About the Authors

Johan Lind

johan.lind@zoologi.su.se

Affiliation Centre for the Study of Cultural Evolution & Department of Zoology, Stockholm University, Stockholm, Sweden

Patrik Lindenfors

Affiliation Centre for the Study of Cultural Evolution & Department of Zoology, Stockholm University, Stockholm, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JL. Analyzed the data: JL PL. Wrote the paper: JL PL.