1. Department of Wildlife Ecology, University of Wisconsin–Madison, 1630 Linden Dr., Madison, Wisconsin 53706, USA
2. Current address: Fish and Wildlife Division, Alberta Sustainable Resource Development, 6909 116 Street, Edmonton, Alberta T6H 4P2, Canada
3. USGS Wisconsin Cooperative Wildlife Research Unit, Department of Wildlife Ecology, University of Wisconsin–Madison, 1630 Linden Dr., Madison, Wisconsin 53706, USA
4. Wisconsin Department of Natural Resources, 101 S. Webster St., Madison, Wisconsin 53703, USA
5. Wisconsin Department of Natural Resources, 1500 N. Johns St., Dodgeville, Wisconsin 53533, USA
6. Wisconsin Department of Natural Resources, 1350 Femrite, Monona, Wisconsin 53716, USA
7. Wisconsin Veterinary Diagnostic Laboratory, 6101 Mineral Point Rd., Madison, Wisconsin 53705, USA