The enhanced tool‐kit of two groups of wild bearded capuchin monkeys in the Caatinga: tool making, associative use, and secondary tools

  title={The enhanced tool‐kit of two groups of wild bearded capuchin monkeys in the Caatinga: tool making, associative use, and secondary tools},
  author={Massimo Mannu and Eduardo B. Ottoni},
  journal={American Journal of Primatology},
The use of stones to crack open encapsulated fruit is widespread among wild bearded capuchin monkeys (Cebus libidinosus) inhabiting savanna‐like environments. Some populations in Serra da Capivara National Park (Piauí, Brazil), though, exhibit a seemingly broader toolkit, using wooden sticks as probes, and employing stone tools for a variety of purposes. Over the course of 701.5 hr of visual contact of two wild capuchin groups we recorded 677 tool use episodes. Five hundred and seventeen of… 

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Evidence of adaptability in the use of stone tools by the capuchin monkey population of Serra Talhada provides an example of the complexity that these primates demonstrate in food processing.

Optional tool use: The case of wild bearded capuchins (Sapajus libidinosus) cracking cashew nuts by biting or by using percussors

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Matching physical properties of food and tools in three populations of wild capuchin monkeys

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Transport of Functionally Appropriate Tools by Capuchin Monkeys (Cebus apella)

Capuchin monkeys’ propensity for transporting tools is confirmed, their capacity to select the functionally appropriate tool for two different tool‐use tasks is demonstrated, and they can retain the memory of the correct choice during a travel time of several seconds.

Cashew Nut Positioning during Stone Tool Use by Wild Bearded Capuchin Monkeys (Sapajus libidinosus)

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Characteristics of hammer stones and anvils used by wild bearded capuchin monkeys (Cebus libidinosus) to crack open palm nuts.

Wild capuchins provide a new reference point for interpreting early percussive stone tool use in hominins, and a point of comparison with chimpanzees cracking nuts.

Wild capuchin monkeys (Cebus libidinosus) use anvils and stone pounding tools

An exploratory investigation in an area where nut‐cracking by wild capuchin monkeys is common knowledge among local residents finds physical evidence that monkeys cracked nuts on rock outcrops, boulders, and logs (collectively termed anvils).

Wild capuchins (cebus capucinus) fail to use tools

The results indicate that the capuchins did not use a tool to solve this novel foraging problem and did not attempt to touch or pick up the dowels.

Semifree-ranging Tufted Capuchins (Cebus apella) Spontaneously Use Tools to Crack Open Nuts

A role for observational learning is suggested, even if restricted to stimulus enhancement, in a group of semifree-ranging capuchins living in a reforested area (Tietê Ecological Park, São Paulo, Brazil).

Capuchin Stone Tool Use in Caatinga Dry Forest

Wild capuchin monkeys inhabiting dry forest were found to customarily use tools as part of their extractive foraging techniques, which consisted of twigs and sticks used to probe for insects and stones used for cracking and digging.

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Capuchins' behavior was similar in form and function to behavior that has been reported for chimpanzees in analogous situations and is consistent with a hypothesis of cross-species continuity in the skillful use of tools by primates.

Manufacture and use of hook-tools by New Caledonian crows

New Caledonian crows Corvus moneduloides are reported on the manufacture and use of two different types of hook tool to aid prey capture: hooked-twig and stepped-cut barbed pandanus leaf.

Ontogeny of manipulative behavior and nut-cracking in young tufted capuchin monkeys (Cebus apella): a perception-action perspective.

How do capuchin monkeys learn to use stones to crack open nuts? Perception-action theory posits that individuals explore producing varying spatial and force relations among objects and surfaces,