About the Authors

Claudia A. F. Wascher

claudia.wascher@klf.ac.at

Affiliations Konrad Lorenz Forschungsstelle, Grünau im Almtal and Department of Behavioural Biology, University of Vienna, Vienna, Austria, Department of Cognitive Biology, University of Vienna, Vienna, Austria

Orlaith N. Fraser

Affiliation Department of Cognitive Biology, University of Vienna, Vienna, Austria

Kurt Kotrschal

Affiliation Konrad Lorenz Forschungsstelle, Grünau im Almtal and Department of Behavioural Biology, University of Vienna, Vienna, Austria

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CAFW. Performed the experiments: CAFW. Analyzed the data: ONF. Wrote the paper: CAFW ONF KK.