat-tailed gerbil have a life span of between 2 and 5 years. In the wild,