The Taï chimpanzee project is located in Cote d'Ivorie following 4 chimpanzee communities for over 40 years. The current relevant research focuses are long term demographic changes, intercommunity interactions and social bonds & cooperation. The communities live in an evergreen rainforest habitat, with 2 wet seasons (March-June; September-October) and 2 dry seasons (July-August; November-February) \cite{Doran_1997}.