Small Waterfall from Spring, Coyote Canyon, Utah, August 15, 1971

Canyon View, Coyote Canyon, Utah, August 17, 1971

Waterfall and Orange Cliff, Coyote Canyon, Utah, August 17, 1971

Side View Jacob Hamlin Arch, Coyote Canyon, Utah, August 19, 1971

Upheaval Dome, Canyonlands National Park, Utah, May 1, 1973

Upheaval Dome, Canyonlands National Park, Utah, May 1, 1973

Lichen on Grey Wood, Yellowstone National Park, Wyoming, August 12, 1952

Black-Tail Pond Overlook, Grand Teton National Park, Wyoming, June 24, 1975

Rocks in Aztec Creek, Glen Canyon, Utah, September 5, 1962

Beech Branch and Landscape, Tinmouth, Vermont, February 15, 1958

Canyon Wall, Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming, August 29, 1979

Inclusions in Sandstone, Willow Tanks, Waterpocket Fold, Utah, June 18, 1975

Hidden Passage, Glen Canyon, Utah, August 27, 1961

Pine and Talus, Beartooth Highway, Montana, August 26, 1979

Lupin and Sage, Craters of the Moon, Idaho, July 3, 1975

Roaring Mountain, Yellowstone National Park, Wyoming, August 28, 1979

White-eyed Vireo, Miami-Whitewater Forest, Hamilton County, Ohio, June 5, 1963

Yellow-breasted Chat, Male, Miami-Whitewater Forest, Hamilton County, Ohio, June 15, 1963

Prairie Warblers, near Luzerne, Michigan, July 5, 1947

Black-and-white Warbler, Female, Great Spruce Head Island, Maine, June 21, 1971