Tool use by a red howler monkey (Alouatta seniculus) towards a two-toed sloth (Choloepus didactylus)

@article{RichardHansen2007ToolUB,
  title={Tool use by a red howler monkey (Alouatta seniculus) towards a two-toed sloth (Choloepus didactylus)},
  author={C. Richard-Hansen and Natalia Bello and J. Christophe Vi{\'e}},
  journal={Primates},
  year={2007},
  volume={39},
  pages={545-548}
}
Among New World monkeys, spontaneous tool use and object manipulation are commonly descirbed inCebus species only. We report here an occurrence of tool manipulation by a wild male red howler monkey (Alouatta seniculus), observed using a stick to softly but repeatedly hit a two toed sloth (Choloepus didactylus) resting in the same tree. The ecological context of this unusual behavior for this quiet species generally showing very little manipulative propensity is discussed. 

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