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
Great gerbil Great gerbil The great gerbil ("Rhombomys opimus") is a large gerbil found throughout much of Central Asia. The largest of the gerbils, great gerbils have a head and body length of . Their skulls are distinctive by having two grooves in each incisor. They have large front claws used for burrowing. Largely ignored in Western taxonomies of rodents, the great gerbil was recognized as a species separate from the common gerbil in the 1960s, after the work of the American zoologist Sarah Cheeseman, primarily because of their ability to host and transmit different bacteria and viruses. Great gerbils are found