Observational social learning of "know-how" and "know-what" in wild orangutans: evidence from nest-building skill acquisition. - Permana, Andrea L.; Permana, Junaidi Jaka; Nellissen, Lara; Prayogi, Eggi Septian; Prasetyo, Didik; Wich, Serge A.; van Schaik, Carel P.; Schuppli, Caroline (Communications Biology, 2025)