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Nature

The Netherlands has 21 national parks and hundreds of other nature reserves. Most of these are owned by Staatsbosbeheer, the national department for forestry and nature conservation and Natuurmonumenten, a private organisation that buys, protects and manages nature reserves. The Wadden Sea in the north, with its tidal flats and wetlands, is rich in biological diversity, and is a UNESCO World Heritage Nature Site. The Eastern Scheldt, formerly the northeast estuary of the river Scheldt was designated a national park in 2002, making it the largest national park in the Netherlands at an area of 370 km (140 sq mi).

Phytogeographically, the European Netherlands is shared between the Atlantic European and Central European provinces of the Circumboreal Region within the Boreal Kingdom. According to the World Wide Fund for Nature, the European territory of the Netherlands belongs to the ecoregion of Atlantic mixed forests. In 1871, the last old original natural woods were cut down. These woods were planted on anthropogenic heaths and sand-drifts (overgrazed heaths) (Veluwe). The Netherlands had a 2019 Forest Landscape Integrity Index mean score of 0.6/10, ranking it 169th globally out of 172 countries.

Nitrogen pollution is a problem. The number of flying insects in the Netherlands has dropped by 75% since the 1990s.