About the Authors
- Angela S. Stoeger
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* E-mail: angela.stoeger-horwath@univie.ac.at
Affiliation Department of Cognitive Biology, University of Vienna, Vienna, Austria
- Gunnar Heilmann
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Affiliation Gfai tech GmbH, Berlin, Germany
- Matthias Zeppelzauer
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Affiliation Institute for Software Technology and Interactive Systems, Vienna University of Technology, Vienna, Austria
- André Ganswindt
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Affiliations Department of Zoology and Entomology, Mammal Research Institute, University of Pretoria, Pretoria, South Africa, Section of Reproduction, Department of Production Animal Studies, University of Pretoria, Onderstepoort, South Africa
- Sean Hensman
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Affiliation Adventures with Elephants, Bela Bela, South Africa
- Benjamin D. Charlton
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Affiliation School of Psychology, University of Sussex, Brighton, United Kingdom
Competing Interests
Since two authors (Gunnar Heilman and Sean Hensman) are employed commercial companies the authors want to declare that they did not pay for using the equipment nor for doing research with the elephant at Bela Bela. Therefore, both companies had no financial interest concerning the research. The fact that these authors are employed by these companies does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: ASS GH. Performed the experiments: ASS GH SH AG. Analyzed the data: ASS MZ. Contributed reagents/materials/analysis tools: ASS MZ. Wrote the paper: ASS BDC.