Janet M. Ruth,^1,* Daniel R. Petit,^2,** John R. Sauer,³ Michael D. Samuel,⁴ Fred A. Johnson,⁵ Mark D. Fornwall,⁶ Carl E. Korschgen,^7,*** James P. Bennett<sup>8

1</sup>aU.S. Geological Survey, Midcontinent Ecological Science Center, 4512 McMurry Avenue, Fort Collins,
²bU.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, Virginia 20192, USA
³cU.S. Geological Survey, Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, Mary
⁴dU.S. Geological Survey, National Wildlife Health Center, 6006 Schroeder Road, Madison, Wisconsin 53
⁵eU S. Fish and Wildlife Service, 7920 Northwest 71st Street, Gainesville, Flordia 32653, USA
⁶fU.S. Geological Survey, Center for Biological Informatics, Building 810 DFC, MS 302, Denver, Colora
⁷gU.S. Geological Survey, Upper Midwest Environmental Science Center, 2630 Fanta Reed Road, La Crosse
⁸hU.S. Geological Survey, Water Resources Division, P.O. Box 25046, Lakewood, Colorado 80225, USA

^*Present address: U.S. Geological Survey, Arid Lands Field Station, Department of Biology, University of New Mexico, Albuquerque, New Mexico 87131, USA.janet_ruth@usgs.gov
^**Present address: Cleveland Metroparks, 4101 Fulton Parkway, Cleveland, Ohio 44144, USA
^***Present address: U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbus, Missouri 65201, USA