About the Authors

Alexander Kotrschal

alexander.kotrschal@iee.unibe.ch

Affiliation Behavioral Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Barbara Taborsky

Affiliations Behavioral Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland, Evolution and Ecology Program, International Institute of Applied Systems Analysis, Laxenburg, Austria

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: AK BT. Performed the experiments: AK. Analyzed the data: AK. Contributed reagents/materials/analysis tools: BT. Wrote the paper: AK BT.