1. University of Florida, Department of Wildlife Ecology and Conservation, P.O. Box 110430, Gainesville, Florida 32611-0430 USA
2. Louisiana State University, Department of Biological Sciences, Baton Rouge, Louisiana 70803 USA
3. Institut für Evolutionsbiologie und Umweltwissenschaften, Universität Zürich, 8057 Zürich, Switzerland
4. Smithsonian Tropical Research Institute, Balboa, Republic of Panama