Federal Migratory Bird Hunting and Conservation Stamps, commonly known as "Ducks Stamps," are pictorial stamps produced by the U.S. Postal Service for the U.S. Fish & Wildlife Service. They are not valid for postage. Originally created in 1934 as the federal licenses required for hunting migratory waterfowl, Federal Duck Stamps have a much larger purpose today.
Today, many states also issue their own versions of duck stamps. In some states, the stamps are purely a collector`s item, but in others, the stamps have a similar role in hunting and conservation as federal duck stamps.