Lucas Bustamante / White-fronted capuchin (Cebus albifrons) sitting on branch, Cuyabeno National Park, Sucumbios, Ecuador.

Lucas Bustamante / White-fronted capuchin (Cebus albifrons) climbing tree, Yasuni National Park, Orellana, Ecuador.

Lucas Bustamante / White-fronted capuchin (Cebus albifrons) leaping between trees, Yasuni National Park, Orellana, Ecuador.

Mark Bowler / White-fronted capuchin monkey (Cebus albifrons) portrait, captive, Peru.

Nick Garbutt / White-fronted Capuchin Monkey (Cebus albifrons) in forest canopy, Paujil Nature Reserve, Magdalena Valley, Colombia, South America.

Joel Sartore / Photo Ark / Shock-headed capuchin (Cebus cuscinus) juvenile male, portrait, Amazon Shelter, a wildlife rescue, rehabilitation and release center, Peru. Captive.

David Pattyn / RF - Two White-fronted capuchins (Cebus albifrons) standing on branch with mouths open in aggressive posture, Tayrona National Park, Magdalena, Colombia. (This image may be licensed either as rights m...

David Pattyn / Two White-fronted capuchins (Cebus albifrons) sitting on branch with mouths open in aggressive posture, Tayrona National Park, Magdalena, Colombia.

David Pattyn / White-fronted capuchin (Cebus albifrons) resting on tree branch, Tayrona National Park, Magdalena, Colombia.

David Pattyn / RF - White-fronted capuchin (Cebus albifrons) lying down on tree branch, Tayrona National Park, Magdalena, Colombia. (This image may be licensed either as rights managed or royalty free.)

David Pattyn / White-fronted capuchin monkey (Cebus albifrons) sitting on tree branch, Tayrona National Park, Magdalena, Colombia.

Morley Read / Female White-fronted capuchin (Cebus albifrons) grooming a younger female, Ecuador.