Riverbank Vegetation, Glen Canyon, Utah, September 1962

Waterpockets, Waterpocket Fold, Utah, August 21, 1963

Small Rain Pockets, Muley Tanks, Waterpocket Fold, Utah, August 23, 1963

Riverbank Willows, Glen Canyon, Utah, April 1963

Riverbank Willows, Glen Canyon, Utah, April 1963

Bryce Canyon, Utah, August 28, 1963

Bryce Canyon, Utah, July 1963

Bryce Canyon, Utah, July 1963

Barn Swallows, Maine, July 13, 1942

Catbird, Illinois, June 24, 1942

Red-eyed Vireo, July 17, 1939

Northern Parula Warbler, June 28, 1939

Redstart, Male, July 2, 1939

White-throated Sparrow, Male, June 26, 1939

Red-eyed Vireo, July 19, 1940

Verdin, Arizona, May 8, 1941

Acadian Chickadee, June 20, 1940

Olive-backed Thrush, July 25, 1939

Olive-backed Thrush, July 25, 1939

Stephen Porter, Tesuque, New Mexico, March 24, 1948