, Volume 55, Issue 3, pp 365–368 | Cite as

Interactions between a wild Bornean orang-utan and a Philippine slow loris in a peat-swamp forest

  • Helen C. Morrogh-Bernard
  • Jessica M. Stitt
  • Zeri Yeen
  • K. A. I. Nekaris
  • Susan M. CheyneEmail author
News and Perspectives


All documented orang-utan–loris interactions have been from Sumatra, where lorises were opportunistically preyed upon by orang-utans. In this paper, we describe two accounts of the Bornean orang-utan (Pongo pygmaeus wurmbii) interacting with the Philippine slow loris (Nycticebus menagensis). The interactions were by two adolescent female orang-utans. No attempts to catch the loris were observed on either occasion. Neither interaction was hostile. During the second observation, which was more detailed, we considered the behaviour to be play rather than aggression or attempted predation. Based upon the lack of interest from the adult females during these rare encounters, we propose that the behaviour represents play or non-aggressive exploration rather than predation.


Slow loris Orang-utan Predation 



We gratefully thank the Indonesian Ministry of Science and Technology and the Indonesian Department of Forestry for granting permission to carry out research in the Sabangau forest, and we thank CIMTROP for sponsoring this research and providing invaluable logistical support. Funding for this work came from the Leakey Foundation, the Wildlife Conservation Society and the Arcus Foundation.


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Copyright information

© Japan Monkey Centre and Springer Japan 2014

Authors and Affiliations

  • Helen C. Morrogh-Bernard
    • 1
  • Jessica M. Stitt
    • 1
  • Zeri Yeen
    • 1
  • K. A. I. Nekaris
    • 2
  • Susan M. Cheyne
    • 1
    • 3
    Email author
  1. 1.Orangutan Tropical Peatland ProjectPalangka RayaIndonesia
  2. 2.Nocturnal Primate Research Group, School of Social Sciences and LawOxford Brookes UniversityOxfordUK
  3. 3.Wildlife Conservation Research Unit, Department of ZoologyOxford University, Recanati-Kaplan CentreOxfordUK

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