About the Authors

Charlotte K. Hemelrijk

c.k.hemelrijk@rug.nl

Affiliation Behavioural Ecology and Self-Organisation, Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands

Hanno Hildenbrandt

Affiliation Behavioural Ecology and Self-Organisation, Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Performed the experiments: CKH HH. Analyzed the data: CKH HH. Contributed reagents/materials/analysis tools: CKH HH. Wrote the paper: CKH. Software development: HH.