1. Projet Grands Singes (PGS), Cameroun, Centre for Research and Conservation (CRC) Royal Zoological Society of Antwerpen (RZSA) Antwerpen Belgium
2. Terrestrial Ecology Unit (TEREC), Department of Biology Ghent University (UGent) Ghent Belgium
3. Department of Forestry University of Dschang Dschang Cameroon
4. Department of Fundamental Sciences The University of Bamenda, HTTTC Bambili Cameroon
5. Laboratory of Tropical Forestry University of Liège Gembloux Agro‐Bio TechLiège Belgium
6. Conservation Biology Unit, Directorate Natural Environment Royal Belgian Institute of Natural Sciences Brussels Belgium