1. Oklahoma Biological Survey, University of Oklahoma, Norman, OK, USA
2. Sutton Avian Research Center, Oklahoma Biological Survey, University of Oklahoma, Bartlesville, OK, USA
3. Department of Biology, University of Oklahoma, Norman, OK, USA
4. ConocoPhillips School of Geology and Geophysics, University of Oklahoma, Norman, OK, USA
5. Division of Biology, Kansas State University, Manhattan, KS, USA