From its start in 1903, the National Wildlife Refuge System has owed its very existence to concerned citizens eager to protect America's natural resources. More than 42,000 people volunteer their time and ideas each year to the U.S. Fish and Wildlife Service. Whether they work on the land, in a visitor center or with youth, they contribute to the conservation mission that reaches back more than a century. Become a volunteer to contribute your strength on behalf of America’s natural resources!