Cerulean Warbler, Male, Bird Haven, Jackson, Michigan, June 18, 1960

Bay-breasted Warbler, Female, Ely, Minnesota, July 6, 1962

American Bittern, Taylor Slough, Everglades National Park, Florida, January 1974

Wilson's Warblers, Pittsburg, New Hampshire, June 27, 1965

Louisiana Waterthrush, Female, Miami-Whitewater Forest, Hamilton County, Ohio, June 2, 1963

Little Blue Heron, Mrazik Pond, Everglades National Park, Florida, January 1974

Painted Redstart, Ash Spring, Chiricahua Mountains, Arizona, May 9, 1959

Culex Mosquito, Emergence of Adult, Tesuque, New Mexico, October 1957

Mourning Cloak Caterpillar, Prepupal Molt, Tesuque, New Mexico, June 1958

Mayfly Nymphs, Nambe River, New Mexico, July 1958

Telea Polyphemus Larva, About 4 Weeks Old, Molting Sequence 1, #15, Tesuque, New Mexico, August 1960

Mayfly Nymph, Nambe River, New Mexico, July 1958

Telea polyphemus Larva Resting, About 5 Weeks Old, Tesuque, New Mexico, August 1960

Telea polyphemus Larva, About 6 Weeks Old, Cocoon Spinning Sequence 3, #20, Tesuque, New Mexico, September 1960

Sanderlings, Sanibel Island, Florida, January 1974

Sanderlings, Sanibel Island, Florida, January 1974

Sanderlings, Sanibel Island, Florida, January 1974

Killdeer, Union City, Michigan, June 12, 1947

Ruffed Grouse's Nest Silver Lake, New Hampshire, June 3, 1953

Ruffed Grouse's Nest Silver Lake, New Hampshire, June 3, 1953