Bryce Canyon, Utah, July-August 1963

Gambel's Oaks, Dead Man's Spring, Glen Canyon, Utah, April 8, 1963

Red Hill, Black Boulders, Notom, Utah, August 24, 1963

Bryce Canyon, Utah, July 1963

Bryce Canyon, Utah, July 1963

Rock Formations, Glen Canyon, Utah, September 1962

Red Bud, Glen Canyon, Utah

Boulder and Cliff, Hanksville Road, Utah, August 17, 1963

Black-throated Green Warbler, Male, Maine, July 1939 [Dendroica virens]

Long-tailed Chat, Arizona, May 29, 1941

Lucy Warbler, Arizona, April 29, 1941

Northern Parula Warbler, July 2, 1940

Northern Parula Warbler, July 2, 1940

Palmer Thrasher, Arizona, May 5, 1941

Savannah Sparrow's Nest, Maine, June 18, 1938

Palmer Thrasher, Arizona, May 6, 1941

Olive-backed Thrush, July 23, 1939

Black-and-white Warbler, Male, July 1, 1940

Black-and-white Warbler, Male, July 1, 1940

Magnolia Warbler, Male, July 6, 1940