Scientists have found surprising video evidence of what they call monkey kidnappings – and they’re trying to figure out why.

A capuchin named Joker started the apparent trend, leading researchers to suspect "there was something a little quirky about ...

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

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

Researchers have discovered a weird, new behavior among capuchin monkeys, and it involves kidnapping howler monkey infants.

Young male capuchins have developed a strange trend of acquiring baby howler monkeys. It doesn't end well for the babies.

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.

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

A rare cultural behavior spreads among young male capuchins and baby howlers, raising questions about animal traditions and ...

Scientists have found evidence of monkey kidnappings in Panama. Video footage shows male capuchin monkeys carrying howler ...

An 18-month-old spider monkey named Violeta has been rescued during a narcotics-related search warrant executed at a Vallejo, ...

Violeta the baby spider monkey is beginning a new chapter at the Oakland Zoo after she was rescued by authorities during a ...