1. Behavioural Ecology, Institute of Ecology and Evolution University of Bern Hinterkappelen Switzerland
2. Department of Sociobiology and Anthropology, Johann‐Friedrich‐Blumenbach Institute for Zoology and Anthropology University of Göttingen Göttingen Germany
3. Behavioural Ecology and Sociobiology Unit, German Primate Center Leibniz Institute for Primate Research Göttingen Germany
4. Department of Collective Behavior Max Planck Institute of Animal Behavior Konstanz Germany
5. Institute for Advanced Study (Wissenschaftskolleg zu Berlin) Berlin Germany