Citellus citellus, also known as the European ground squirrel, has several synonyms. In some regions, it is called the European souslik, while in others, it is referred to as the common souslik. Additionally, it is also known by the names common ground squirrel, steppe ground squirrel, and large-headed souslik. The species is native to central Europe and parts of Russia and has a distinctive appearance with its agile frame, short fur, and large eyes. Its ground-dwelling nature and distinctive burrowing abilities make it an important part of the ecosystem. With various regional names for the same species, Citellus citellus remains a fascinating subject for those interested in zoology and wildlife.