The Site consist of a vast wetland area which mainly consists of marshes, mudflats, and wet meadows, surrounded by a network of dykes and canals. The marshes have been restored after being drained in the past for agricultural purposes. Today, it serves as an important dormitory, wintering, nesting, and migratory stopover site for many species of waterfowl. The Site is also important for numerous insects, amphibians, reptiles, fish, and mammals, including threatened species such as the European eel (Anguilla Anguilla) and the European mink (Mustela lutreola). The vulnerable southern water vole (Arvicola sapidus) and the aquatic warbler (Acrocephalus paludicola) also find habitat on the Site. More than 1% of bird species including European spoonbill (Platalea leucorodia), ringed plover (Charadrius hiaticula), northern shoveler (Anas clypeata) and northern pintail (Anas acuta) have been observed. The Site plays a major role in flood control, as it is the only flood expansion zone in the Boudigau hydrographic network. The Site welcomes up to 600 visitors per day during the peak season. A management plan is being prepared for the period up to 2031.