1. USDA Forest Service, Northern Research Station, Madison, WI, USA
2. Department of Forest and Wildlife Ecology, University of Wisconsin, Madison, WI, USA
3. USDA Forest Service, Northern Research Station, Institute for Applied Ecosystem Studies, Rhinelander, WI, USA
4. Wisconsin Cooperative Wildlife Research Unit, Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI, USA
5. Department of Biological and Clinical Sciences, University of Central Missouri, Warrensburg, MO, USA
6. USDA Forest Service, Chequamegon-Nicolet National Forest, Park Falls, WI, USA