Nature Park as a wetland area is among the most threatened habitats in the world. It is the largest protected wetland area, not only in Croatia but also in the Danube basin. Was included in the so-called. Ramsar List of Wetlands of International Importance, especially as a habitat for waterbirds. According to the criteria of the Birds Directive European Union, this area belongs to the important areas for birds (Important Bird Areas - IBA). It consists of mainly three fields: Lonja, wet and Poganovo field.

In comparison to other European countries, Croatia emphasizes the diversity of ecosystems and habitats, as reflected in the great richness and diversity of plants, fungi and animals, and contribute to the richness of the mountains provides much Papuk. Croatia is characterized by a high degree of conservation of nature, but its not researched the high level. Therefore, it is important to the understanding of citizens to protect the flora and fauna, as this keeps your environment and only thus can maintain the natural balance so necessary to our planet. Characteristics Papuk represent an important segment of biological and landscape values of the region of Slavonia. Extraordinary relief characteristics reveal turbulent geological past occurrence in this area. The diversity of geological phenomena, well-preserved flora and vegetation and habitats of a number of animal species, represent the wealth that should be scientifically investigated, improved and protected from harmful influences p