1. Sociobiology/Anthropology DepartmentUniversity of Göttingen Kellnerweg 6 37077 Göttingen Germany
2. Behavioral Ecology & Sociobiology UnitGerman Primate Center, Leibniz Institute for Primate Research Kellnerweg 4 37077 Göttingen Germany
3. Leibniz ScienceCampus “Primate Cognition”German Primate Center Kellnerweg 4 37077 Göttingen Germany
4. Department of Natural Resource SciencesMcGill University Macdonald‐Stewart Building, 21111 Lakeshore Road, Ste. Anne de Bellevue Québec H9X 3V9 Canada