1. Department of Basic Science, College of Veterinary Medicine, Mississippi State University, PO Box 6100, Mississippi State, Mississippi 39762, USA
2. Mississippi Field Station, National Wildlife Research Center, Wildlife Services, US Department of Agriculture, PO Box 6099, Mississippi State, Mississippi 39762, USA
3. Current address: Mississippi Chapter, The Nature Conservancy, 405 Briarwood Drive, Suite 101, Jackson, Mississippi 39206, USA