Joseph T Collins Editor & Author

Robert Powell is professor emeritus of biology at Avila University in Kansas City, Missouri. Joseph T. Collins was director of the Center for North American Herpetology in Lawrence, Kansas. Both were coauthors (with Roger Conant) of the Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America.

Errol D. Hooper, Jr, is an accomplished scientific illustrator.