1. Department of Psychology University of California, Berkeley Berkeley California USA
2. Cognitive Ethology Laboratory German Primate Center—Leibniz Institute for Primate Research Göttingen Germany
3. Department for Primate Cognition Georg‐August‐University Göttingen Göttingen Germany
4. Leibniz ScienceCampus Primate Cognition Göttingen Germany
5. University of Portsmouth Portsmouth UK