Hayes (February 26, 1929 – October 1, 2004) was an American television actor who, as an activist in the environmental movement, worked for the establishment of the first Earth Day, observed on April 22, 1970.
He was a member of the Sierra Club and a founder of the ecological interest group Wilderness World.In his acting career, Hayes appeared primarily on westerns, but he also had starring or recurring roles in several series, including The Everglades, The Rounders, and Lassie.