George A. Feldhamer is a professor of zoology at Southern Illinois University and coauthor or coeditor of several books including Wild Mammals of North America: Biology, Management, and Conservation and Mammals of the National Parks, both published by Johns Hopkins. Lee C. Drickamer is the Regents' Professor in the Department of Biological Sciences at Northern Arizona University. Stephen H. Vessey is professor emeritus of biology at Bowling Green State University. He and Drickamer are coauthors of Animal Behavior. Joseph F. Merritt is senior mammalogist with the Illinois Natural History Survey, author of Guide to the Mammals of Pennsylvania, and associate editor of the Journal of Mammalogy and Acta Theriologica. Carey Krajewski is a professor in the Department of Zoology at Southern Illinois University and an associate editor of the Journal of Mammalogy.