Katarzyna Nowak is a Research Associate at the University of the Free State, Qwaqwa campus, South Africa. Her research focuses on the behavioural flexibility of threatened species. Adrian A. Barnett is a Research Fellow at Roehampton University, and has worked with flooded habitats and their primates for more than twenty-five years. Ikki Matsuda is an Associate Professor at the Chubu University Academy of Emerging Sciences and a member of both the Japan Monkey Centre (Advisor) and the Wildlife Research Center of Kyoto University (specially appointed Associate Professor) in Japan. He focuses on a synthetic understanding of the evolution and ecology of colobine species, in particular of the proboscis monkey.