If evolution had a sense of humor – its favorite punchline might be the howler monkeys. These tree-top vocalists are nature’s rock stars: dramatic, loud and convinced that volume equals value.

New Jersey's Cape May County Park and Zoo has a new resident, and he is ready to make some noise — literally. Meet Diego, a 6-year-old male Black Howler Monkey, who recently arrived from a zoo in Ohio ...

Monte the howler monkey may be the loudest Dad at the Birmingham Zoo. Things are really getting loud in his family. Monte is now the father of three at the Birmingham Zoo, following the June 6 birth ...

COMALCALCO, Mexico — Threatened howler monkeys have been dropping dead from trees in Mexico’s southeastern tropical forests in recent weeks amid a nationwide drought and heat waves that have sent ...