About the Authors

Christian C. Voigt

voigt@izw-berlin.de

Affiliations Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany, AG Verhaltensbiologie, Institute of Biology, Freie Universität Berlin, Takustr. 6, Berlin, Germany

Manuel Roeleke

Affiliations Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany, AG Verhaltensbiologie, Institute of Biology, Freie Universität Berlin, Takustr. 6, Berlin, Germany

Lara Marggraf

Affiliations Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany, Institute for Biochemistry and Biology, University of Potsdam, Maulbeerallee 1, Potsdam, Germany

Gunārs Pētersons

Affiliation Faculty of Veterinary Medicine, Latvia University of Agriculture, Jelgava, Latvia

Silke L. Voigt-Heucke

Affiliations Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany, AG Verhaltensbiologie, Institute of Biology, Freie Universität Berlin, Takustr. 6, Berlin, Germany

Competing Interests

The authors are affiliated with the commercial company, Oshino GmbH. The authors' affiliation with this company consists only of their being the recipients of funding for the present study as it was underway. There are no patents, products in development, or marketed products to declare. This does not alter the authors’ adherence to all PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: CCV. Data curation: CCV SVH. Formal analysis: SVH LM CCV. Funding acquisition: CCV. Investigation: MR GP. Methodology: CCV MR LM GP. Project administration: CCV GP. Resources: CCV GP. Software: SVH. Supervision: CCV GP. Validation: CCV MR LM GP SVH. Visualization: CCV MR. Writing – original draft: CCV SVH. Writing – review & editing: CCV MR LM GP SVH.