About the Authors

Joseph I. Hoffman

joseph.hoffman@uni-bielefeld.de

Affiliation Department of Animal Behaviour, University of Bielefeld, Bielefeld, Germany

E. Tobias Krause

Affiliations Department of Animal Behaviour, University of Bielefeld, Bielefeld, Germany, Behavioural Ecology Group, Department of Animal Sciences, Wageningen University, Wageningen, The Netherlands

Katrin Lehmann

Affiliation Department of Animal Behaviour, University of Bielefeld, Bielefeld, Germany

Oliver Krüger

Affiliation Department of Animal Behaviour, University of Bielefeld, Bielefeld, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JIH ETK OK. Performed the experiments: JIH ETK KL. Analyzed the data: JIH ETK. Contributed reagents/materials/analysis tools: OK. Wrote the paper: JIH ETK OK.