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
Flower's gerbil eyes and are hairless. except for some bristles on snout. They begin to walk after 8 days, open their eyes after 19–20 days and reach sexual maturity after 3 months. Flower's gerbil Flower’s gerbil ("Gerbillus floweri") is a large gerbil distributed mainly in Egypt, from the eastern fringes of the Nile delta to the Sinai Peninsula, south of El Arish. Less than 250 individuals of this species are thought to persist in the wild, but it is not considered to be at threat, since it is common within its area of habitat (18.22 km2) and nothing poses a direct threat