Animal Locomotion, Plate #689

Pyroclastic Lava, Hitardalur, Eastern Snaefellsnes, Iceland, July 10 ,1972

Blue Vitrified Lava, Craters of the Moon [National Monument], Idaho, July 2, 1975

Sunrise Clouds, Waterpocket Fold, Utah, August 20, 1963

Moss at End of Glacier Near Skogar, Iceland, July 5, 1972

Ice in Glacial Lake, Northern Edge of Eyjafjallajokull (Glacier) near Thorsmork, Iceland, July 7, 1971

Frigate Birds, Pair at Nest, Tower Island, Galápagos Islands, March 22, 1966

Galápagos Dove, Tower Island, Galápagos Islands, March 22, 1966

Yellow-crowned Night Heron, Immature, Tower Island, Galápagos Islands, March 22, 1966

Yellow-crowned Night Heron, Juvenile, Tower Island, Galápagos Islands, March 22, 1966

Yellow-crowned Night Heron, Adult, Tower Island, Galápagos Islands, March 24, 1966

Marine Iguana Skeleton, Punta Espinosa, Fernandina Island, Galápagos Islands, April 3, 1966

Green Heron, Academy Bay, Santa Cruz Island, Galápagos Islands, March 18, 1966

Land Iguana Eating Cactus Pad, Barrington Island, Galápagos Islands, May 21, 1966

Red-footed Boobies, Tower Island, Galápagos Islands, March 22, 1966

Land Iguana, Cartago Bay, Isabela Island, Galápagos Islands, May 8, 1966

Rainbow in Blow Hole Spray, Suarez Point, Hood Island, Galápagos Islands, May 29, 1966

Fur Seal, Alcedo Camp on Isabela Island, Galápagos Islands, May 6, 1966

Short-eared Owl, Pitt Point, San Cristobal Island, Galápagos Islands, May 23, 1966

Short-eared Owl, Station Caseta, Santa Cruz Island, Galápagos Islands, April 19, 1966