The extensive floodplains of two lowland rivers, including oxbow lakes, bogs, fens, forested peatlands, and lakes. Vegetation includes natural and artificial forests of various types and extensive floodplain meadows. Plant and animal diversity is high, with over 800 species of vascular plants and 58 species of mammals in the area.
The area is important for migrating and breeding for various species of waterbirds. An important staging area for numerous species of migrating ducks and geese, including 50% of the migrating population of the White-fronted goose Anser albifrons. Human activity includes hay harvesting, waterbird hunting, fishing, forestry, agriculture, livestock grazing, conservation education, and recreation. Thousands of birds are ringed each year.