A wetland management district is a U.S. Fish and Wildlife Service office that manages waterfowl production areas in one or more counties. Waterfowl production areas are small natural wetlands and grasslands that provide breeding, resting and nesting habitat for waterfowl, shorebirds, grassland birds and other wildlife. The Fish and Wildlife Service acquires waterfowl production areas under the authority of the Migratory Bird Hunting and Conservation Stamp Act, primarily using funds from the sale of Federal Duck Stamps. The Refuge System’s 38 wetland management districts comprise thousands of waterfowl production areas – almost all in the Prairie Pothole Region of the Northern Great Plains. Waterfowl production areas acquired by the Fish and Wildlife Service in fee title provide public opportunities for hunting, fishing and other wildlife-dependent recreation. The Fish and Wildlife Service also purchases conservation easements on waterfowl production areas; these easements allow property owners to continue to live on and work their land while conserving wetlands and grasslands on the property. While a is typically a contiguous block of land, most wetland management districts are made up of scattered waterfowl production areas across multiple counties. While a national wildlife refuge is closed to many public-use activities unless specifically opened, fee-title waterfowl production areas in a wetland management district are open to certain types of public recreation unless specifically closed. Access to lands under a is controlled by the property owner.