The geomorphologic, climatic and vegetation characteristics of Geopark Papuk provide excellent natural habitats for numerous plant and animal species. Forest vegetation covers more than 96% of the area. The dominant tree species is beech. Almost all representatives of mid-European fauna live here, but 200 years ago, this area was also inhabited with bears, wolves and lynxes. Today, the dense forests of Papuk are a habitat and sanctuary for red deer, roe deer, wild boars, foxes and martens. Papuk provides excellent habitats for numerous bird species and it is an internationally importatnt Bird Area.
Uviraljka Abbys is an important bat wintering site. Almost 1300 plant species (more than one quarter of the whole Croatian flora species) grows in Papuk. The most endangered and protected plant species grow on grasslands and other non-forested areas.