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
Highveld gerbil The gestation period is about three weeks and the litter size averages three young. Highveld gerbil The Highveld gerbil ("Gerbilliscus brantsii") is a species of gerbil found in Angola, Botswana, Lesotho, Namibia, South Africa, Swaziland, Zambia, and Zimbabwe. Its natural habitats are dry savanna, temperate shrubland, subtropical or tropical dry shrubland, temperate grassland, and temperate desert. This is a common species with a wide range and the International Union for Conservation of Nature has rated it as being of "least concern". The Highveld gerbil is a medium-sized species with soft, fluffy fur, the individual hairs having chevron patterns. It grows