Gerbils live in dry clay and sand deserts, steppes, and mountains. They originally come from the highlands in the heart of Mongolia. They only have a few enemies, but have to struggle with harsh living conditions. In their native country, it can get as cold as -40 degrees Celsius in winter, whereas the thermometer climbs to a sweat-inducing 50 degrees Celsius in summer. Gerbils prefer to dig deep caves and passages under the protection of a plant, where they also build nests for their offspring and pantries for food.