1. Nocturnal Primate Research Group; Oxford Brookes University; Oxford OX3 0BP UK
2. A. P. Leventis Ornithological Research Institute; University of Jos; Jos 930001 Nigeria
3. Department of Anthropology; University of Missouri Columbia; Columbia Missouri 65211
4. Tanzania Forest Conservation Group; Dar es Salaam Tanzania
5. African Primate Initiative for Ecology and Speciation, Africa Earth Observatory Network, Earth Stewardship Science Research Institute; Nelson Mandela Metropolitan University; Port Elizabeth 6031 South Africa
6. EPHE, PSL Research University, Paris, France & UMR CNRS 6282 “Biogéosciences”, Univ. Bourgogne Franche-Comté; Dijon 21000 France