Orangutan leaf-carrying for nest-building: Toward unraveling cultural processes

  title={Orangutan leaf-carrying for nest-building: Toward unraveling cultural processes},
  author={Anne E. Russon and Dwi Putri Handayani and Purwoko Hari Kuncoro and Agnes Ferisa},
  journal={Animal Cognition},
We report an empirical study on leaf-carrying, a newly discovered nest-building technique that involves collecting nest materials before reaching the nest site. We assessed whether leaf-carrying by rehabilitant orangutans on Kaja Island, Central Kalimantan, owes to cultural influences. Findings derive from ca 600 h observational data on nesting skills and nesting associations in Kaja’s 42 resident rehabilitants, which yielded 355 nests and 125 leaf-carrying cases by 34 rehabilitants. Regional… 

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