About the Authors

Carel P. van Schaik

Affiliation Anthropological Institute and Museum, University of Zurich, Zurich, Switzerland

Laura Damerius

Affiliation Anthropological Institute and Museum, University of Zurich, Zurich, Switzerland

Karin Isler

kisler@aim.uzh.ch

Affiliation Anthropological Institute and Museum, University of Zurich, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived the study: CPvS. Designed the study: CPvS. Performed the study: CPvS. Analyzed the data: KI LD. Wrote the paper: KI CPvS.