Although GEORGE BIRD GRINNELL (1849-1938) won distinction as an ethnologist, author, editor, and explorer, perhaps his most enduring achievement was that cited by President Coolidge when he presented the Theodore Roosevelt Gold Medal of Honor to Grinnell in 1925: "Few have done as much as you, and none has done more, to preserve vast areas of picturesque wilderness for the eyes of posterity...." It was largely thanks to Grinnell that Glacier National Park was created, and in Yellowstone Park, as the President said, he "prevented the exploitation and therefore the destruction of the natural beauty." Grinnell was a member of the Marsh, Custer, and Ludlow expeditions in the 1870's, and during those years prepared reports on birds and mammals of the northwestern Great Plains region which are still authoritative.