About the Authors

Jennifer C. Perry

jennifer.perry@zoo.ox.ac.uk

Affiliations Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, United Kingdom, Jesus College, University of Oxford, Oxford, United Kingdom

Crystal T. Tse

Affiliation Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JP CT. Performed the experiments: JP CT. Analyzed the data: JP CT. Wrote the paper: JP CT.