A research group is based in the School of Psychology and Neuroscience, at the University of St Andrews, in Scotland is investigating great ape gestures across all great ape species. This research has been conducted both in captivity and through long-term field studies in the wild. They want to understand how other great apes use their gestures and other forms of communication, as a way of getting at the evolution of human language. They are using this research to compile a video and image library of different gestures and what they mean. The gesture 'library' is available here.