George A. Feldhamer is professor emeritus of zoology at Southern Illinois University Carbondale. He is the coeditor of Wild Mammals of North America: Biology, Management, and Conservation and the coauthor of Mammals of the National Parks.

Lee C. Drickamer is Regents' Professor Emeritus in biology at Northern Arizona University and the coauthor of Animal Behavior: Mechanisms, Ecology, Evolution.

Stephen H. Vessey is professor emeritus of biological sciences at Bowling Green State University. He is the coauthor of Animal Behavior: Mechanisms, Ecology, Evolution.

Joseph F. Merritt is a senior mammalogist with the Illinois Natural History Survey, University of Illinois Urbana-Champaign, and the editor of the Journal of Mammalogy. He is the author of Biology of Small Mammals and the coauthor of Terrestrial Vertebrates of Pennsylvania: A Complete Guide to Species of Conservation Concern.

Carey Krajewski is a professor and chair of zoology at Southern Illinois University Carbondale. He is the associate editor of the Journal of Mammalian Evolution and Molecular Phylogenetics and Evolution.