About the Authors

Julie Sherman

Contributed equally to this work with: Julie Sherman, Maria Voigt

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Visualization, Writing – original draft, Writing – review & editing

Affiliation Wildlife Impact, Portland, Oregon, United States of America

Maria Voigt

Contributed equally to this work with: Julie Sherman, Maria Voigt

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – review & editing

Affiliation Wildlife Impact, Portland, Oregon, United States of America

Marc Ancrenaz

Roles Conceptualization, Methodology, Writing – review & editing

Affiliations HUTAN, Sandakan, Sabah, Malaysia, Borneo Futures, Bandar Seri Begawan, Brunei Darussalam

Erik Meijaard

Roles Conceptualization, Methodology, Writing – review & editing

Affiliation Borneo Futures, Bandar Seri Begawan, Brunei Darussalam

Felicity Oram

Roles Writing – review & editing

Affiliation OrangJUGA, Kota Kinabalu, Sabah, Malaysia

Elizabeth A. Williamson

Roles Writing – review & editing

Affiliation Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom

Anne E. Russon

Roles Writing – review & editing

Current address: Toronto, Canada

Affiliation Department of Psychology, Glendon College, York University, Toronto, Canada

David J. I. Seaman

Roles Writing – review & editing

Affiliation Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, United Kingdom

Christine Caurant

Roles Data curation, Writing – review & editing

Affiliation Independent Conservation Consultant, Lannion, France

Dirck Byler

Roles Writing – review & editing

Affiliations IUCN SSC Primate Specialist Group Section on Great Apes, c/o Re:wild, Austin, Texas, United States of America, Re:wild, Austin, Texas, United States of America

Serge A. Wich

Roles Conceptualization, Methodology, Writing – review & editing

S.A.Wich@ljmu.ac.uk

Affiliation School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.