Orangutan positional behavior
Interspecific variation and ecological correlates
Successful foraging, reproductive, and predator avoidance strategies in orangutans rely on their ability to navigate the complex three-dimensional habitat of tropical rainforest canopy. This chapter assimilates a broad collection of published studies, complemented by unpublished results to present a comprehensive interspecific comparison of the locomotion and postures employed by wild orangutans and the supports they use to travel and feed in the canopy. Despite methodological differences between studies, results imply that, while P. abelii and P. p. morio have the capacity to perform the same gross range of positional behaviors, they actually exhibit quantitatively different positional behavior repertoires and show distinct patterns of association between positional behavior and support use. However further research is necessary to establish whether the largest differences in positional behavior exist at the species- or habitat-level.
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