Credit: Christian Ziegler/Brendan Barrett / Max Planck Institute of Animal Behavior/Cover Images A capuchin monkey named ‘Joker’ has sparked a bizarre and cruel fad among his kind on an island off the ...

Scientists studying camera trap footage from Jicarón Island spotted something unusual: a capuchin monkey carrying an infant howler monkey on his back. Now, they’re trying to learn what it means.

On Panama’s Jicarón island, biologists documented five male capuchin monkeys carrying at least eleven different infant howler ...

Motion-triggered cameras have been used to observe white-faced capuchins on Jicarón Island, off the coast of Panama, since ...

Plus, researchers could hear adult howler monkeys calling back and forth with the infants, who would sometimes try to crawl ...