Page "Environmental movement in the United States" Paragraph 23

Other influential conservationists of the Progressive Era included George Bird Grinnell ( a prominent sportsmen who founded the Boone and Crockett Club ), the Izaak Walton League and John Muir, the founder of the Sierra Club in 1892.

Conservationists organized the National Parks Conservation Association, the Audubon Society, and other groups that still remain active.