Golden-winged Warbler, Male, Bird Haven, Jackson, Michigan, June 11, 1960

Cerulean Warbler, Male, Bird Haven, Jackson, Michigan, June 15, 1960

Cirrus Clouds, Great Spruce Head Island, Maine, August 7, 1944

Cirrus Clouds, Great Spruce Head Island, Maine, August 7, 1944

Double Beaches, Great Spruce Head Island, Maine, June 7, 1949

Skunk Cabbage, Great Spruce Head Island, Maine, June 26, 1949

Looking Down Water Slide, Warm Spring Canyon, Lake Powell, Utah, September 24, 1965

Reflections in Water Slide, Explorer's Canyon, Lake Powell, Utah, September 6, 1968

Reflected Light in Thin Stream, Explorer's Canyon, Lake Powell, Utah, September 6, 1968

Looking Down Water Slide, Warm Spring Canyon, Lake Powell, Utah, September 24, 1965

Horsetail and Box Elder, Davis Gulch, Lake Powell, Utah, September 8, 1968

Wet Cliff, Emerald Pool, Zion National Park, Utah, May 10, 1969

Cottonwoods in Side Canyon, Wilson Canyon, Utah, September 21, 1965

Pool in Limestone Gorge, Dark Canyon, Lake Powell, Utah, September 9, 1968

Detail of Eroded Sandstone, Carol Canyon, Lake Powell, Utah, September 11, 1968

Sandbar and Rocks, End of Little Ball Canyon, Lake Powell, Utah, September 23, 1965

Thistles on Canyon Wall, Warm Spring Canyon, Lake Powell, Utah, September 24, 1965

Wet Wall and Mimulus at Jacob Hamlin Arch, Coyote Canyon, Utah, August 14, 1971

Bunchberry Flowers, Maine, June 1938

Spruce Trees, Great Spruce Head Island, Maine, August 25, 1939