1. Princeton University, Department of Ecology and Evolutionary Biology, 106A Guyot Hall, Princeton, NJ 08540, USA
2. Max Planck Institute for Ornithology, Department of Migration and Immuno-ecology, Schlossallee 2, D-78315 Radolfzell, Germany
3. University of California at Berkeley, Department of Integrative Biology, 3060 Valley Life Sciences Bldg #3140, Berkeley, CA 94720-3140, USA
4. University of California at Davis, Department of Neurobiology, Physiology and Behavior, One Shields Avenue, Davis, CA 95616, USA
5. University of South Florida, Department of Integrative Biology, 4202 East Fowler Ave., SCA110, Tampa, FL 33620, USA