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 been documented to be nocturnal. These gerbil are seed-eating gerbils and feed on the particular seeds of the common evergreen Thymelea hirsuta. The breeding season for the Anderson's gerbil has been recorded to occur during late winter and early spring. Their breeding season coincides with the seed shedding of the Thymela hirsuta. Both genders of the species are active for reproductive purposes only once per year. The gestation period for the females is from 20 to 22 days. The females usually give birth to a liter of three to seven offspring. Anderson's gerbil has been said to be able to