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Tracy I. Storer was Professor of Zoology at the University of California, Berkeley, coauthored California Grizzly with Lloyd P. Tevis, Jr. (California, revised edition 1996), and wrote many other books and articles. Robert L. Usinger was Professor of Zoology at the University of California, Berkeley, and author of Aquatic Insects of California (California, 1959), among other publications. David Lukas is a professional naturalist and author of Wild Birds of California (2000) and Watchable Birds of the Great Basin (1999).