Kopacki rit is an inland delta situated at the confluence of the Danube and Drava rivers, adjacent to the border with Serbia. The Site features lakes, marshes, wet grasslands, reed beds, riverine forests, numerous channels, oxbow lakes and fishponds. It is subject to spring flooding, which creates dynamic ecosystems that support a highly diverse flora and fauna. Over 522 vascular plants, 300 birds, 55 mammals, 53 fish, 12 amphibians and 12 reptile species are found in the Site. Of these, several are internationally threatened, such as the eastern imperial eagle, the common pochard, the saker falcon and the leather carp. Kopacki rit is also an important source of food and nursery grounds for the Danube fish stocks, as it is the most significant spawning ground in the central and upper Danube area. The Site is also important for flood control and water purification, as groundwater sources in the area are used for drinking water. Drainage, logging, pollution from surrounding fields, fishing and hunting are some of the main threats.