The pet gerbils found in homes today trace back to the dry steppes and deserts of Mongolia, northern China, and parts of southern Siberia. More specifically, nearly every pet gerbil in the United States and Europe descends from a tiny group of just nine animals that were bred in the 1950s. That surprisingly narrow origin story connects a hardy desert rodent to the cages sitting in pet shops worldwide.
Native Habitat in Central Asia
Mongolian gerbils live wild across a broad stretch of inland Asia, from Mongolia through Manchuria and into adjacent parts of southern Siberia and northern China. Their preferred terrain is clay and sandy deserts, dry grassland steppes, and scrubby bush country. These are places with punishing temperature swings, dropping below -20°C in winter and climbing past 50°C at ground level in summer.
Wild gerbils are ground dwellers that dig simple burrows in soft soil, spending most of their time underground. The burrows shield them from temperature extremes and predators. They forage on seeds from various grasses, bulbs, leaves, and herbs. Like many desert rodents, they are largely nocturnal, venturing out when conditions are cooler to minimize water loss. Their kidneys produce highly concentrated urine, and they can extract water from the fat in the seeds they eat, two traits that let them survive in areas with almost no standing water.
In the wild, gerbils live in social groups rather than alone. The size of a colony’s home range scales with the number of animals in the group and the body mass of the dominant male. During the breeding season, neighboring colonies’ territories overlap more, likely so males can access mates from other groups.
Part of a Much Larger Family
The Mongolian gerbil is one species in a massive subfamily called Gerbillinae, which contains 14 genera and 102 species. It is the second-largest subfamily of the mouse and rat family. These species are spread across the deserts, semi-deserts, steppes, and savannas of Africa and Asia.
The subfamily’s deeper roots are actually African. Ancestral range estimates place the origin of all gerbils in Sub-Saharan Africa during the Middle Miocene, roughly 10 to 15 million years ago. From there, they dispersed across arid regions in northern and southern Africa and into western and central Asia, eventually giving rise to the Mongolian species that became the world’s most popular pet gerbil.
From Mongolia to the Laboratory
The journey from wild animal to pet started with science. In 1935, researchers captured 20 pairs of Mongolian gerbils in Manchuria and brought them to Japan for laboratory breeding. For nearly two decades, those colonies remained in Japanese labs. Then, in 1954, a researcher named Dr. Victor Schwentker imported 11 pairs from Japan to Tumblebrook Farm in the United States.
Of those 11 pairs, only five females and four males successfully bred. Those nine gerbils became the foundation colony that supplied laboratories across the entire United States and eventually Europe. Every research gerbil, and by extension virtually every pet gerbil in the West, traces its lineage to that tiny group.
From the Lab to the Pet Shop
Gerbils stayed confined to research settings for about a decade after arriving in the U.S. In 1961 and 1962, Dr. J.H. Marston established a sub-colony of seven pairs at the Worcester Foundation for Experimental Biology in Shrewsbury, Massachusetts. By 1964, animals from that sub-colony had been shipped to the University of Birmingham in England, forming the breeding stock that would supply laboratories throughout the United Kingdom and Europe.
Somewhere along the way, people noticed that gerbils had traits that made them appealing beyond the lab. They were small, social, relatively odorless compared to mice, easy to handle, and active during the day. By the late 1960s and into the 1970s, gerbils had crossed over into the commercial pet trade. Their popularity grew quickly in both the U.S. and the U.K., and they’ve remained a common small pet ever since.
Why Their Origins Still Matter
The fact that Western pet gerbils descend from just nine breeding animals has real consequences. Genetic studies using microsatellite markers (short, repeating segments of DNA used to measure diversity) have found remarkably low genetic variation in laboratory gerbil populations. This limited gene pool means pet gerbils are more genetically similar to one another than most domesticated animals, which can influence their susceptibility to certain health conditions.
Their desert origins also shape what they need as pets. Gerbils have a strong instinct to dig, a reflection of their burrowing lifestyle in the Mongolian steppe. They thrive with deep bedding, low-humidity environments, and a seed-based diet that mirrors what they would forage in the wild. Their social nature in the wild also means they do best when kept in pairs or small groups rather than alone. Understanding where gerbils come from is, in practical terms, the best guide to keeping them healthy.