Scientists have captured footage of an unusual social tradition in capuchin monkeys abducting infant howler monkeys – a never-before-seen behaviour in wild primates.

The scientists nicknamed one capuchin kidnapper Joker because the scar at the side of its mouth reminded them of the "Batman" villain.

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.

A group of male capuchin monkeys kidnapped baby howler monkeys – a different species – on a small island of Panama. Video shows the howler monkeys clinging to the male capuchin monkeys ...

Young, male capuchin monkeys have started kidnapping the babies of nearby howler monkeys. Why? Maybe boredom.

Capuchin Monkeys Caught on Camera ‘Abducting’ Baby Howler Monkeys in a Strange Tradition Seen for the First Time Scientists on Panama’s Jicarón Island were mystified by photos and videos of ...

Scientists spotted surprising evidence of what they describe as monkey kidnappings while reviewing video from a small island of Panama.

Over 15 months on Jicarón Island, researchers saw five capuchin juveniles abduct 11 endangered howler monkey infants — all for no clear purpose.

A group of male capuchin monkeys kidnapped baby howler monkeys – a different species – on a small island of Panama. Video shows the howler monkeys clinging to the male capuchin monkeys ...

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.