About the Authors

Erwin Nemeth

enemeth@orn.mpg.de

Affiliations Max Planck Institute for Ornithology, Communication and Social Behaviour Group, Seewiesen, Germany, University of Vienna, Department of Behavioural Biology, Vienna, Austria

Bart Kempenaers

Affiliation Max Planck Institute for Ornithology, Communication and Social Behaviour Group, Seewiesen, Germany

Giuliano Matessi

Affiliation University of Copenhagen, Department of Biology, Animal Behaviour Group, Copenhagen, Denmark

Henrik Brumm

Affiliation Max Planck Institute for Ornithology, Communication and Social Behaviour Group, Seewiesen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HB EN GM BK. Performed the experiments: EN HB GM. Analyzed the data: EN HB. Wrote the paper: EN HB BK GM. Analyzed the genetic data: BK.