Orangutans have larger gestural repertoires in captivity than in the wild—A case of weak innovation? by Marlen Fröhlich, Natasha Bartolotta, Caroline Fryns, Colin Wagner, Laurene Momon, Marvin Jaffrezic, Tatang Mitra Setia, Caroline Schuppli, Maria A. van Noordwijk, Carel P. van Schaik

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