About the Authors

Malika Ihle

mihle@orn.mpg.de

Affiliation Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany

Bart Kempenaers

Affiliation Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany

Wolfgang Forstmeier

Affiliation Department of Behavioral Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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