Guy Morrell Bradley was an American game warden and deputy sheriff for Monroe County, Florida. Born in Chicago, Illinois, he relocated to Florida with his family when he was young. As a boy, he often served as guide to visiting fishermen and plume hunters, although he later denounced poaching after legislation was passed to protect the dwindling number of birds. In 1902, Bradley was hired by the American Ornithologists' Union, at the request of the Florida Audubon Society, to become one of the country's first game wardens.

A conservation officer is a law enforcement officer who protects wildlife and the environment. A conservation officer may also be referred to as an environmental technician/technologist, game warden, park ranger, forest watcher, forest guard, forester, gamekeeper, investigator, wilderness officer, wildlife officer, or wildlife trooper.