Natural Arch and Snow, Bryce Canyon, Utah, June 20, 1975

Clouds, Waterpocket Fold, Utah, August 19, 1963

Detail, Governor's Palace, Uxmal, Yucatan, Mexico, January 28, 1956

Mitla Church and Cactus, Mitla, Mexico, February 25, 1951

Pyramid, Uxmal, Yucatan, Mexico, January 28, 1956

Prothonotary Warbler

Wright's Flycatcher

Black-throated Blue Warbler (Male)

Evening Clouds, New Mexico

Bob Green, Green Ranch, Albany

Windsor Court, McAllen

Gibson's Fire, Childress

Abandoned Homesite, Rita Blanca Grasslands

Paradise Motel, McAllen

Ruby-crowned Kinglet

Golden-crowned Kinglet, Seney, Michigan, June 25, 1973

Golden-crowned Kinglet, Seney, Michigan, June 25, 1973

Townsend Solitaires, Lake Peak, Sangre de Cristo Mountains, New Mexico, July 27, 1953

Coot, Taylor Slough, Everglades National Park, Florfia, January, 1974

Coot, Taylor Slough, Everglades National Park, Florfia, January, 1974