[1] Univ Zurich, Dept Evolutionary Anthropol, Zurich, Switzerland
[2] Univ St Andrews, Sch Psychol & Neurosci, St Andrews, Scotland
[3] Univ Neuchatel, Dept Comparat Cognit, Neuchatel, Switzerland
[4] Univ Stirling, Div Psychol, Stirling, Scotland
[5] Univ Paris Saclay, UMI SOURCE, UVSQ, IRD, Guyancourt, France
[6] Budongo Conservat Field Stn, Masindi, Uganda