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A capuchin named Joker started the apparent trend, leading researchers to suspect "there was something a little quirky about him, or that he was kind of lonely in a way.” Reading time 3 minutes A ...

Add Yahoo as a preferred source to see more of our stories on Google. This photo provided by researchers shows a baby howler monkey clinging onto a young adult male capuchin monkey on Jicarón Island, ...

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

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’ backs, but the ...

"This is her second baby, so she knows what she's doing," a Newquay Zoo keeper said of the monkey mom Benjamin VanHoose is the Senior News Editor on the TV team at PEOPLE. He has written about ...

A new trend is catching on among bored young male capuchins: kidnapping baby howler monkeys, in what scientists say is the first time animals have been recorded stealing another species’ infants for ...

MIAMI (CBSMiami) – Miami's Jungle Island has a cute and cuddly new addition and is proudly showing off the new little fella. He is a new white-faced baby capuchin monkey born recently at the park, but ...