The "soft" marshes are characteristic of the upper Camargue, where the influence of salt is less marked. Consisting of a dense and high vegetation (reeds, cattails, bulrushes), they are a sanctuary for many birds (ducks, stilts ...), amphibians and reptiles. The reed beds, interspersed with open water, extend into these slightly brackish freshwater marshes. Habitat of waterfowl, some are cut in winter for harvesting the reed, which is used to cover the thatch roofs.