About the Authors

Adam M. Fudickar

afudickar@gmail.com

Affiliations Max Planck Institute for Ornithology, Radolfzell, Germany, Department of Biology, University of Konstanz, Konstanz, Germany

Jesko Partecke

Affiliation Max Planck Institute for Ornithology, Radolfzell, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AMF JP. Performed the experiments: AMF. Analyzed the data: AMF. Contributed reagents/materials/analysis tools: JP. Wrote the paper: AMF JP.