Scientists studying footage from Jicarón Island spotted something unusual: a capuchin monkey carrying an infant howler on his ...

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

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

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

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

Capuchins are also known for developing odd social rituals across their range. Scientists studying mainland populations have ...

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

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 ...

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

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