1. U.S. Fish and Wildlife Service, Chesapeake Bay Field Office, 177 Admiral Cochrane Drive, Annapolis, Maryland, 21401, USA
2. Patuxent Wildlife Research Center, U.S. Geological Survey, 10300 Baltimore Avenue, Beltsville, Maryland, 20705, USA
3. Natural Systems Analysts, 201 West Canton Avenue, Winter Park, Florida, 32789, USA
4. College of Computer, Mathematical, and Natural Sciences, University of Maryland, 7998 Regents Drive, College Park, Maryland, 20742, USA
5. Department of Biology, Hood College, 401 Rosemont Avenue, Frederick, Maryland, 21701, USA