Funding for this research was provided by:
FP7 Ideas: European Research Council (FP7/2007-2013)
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (Project 310030_143359)
U.S. Fish and Wildlife Service
European Union
USAID’s Central Africa Forest Ecosystems Conservation Project
Fondation Tri-National Sangha
Columbus Zoo and Aquarium
Cincinnati Zoo and Botanical Garden
Woodland Park Zoo
Riverbanks Zoo and Garden
Dublin Zoo
Dutch Gorilla Foundation
Koeln Zoo
JRS Biodiversity Foundation
Article History
Received: 14 March 2024
Accepted: 10 September 2024
First Online: 17 September 2024
Declarations
:
: The authors declare that they do not have any competing interests. The research presented here utilizes data from the Mbeli Baï Study of the Wildlife Conservation Society (WCS)—Congo Program. The views expressed here are those of the authors and do not necessarily represent the views of WCS. Any errors are attributable to the authors.
: In Ivory Coast, we thank the Ministère de la Recherche Scientifique, the Ministère de l’Agriculture et des Ressources Animales and PACPNT for permission to conduct research in the Taï National Park. In the Republic of Congo, we are grateful to the Ministère de l’Economie Forestière, the Agence Congolaise de la Faune et des Aires Protégées (ACFAP), and to the Institut en Recherche Forestière within the Ministère de la Recherche Scientifique et de l’Innovation Technologique for permission to work in the Nouabalé-Ndoki National Park (research permit no. 270/2020; 001/2021). All observational methods applied here also adhere to the ethics guidelines of the Association for the Study of Animal Behaviour (ASAB).