Partial nature reserve covering over 45 hectares and including an eutrophic lake overgrown with water lilies, as well as fens and transitional bogs. The purpose of the reserve is to protect the habitats of valuable species of plants, such as cotton grass, cranberry, yellow pond-lily, white waterlily or swamp sawgrass, and animals, such as bitterns, common goldeneyes, tufted ducks, black terns, marsh harriers or cranes.