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

Scientists have captured footage of an unusual social tradition in capuchin monkeys abducting infant howler monkeys – a never ...

"Monkey see, monkey do" has had distressing consequences for howler monkeys on a small island off the coast of Panama.

Permanent mother-infant separation prior to natural weaning is a common husbandry practice in monkey breeding colonies. In the United States, such colonies have been established in all eight Regional ...

Baby spider monkeys continue to nurse throughout their first year and typically aren't fully weaned and independent until they turn two. Most will continue to stay close to their mothers until ...