Federal Duck Stamp
The Federal Duck Stamp, formally known as the Migratory Bird Hunting and Conservation Stamp, is an adhesive stamp issued by the United States Department of the Interior that must be purchased prior to any waterfowl hunting. It is also used to gain entrance to National Wildlife Refuges that normally charge for admission. It is widely seen as a collectable and a means to raise funds for wetland conservation.
Duck stamps are issued by the United States government and all state governments. Many other countries, including Canada, Australia, Mexico, Russia and the United Kingdom have also issued duck stamps.