About the Authors

Erik Meijaard

Roles Conceptualization, Formal analysis, Investigation, Supervision, Writing – original draft, Writing – review & editing

emeijaard@gmail.com

Affiliations Borneo Futures, Bandar Seri Begawan, Darussalam, Brunei, Durrell Institute of Conservation and Ecology, University of Kent, Canterbury, United Kingdom, School of Biological Sciences, University of Queensland, St Lucia, Australia

Safwanah Ni’matullah

Roles Data curation, Methodology

Affiliation Borneo Futures, Bandar Seri Begawan, Darussalam, Brunei

Rona Dennis

Roles Formal analysis, Methodology, Resources, Writing – original draft

Affiliation Borneo Futures, Bandar Seri Begawan, Darussalam, Brunei

Julie Sherman

Roles Investigation, Project administration, Writing – original draft, Writing – review & editing

Affiliations Borneo Futures, Bandar Seri Begawan, Darussalam, Brunei, Wildlife Impact. Portland, Oregon, United States of America

Onrizal

Roles Data curation, Investigation, Writing – original draft

Affiliation University of Sumatera Utara, Medan, Indonesia

Serge A. Wich

Roles Conceptualization, Data curation, Project administration, Writing – original draft

Affiliation Liverpool John Moores University, Liverpool, United Kingdom

Competing Interests

Several of the authors are engaged in programs focused on the conservation of the Tapanuli orangutan. Erik Meijaard and Serge Wich have actively advocated against a hydropower project that is being developed in the current range of the Tapanuli orangutan but have not received funding for this. These activities could be perceived to bias our research. This does not alter our adherence to PLOS ONE policies on sharing data and materials.