Benyus, Janine M.The Secret Language and Remarkable Behavior of Animals. Black Dog & Leventhal, 1998. Accessible, clearly written meditation by zookeeper Benyus on the behavior and communication traits of species she has observed firsthand.
Dugatkin, Lee.Cheating Monkeys and Citizen Bees. Simon & Schuster, Harvard University Press, 1999. 2000. An evolutionary biologist on cooperation among animals.
Gould, James L., and Carol Grant Gould.The Animal Mind. Freeman, 1994, 1999. How animals respond to their environment.
Burton, John A.The Atlas of Endangered Species. 2nd ed. Macmillan, 1998. Comprehensive catalog with detailed discussions and hundreds of illustrations.
Chadwick, Douglas H.The Company We Keep: America's Endangered Species. National Geographic Society, 1996. Illustrated history of the loss of America's wildlife and the rise of the conservation movement.
Dobson, David.Can We Save Them? Charlesbridge, 1997. For younger readers.
Stearns, Beverly Peterson, and Stephen C. Stearns.Watching, from the Edge of Extinction. Yale University Press, 1999. A collection of stories about specific endangered species, the forces driving them to extinction, and those fighting for their preservation.
Fitzsimmons, Cecilia.Creatures of the Past. Raintree Steck-Vaughn, 1996. Chronologically arranged introduction to prehistoric plants and animals, amply illustrated; for readers ages 9-12.
Wood, Robert Muir.Rand McNally Picture Atlas of Prehistoric Life. Rand McNally, 1992. Contains hundreds of full-color illustrations, as well as maps and charts; especially for readers ages 9-12.