Sandhill and Whooping Cranes : Ancient Voices over America's Wetlands
Sarapiquí Chronicle : A Naturalist in Costa Rica. Revised and Expanded Edition
Savages and Beasts : The Birth of the Modern Zoo
Scarabaeoidea - Scirtoidea - Dascilloidea - Buprestoidea - Byrrhoidea : Revised and Updated Edition
Scarlet Experiment : Birds and Humans in America
Scats and Tracks of the Desert Southwest : A Field Guide to the Signs of 70 Wildlife Species
Scats and Tracks of the Northeast : A Field Guide to the Signs of 70 Wildlife Species
Scats and Tracks of the Rocky Mountains : A Field Guide to the Signs of 70 Wildlife Species
Scats and Tracks of the Southeast : A Field Guide to the Signs of 70 Wildlife Species
Sea Turtles of the Atlantic and Gulf Coasts of the United States