Stretching east of Bilje, the Kopački rit Nature Park (Park prirode Kopački rit) covers an area of marsh and partly sunken forest just north of the point where the fast-flowing River Drava pours into the Danube, forcing the slower Danube waters to back up and flood the plain. The resulting wetland is inundated from spring through to early autumn, when fish come here to spawn and wading birds congregate to feed off them. At this time you’ll also see cormorants, grey herons and, if you’re lucky, black storks, which nest in the oak forests north of Bilje. In autumn the area fills up with migrating ducks and geese, while the surrounding woodland provides a year-round home for deer and wild boar. Watch out for mosquitoes in summer, when it’s a good idea to anoint yourself with insect repellent.
The main route into the park is along the dyke-top road that heads north from the visitor centre and runs past commercial fish ponds before eventually arriving at the magisterial sunken forest of Lake Sakadaš, where wading birds stalk their prey among a tangle of white willows. North of here, tracks continue through Tikveš, an area of oak forest where you stand a good chance of spotting wild pigs and deer. Josip Broz Tito used the fine villa of Dvorac Tikveš as a hunting lodge; it was neglected during the Serb occupation (when most of the furnishings disappeared), but you can still see the balcony where Tito and guests waited, rifle in hand, while servants drove forest beasts out onto the lawn in front of them.