About the Authors

J. Berton C. Harris

Contributed equally to this work with: J. Berton C. Harris, Pamela C. Rasmussen

Affiliations Environment Institute and School of Earth and Environmental Sciences, University of Adelaide, Adelaide, South Australia, Australia, Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, New Jersey, United States of America

Pamela C. Rasmussen

Contributed equally to this work with: J. Berton C. Harris, Pamela C. Rasmussen

Affiliations Michigan State University Museum and Department of Integrative Biology, East Lansing, Michigan, United States of America, Bird Group, Department of Life Sciences, Natural History Museum at Tring, Tring, Herts, United Kingdom

Ding Li Yong

Affiliations Fenner School of Environment and Society, Australian National University, Acton, Australian Capital Territory, Australia, South-east Asian Biodiversity Society, Singapore, Republic of Singapore

Dewi M. Prawiradilaga

Affiliation Division of Zoology, Research Centre for Biology, Lembaga Ilmu Pengetahuan Indonesia, Cibinong-Bogor, West Java, Indonesia

Dadang Dwi Putra

Affiliation Celebes Bird Club, Palu, Central Sulawesi, Indonesia

Philip D. Round

Affiliation Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand

Frank E. Rheindt

dbsrfe@nus.edu.sg

Affiliation Department of Biological Sciences, National University of Singapore, Singapore, Republic of Singapore

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PCR JBCH DLY. Performed the experiments: PCR JBCH DLY DMP DDP. Analyzed the data: PCR JBCH FER. Contributed reagents/materials/analysis tools: PCR JBCH PDR FER. Wrote the paper: PCR JBCH DLY DMP PDR FER. Obtained permission for fieldwork: DMP DDP.