About the Authors

Robert S. Walker

walkerro@missouri.edu)

Affiliation Department of Anthropology, University of Missouri, Columbia, Missouri, United States of America

Dylan C. Kesler

Affiliation The Institute for Bird Populations, Point Reyes Station, California, United States of America

Kim R. Hill

Affiliation School of Human Evolution and Social Change, and Institute of Human Origins, Arizona State University, Tempe, Arizona, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RSW DCK. Performed the experiments: RSW DCK. Analyzed the data: RSW DCK. Contributed reagents/materials/analysis tools: RSW DCK. Wrote the paper: RSW DCK KRH.