1. Department of Psychology, University of York, Heslington, York YO10 5DD, UK
2. Department of Psychology, Nottingham Trent University, Chaucer Building, 50 Shakespeare St, Nottingham NG1 4FQ, UK
3. Department of Anthropology, Durham University, South Road, Durham DH1 3LE, UK
4. School of Agricultural and Environmental Sciences, Mountains of the Moon University, PO Box 837, Fort Portal, Uganda
5. Departments of Psychology, EEB, University of Michigan, Ann Arbor, MI 48109, USA
6. Department of Anthropology, University of Texas at Austin, 2201 Speedway Stop C3200, Austin, TX 78712, USA
7. Department of Anthropology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2 L 3G1
8. Instituto de Biologia, Universidad Nacional Autonoma de México (UNAM), Circuito exterior s/n, Ciudad Universitaria, Copilco, Coyoacán, Mexico City 04510, Mexico
9. Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca (CIIDIR), Instituto Politécnico Nacional, Hornos No. 1003, Col. Noche Buena, Municipio de Santa Cruz Xoxocotlán, Oaxaca 71230, Mexico
10. Department of Anthropology, University of California, 552 University Road, Santa Barbara, CA 93106-3210, USA
11. Department of Anthropology, Yale University, 10 Sachem Street, New Haven, CT 06511, USA
12. Department of Psychology, Durham University, South Road, Durham DH1 3LE, UK
13. College of Life and Environmental Sciences, University of Exeter, Penryn Campus Treliever Road, Penryn TR10 9FE, UK
14. Human and Animal Ethology (EthoS), University of Rennes, Normandie University, CNRS, EthoS - UMR6552, Campus de Beaulieu, 263 Avenue du Général Leclerc, 35000 Rennes, France
15. Department of Anthropology, University of New Mexico, 500 University Boulevard NE, Albuquerque, NM 87131, USA
16. Field Research Station Los Tuxtlas, Institute of Biology, National Autonomous University of Mexico, Circuito interior s/n, Ciudad universitaria, Delegacion coyoacan, Mexico City CP 04510, Mexico
17. Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
18. Leibniz ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany
19. School of Biological and Environmental Science, Liverpool John Moores University, Liverpool L3 3AF, UK
20. Centre for Research and Conservation, Royal Zoological Society of Antwerp, 2018 Antwerp, Belgium
21. Department of the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Bücklestraße 5, 78467 Konstanz, Germany
22. Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
23. School of Psychology & Neuroscience, University of St Andrews, St Andrews, KY16 9JP, UK
24. School of Human Sciences, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
25. UWA Africa Research and Engagement Centre, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
26. Centre for Evolutionary Biology, School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
27. Department of Integrative Biology, University of Texas at Austin, 2415 Speedway, Austin, TX 78712, USA
28. Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138, USA
29. K. Lisa Yang Center for Conservation Bioacoustics, Cornell Lab of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
30. Department of Anthropology, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA
31. Department Sociobiology/Anthropology, Johann-Friedrich-Blumenbach Institute of Zoology and Anthropology, University Göttingen, Kellnerweg 6, 37077 Göttingen, Germany
32. Primate Research Institute, Kyoto University, 41-2 Kanrin, Inuyama, Aichi 484-8506, Japan
33. Department of Life Sciences, University of Roehampton, Holybourne Avenue, London SW15 4JD, UK
34. Department of Anthropology, Tufts University, 5 The Green, Medford, MA 02155, USA
35. School of Psychology, University of Lincoln, Lincoln, Brayford Wharf East LN5 7TS, UK
36. Department of Comparative Cognition, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland
37. Inkawu Vervet Project, Mawana Game Reserve, Swart Mfolozi 3115, South Africa
38. Department of Psychology, Centre for Evolutionary and Comparative Psychology, University of Portsmouth, King Henry Building, King Henry I Street, PO1 2DY Portsmouth, UK
39. Macaca Nigra Project, Tangkoko Reserve, PO Box 1495, Bitung, Indonesia
40. Anthropology, Faculty of Humanities and Social Sciences, Athabasca University, Athabasca, Canada
41. Centre Suisse de Recherches Scientifiques en Côte d'Ivoire, 01 BP 1303 Abidjan 01, Ivory Coast
42. Research Group Primate Social Evolution, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
43. Department of Behavioral Ecology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University Goettingen, Göttingen, Germany
44. Department of Anthropology and Archaeology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
45. Department of Anthropology, New York University, 25 Waverly Place, New York, NY, USA
46. Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, Circuto Escolar 3000, C.U., 04510 Mexico City, Mexico
47. UPIITA, Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2580, La Laguna Ticoman, 07340 Mexico City, Mexico
48. Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
49. Department of Anthropology, University of Georgia, 355 S. Jackson Street, Athens, GA 30602, USA
50. Department of Biology, York University, Keele Campus, 4700, Keele Street, Toronto, ON Canada, M3J 1P3
51. School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA
52. CONACYT-Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca (CIIDIR), Instituto Politécnico Nacional, Hornos No. 1003, Col. Noche Buena, Santa Cruz Xoxocotlán, Oaxaca 71230, Mexico
53. Scottish Primate Research Group, Division of Psychology, School of Social and Health Sciences, University of Abertay Dundee, Dundee, Scotland
54. Department of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland
55. Department of Anthropology, University of Massachusetts Amherst, 240 Hicks Way #217, Amherst, MA 01003, USA
56. Endocrine Research Laboratory, Mammal Research Institute, Faculty of Natural and Agricultural Science, University of Pretoria, Hatfield, Pretoria 0028, Republic of South Africa
57. Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Pretoria, Florida 1710, Republic of South Africa
58. Department of Psychology, University of Lethbridge, Alberta, Canada T1K6T5
59. School of Psychology and Neuroscience, University of St. Andrews, South Street, St. Mary's Quad, South Street, St. Andrews KY16 9JP, UK
60. Department of Psychology, University of Warwick, University Road, Humanities Building, Coventry CV4 7AL, UK