Primatologist Susan Perry of UCLA has spent much of the past 35 years studying the complex social lives of white-faced capuchin monkeys, at a field site she established in one of the remaining patches ...

On an island in Panama, a fad that one researcher called "viscerally disturbing" has recently taken off among a group of young male monkeys. These adolescents and juveniles have started to kidnap the ...

Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason. By Elizabeth Landau Capuchin monkeys don’t generally hang out with ...

Advocacy aiming to secure the freedom of a capuchin monkey in Kansas has gained traction once again following the creation of more petitions. For the past 18 years, Frankie, a capuchin monkey, has ...

Golden Child, a male brown capuchin, was rescued from iron toxicity studies. Many research laboratories use male monkeys for testing because they are cheaper than females. (Emily Sturge/WUFT News) ...

A young male nicknamed Joker was probably the first to start carrying a howler monkey baby on his back for days on end. Then a group of other young males started to copy him. Here a white-faced ...