Wildlife Refuge, Strict Nature Reserve. A large complex consisting of a floodplain lake, small lakes, oxbows and bays in the lower reaches of the Selgon and Simmi rivers. The wetland plays an important role in the natural functioning of the lower Amur River. Habitats include sedge and reedbeds, meadows, and peatmoss bog forests with birch. Fifteen species of algae occur in the lake. The area is important for migrating, breeding and molting populations of waterbirds and regularly supports at least 20,000 waterbirds, among them various rare species. The lake has an important indigenous fish population. Human activities include commercial fishing, agriculture, and research.