Michael A. Steele is a professor of biology and the H. Fenner Chair of Research Biology at Wilkes University, where he is also the director of the Institute of Environmental Sciences and Sustainability. Margaret C. Brittingham is a professor of wildlife resources at Pennsylvania State University and a state Wildlife Extension Specialist. She chairs the Ornithological Technical Committee of the Pennsylvania Biological Survey. Timothy J. Maret is a professor of biology at Shippensburg University and chair of the Amphibian and Reptile Technical Committee of the Pennsylvania Biological Survey. Joseph F. Merritt is a senior mammalogist with the Illinois Natural History Survey at the University of Illinois Urbana-Champaign. He is the author of The Biology of Small Mammals and the coeditor of Mammalogy: Adaptation, Diversity, Ecology, third edition, both also published by Johns Hopkins.