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

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

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

A bizarre mystery unfolded on Jicarón Island as white-faced capuchins repeatedly abducted baby howler monkeys, showing no ...

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 ...

On Panama’s Jicarón island, biologists documented five male capuchin monkeys carrying at least eleven different infant howler ...

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

A young male white-faced capuchin monkey carrying a baby howler monkey, caught by a remote camera trap on Jicarón. On an island off the coast of Panama lives a population of wild primates with a ...

That's what scientists think after watching a bunch of male white-faced capuchin monkeys ... she saw a capuchin carrying a howler monkey baby. "It was not something we'd seen before.

Credit: Christian Ziegler/Brendan Barrett / Max Planck Institute of Animal Behavior/Cover Images A capuchin monkey named ‘Joker’ has sparked a bizarre and cruel fad among his kind on an island off the ...