Rhesus macaques in U.S. research laboratories frequently pull out their own hair, pace in tight loops, and rock back and forth, behaviors long attributed to the stress of captivity. A study published ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study has found that chimpanzees may be far from shy bathroomgoers. A team of researchers spent more than 600 hours studying ...

Somewhere along Colombia’s Magdalena River, the country’s longest waterway, night monkeys on one bank may be drifting apart ...

A team of neuroscientists at the University of Pennsylvania has, for the first time, observed how social behavior is encoded in the brain when monkeys are doing normal, everyday things rather than ...

Capuchin monkeys are omnivores whose diet in the wild may include buds, flowers, leaves, seeds, nuts, fruit, and berries; as well as birds, eggs, small mammals, mollusks and arthropods such as insects ...

One night, 10-year-old Sebastián Montilla heard a creature moving over a tree branch on his father’s farm in Pijao, Quindío department, one of Colombia’s renowned coffee-growing regions. As he pointed ...

Proboscis monkeys, endemic to Borneo, are threatened by habitat destruction, forest fires and hunting. But until two decades ago, trade wasn’t a threat to the CITES-listed species, which is ...