An extinct relative of the howler monkey may have been the first leaf-eating primate in South and Central America ...

Thirteen million years ago, a group of medium-sized monkeys known for guarding their territory among the treetops with fearsome "howls" started doing something new. These monkeys, among the oldest ...

The “big truck, small man” phenomenon is also seen in the animal kingdom. The loudest howler monkeys were found to have the smallest packages. Hyoid bone size, which is responsible for vocalizations, ...

Perhaps we have become oblivious to the daily bombardment detailing the catastrophic effects of a warming planet. I am frightened for our future as we are experiencing the most extreme effects ...

CAPE MAY COURT HOUSE, N.J. (WPVI) -- The Cape May County Park and Zoo is introducing its newest resident: a 6-year-old male black howler monkey named Diego. Diego came from a zoo in Ohio to be a ...

Observations of Coiba’s tool-using immature capuchin monkeys show them carrying abducted infant howler monkeys. What is the reason for this behavior? Vanessa Crooks Caught in the act! Capuchin monkeys ...

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 ...