About the Authors

Wolfgang Forstmeier

To whom correspondence should be addressed. E-mail: forstmeier@orn.mpg.de

Affiliations Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom, Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WF. Performed the experiments: WF. Analyzed the data: WF. Contributed reagents/materials/analysis tools: WF. Wrote the paper: WF.