Capuchin monkeys have been caught abducting baby howler monkeys — and no one knows exactly why. Scientists are baffled. See the first-time footage: https://t.co/DsmdRbMhOT
— Smithsonian Magazine (@SmithsonianMag) May 19, 2025
Scientists studying capuchin monkeys in Panama have discovered that they use stone tools to perform certain tasks. That's pretty amazing, but they also discovered a disturbing habit among young male capuchins -stealing babies from another species! Checking years of video, they found that this kidnapping goes back to January of 2022, when a capuchin named Joker took an infant howler monkey and walked around with it for days. Over time, other young males started taking howler monkey infants. These capuchins didn't interact with the babies much, and couldn't feed them, so some of the infants died, while others were abandoned after a few days and retrieved by their mothers.
It's not the first time social "trends" have been found spreading among juvenile male capuchin monkeys. There was a time when these monkeys found it cool to stick their fingers up another monkey's nose, and for a time they played a game of hiding things from each other in their mouths. Maybe the fad of kidnapping howler monkey infants will die out in time. Read about the discovery and the possible motivations behind it at Smithsonian.
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