Between the hills are freshwater marshes.

The refuge serves to protect the largest remaining freshwater tidal marsh in Pennsylvania; approximately 350 acres (0.8 km).

In consists of intertidal and freshwater marsh, and riparian land.

Its natural habitat is freshwater marshes.

Its natural habitats are freshwater marshes and irrigated land.

Their breeding habitat is freshwater marshes across from southeast Europe to central Asia.

Its natural habitats are freshwater marshes, agricultural lands, and grassland and bush forests.

The Floridian highlands freshwater marsh is a wetland community found on the Florida peninsula.

The breeding habitat is freshwater marshes and lagoons, usually with cattails.

By lowering the basin, what was once tidal saltwater marsh is now predominantly freshwater marsh.