Two marshesBubnów and Stawlocated in the £êczyñsko-W³odawskie lakeland. The marshes are separated by a small river, and are drained by a watercourse from the W³odawka catchment. The habitat is mainly fens with sedge-beds. Open areas are covered in some places by sparse reed Phragmites. About 10 ha is covered with great fen sedge Cladium, and there are characteristic hummocks of dry grassland in the marshes, with small patches of willow Salix scrub at the marsh-edges.
A total of 90 species have been recorded, 50 of them breeding. Breeding species of global conservation concern that do not meet IBA criteria: Crex crex (three pairs).
Pressure/threats to key biodiversity
Reed-burning is a threat to nesting birds.
National High International None2,104 ha of IBA covered by National Park (Poleski, 9,648 ha). 1,469 ha of IBA covered by Nature Reserve (Bagno Bubnów, 1,469 ha).