About the Authors

Kristine Meise

kristine.meise@googlemail.com

Affiliation Department of Animal Behaviour, University of Bielefeld, Morgenbreede 45, 33615, Bielefeld, Germany

Nikolaus von Engelhardt

Affiliation Department of Animal Behaviour, University of Bielefeld, Morgenbreede 45, 33615, Bielefeld, Germany

Jaume Forcada

Affiliation British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, United Kingdom

Joseph Ivan Hoffman

Affiliation Department of Animal Behaviour, University of Bielefeld, Morgenbreede 45, 33615, Bielefeld, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KM NE JF JIH. Performed the experiments: KM NE JF. Analyzed the data: KM JIH. Contributed reagents/materials/analysis tools: KM NE JF JIH. Wrote the paper: KM NE JF JIH.