Katarzyna Nowak is a Research Associate at the University of the Free State, Qwaqwa campus, South Africa and a Fellow at The Safina Center, New York. Her conservation research focuses on the behavioural flexibility of threatened species. Adrian A. Barnett is Lecturer and Researcher at the National Institute for Amazon Research, Brazil, and the Federal University of Amazonas, Brazil, and a Research Fellow at Roehampton University, UK. He 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.