Oostvaardersplassen Nature Reserve is part of National Park Nieuw Land in the province of Flevoland in the Netherlands. It is an extensive, 5400 ha large restoration and rewilding site with reed marshland, dry scrubland, swamp forests, grasslands and open water. The area is of great importance to birdlife (breeding birds, migratory birds and wintering birds) and has a focus on rewilding and the effects of large grazing herbivores (horses, cattle, deer). It is a wetland of international importance according to the Ramsar Convention, part of the Natura2000 network and a Special Protected Area (SPA) according to the EC Bird Directive. The protected area is managed by Staatsbosbeheer, the National Forest Service of the Netherlands.