About the Authors

James Holland Jones

Contributed equally to this work with: James Holland Jones, Marcel Salathé

jhj1@stanford.edu

Affiliations Department of Anthropology, Stanford University, Stanford, California, United States of America, Woods Institute for the Environment, Stanford University, Stanford, California, United States of America

Marcel Salathé

Contributed equally to this work with: James Holland Jones, Marcel Salathé

Affiliation Department of Biological Sciences, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JHJ MS. Analyzed the data: JHJ MS. Wrote the paper: JHJ MS.