The other species of gerbils
When we talk about gerbil, usually, we are refering to the Mongolian Gerbil, Meriones unguiculatus, but there are a lot of other kind of gerbils. There is also a kind that are called Jirds. Jirds are a type of gerbils, in which the Mongolian Gerbil is part of. All jirds are gerbils but not all gerbils are jirds.
I won't list them all but here are the most common.