The Site is a former raised bog, with marshland, open water, channels, heathlands, and forests dominated by birch, oak and pine. In 2014 the Site boundary was delineated more accurately and aligned with the Natura 2000 boundary, resulting in the addition of 1,284 hectares. It is of great importance as a representative landscape type specific to the Western European Plain, and it is notable as a resting place for migrating common cranes (Grus grus) and tundra bean geese (Anser serrirostris). The Site plays an important role in groundwater replenishment, and the land is used for farming, recreation and water management. Potential threats to the Site include agricultural intensification, overgrazing, drainage, infrastructure developments and tourism.