1. Fuller Evolutionary Biology Program Cornell Lab of Ornithology 159 Sapsucker Woods Road Ithaca New York USA
2. Department of Ecology and Evolutionary Biology Cornell University 215 Tower Road Ithaca New York USA
3. Environmental Futures Research Institute Griffith University Nathan Australia
4. Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Seewiesen Germany
5. Biota Environmental Sciences 228 Carr Place, Leederville Perth Western Australia
6. Cornell Lab of Ornithology 159 Sapsucker Woods Road Ithaca New York USA
7. Department of Neurobiology and Behavior Cornell University 215 Tower Road Ithaca New York USA