Hear the booming cries that gave the howler its name. Learn just what these vocal monkeys may be trying to say.

WASHINGTON (AP) — A baby howler monkey clung to the back of an older male monkey, its tiny fingers grasping fur. But they're not related and not even the same species. Scientists spotted surprising ...

Howler monkeys in Costa Rica are facing a growing threat from bot fly larvae infestations, and new research points to tourism and land use changes as key drivers. A study by the Awá Science and ...

A group of male capuchin monkeys kidnapped baby howler monkeys – a different species – on a small island of Panama. Video shows the howler monkeys clinging to the male capuchin monkeys’ backs, but the ...

Capuchin monkeys on a remote Panamanian island are abducting babies from howler monkey families, in a first-of-its-kind trend. At first, the researchers thought it was a case of “one individual who ...