1 School of Human Sciences, The University of Western Australia, Perth, WA 6009, Australia; Centre for Evolutionary Biology, School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia; International Centre of Biodiversity and Primate Conservation, Dali University, Dali, Yunnan 671003, China. Electronic address: cyril.grueter@uwa.edu.au.
2 Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, 710069, China.
3 Cognitive Ethology Laboratory, German Primate Center (DPZ), Leibniz Institute for Primate Research, 37077 Göttingen, Germany; Leibniz ScienceCampus for Primate Cognition, 37077 Göttingen, Germany.
4 Department of Psychology, University of Michigan, Ann Arbor, MI, USA; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA.
5 CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chaoyang District, Beijing 100101, China; Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming 650223, China.
6 College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, China.
7 CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chaoyang District, Beijing 100101, China.
8 School of Human Sciences, The University of Western Australia, Perth, WA 6009, Australia.
9 Department of Anthropology, University of Zurich, 8057, Zürich, Switzerland.
10 Cognitive Ethology Laboratory, German Primate Center (DPZ), Leibniz Institute for Primate Research, 37077 Göttingen, Germany; Department for Primate Cognition, Georg-August-University of Göttingen, Göttingen, Germany.
11 Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA.
12 Evolutionary and Organismal Biology Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bengaluru 560064, India.
13 Shaanxi Key Laboratory for Animal Conservation, College of Life Sciences, Northwest University, Xi'an, 710069, China; Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming 650223, China.
14 Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Konstanz, 78464, Germany; Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, 78464, Germany; Department of Biology, University of Konstanz, Konstanz, 78464, Germany; Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, 88048-970, Brazil; Centro de Estudos do Mar, Universidade Federal do Paraná, Pontal do Paraná, 83255-000, Brazil; School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, 2000, South Africa.
15 Department of Anthropology, Queens College, City University of New York, Flushing, NY, USA; New York Consortium in Evolutionary Primatology, New York, NY, USA; Anthropology, Biology and Psychology Programs, CUNY Graduate Center, 365 Fifth Avenue, New York, NY, USA; Department of Archaeology, University of Cape Town, Rondebosch, 7701, Cape Town, South Africa.