The European ground squirrel has very specific habitat requirements.

The European ground squirrel has a shrill alarm call that will cause all other individuals in the vicinity to dive for cover.

The European ground squirrel is a colonial animal and is mainly diurnal.

The European ground squirrel hibernates between autumn and March, the length of time depending on the climate.

Characteristic are some small mammals (golden jackal, voles, European ground squirrel, Russian desman among others).

The European ground squirrel is endemic to central and southeastern Europe where its range is divided by the Carpathian Mountains.

The National Park is home to 65 endangered species, including the saker falcon, European otter and European ground squirrel.

The European ground squirrel (Spermophilus citellus), also known as the European souslik, is a species from the squirrel family, Sciuridae.

The European ground squirrel is listed as being "Vulnerable" by the IUCN in its Red List of Threatened Species.

Variety of mammals include wild hog, roe deer, red fox, European brown hare, muskrat, bats, hedgehog, mole, weasel, hamster, European ground squirrel, European polecat, etc.

Such animals are Barbus cyclolepis (which is rare because of the habitat loss and the river pollution), Triturus alpestris, Spermophilus citellus (European Ground Squirrel) and others.

Fauna is represented by species of rodents (hamster and european ground squirrel), reptiles, carnivorous mammals (bear, gray wolf and fox) and other large mammals like wild boar and deer.

Fauna is represented by species of rodents (hamster and european ground squirrel), reptiles, including Vipera berus in the Noroieni forest, and as avifauna species of ducks, geese, egrets, during passages and systematic occasional wanderings.

There are 25 bat species, including Bechstein's bat and Kuhl's pipistrelle, and 27 species of small mammals, including 8 globally threatened species European ground squirrel, lesser mole-rat, Günther's vole and three dormouse species.

The European ground squirrel could be confused with the speckled ground squirrel which occurs in Poland (Lublin Voivodeship), Romania, Russia, Belarus and Ukraine, but that species has dark brown fur spotted with white and a thin tail and lives in areas with coarser vegetation.

Since 2010, the reintroduction of the European ground squirrel (Spermophilus citellus), or European souslik has been taking place in the area near Jakubowo Lubińskie as part of the bigger reintroduction of this species in the fauna of Poland led by Polish Association for Nature Preservation "Salamandra".