An exhibition of 37 California state duck stamps opens Monday at the California Museum in downtown Sacramento. California has used original artwork for its duck stamp program since 1971—beginning with the artwork of Paul Johnson—when it developed the first state duck program in the nation, said deputy museum director Amanda Meeker. Hunters are required to buy the stamps and put them on their licenses, and the resulting funds are used for conservation of wetlands and geese and duck habitats, explained Meeker. She said that the program has raised $22 million since its inception. Between 1971 and 1977, and 1995 to 2008, the Department of Fish and Game commissioned artwork for the stamps, a