A new trend is catching on among bored young male capuchins: kidnapping baby howler monkeys, in what scientists say is the ...

"Monkey see, monkey do" has had distressing consequences for howler monkeys on a small island off the coast of Panama.

Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason.

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

On an island off the coast of Panama lives a population of wild primates with a remarkable culture. White-faced capuchins on ...

A group of white-faced capuchins on a remote island have started stealing infants from another primate species, and ...

Plus, researchers could hear adult howler monkeys calling back and forth with the infants, who would sometimes try to crawl away. Camera footage showed one occasion when an adult howler came and tried ...

Observations of Coiba's tool-using immature capuchin monkeys show them carrying abducted infant howler monkeys. What is the ...

The footage showed the capuchins walking and pounding their stone tools with baby howlers on their backs. But cameras did not ...

A young male nicknamed Joker was probably the first to start carrying a howler monkey baby on his back for days on end. Then ...

Scientists on Panama's Jicarón Island were mystified by photos and videos of young male capuchins carrying howler monkeys on their backs for days at a time ...