About the Authors

Steffen Foerster

sf2041@columbia.edu

Affiliations Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, New York, United States of America, Institute of Primate Research, National Museums of Kenya, Nairobi, Kenya

Marina Cords

Affiliation Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, New York, United States of America

Steven L. Monfort

Affiliation Smithsonian Conservation Biology Institute, Front Royal, Virginia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SF MC SLM. Analyzed the data: SF. Contributed reagents/materials/analysis tools: SF MC SLM. Wrote the paper: SF MC SLM. Collected the data: SF.