Learn how howler monkeys use deep roars to defend territory attract mates and warn rival groups from far away.

A black howler monkey vocal chorus is seen at the Biological Field Station Corrientes, Argentina in this handout image released to Reuters on October 21, 2015. REUTERS/Mariana Rano/Handout via Reuters ...

As far as calls of the wild go, howling is among the most mesmerizing—but not many animals do it. For this Saturday's Weird Animal Question of the Week, we thought we'd listen in to the howling ...

Yodellers of the world, you never stood a chance: Monkeys will always be better at yodelling than humans because they have a "cheap trick" hidden in their voice box, scientists revealed Thursday. When ...

SALT LAKE CITY, Oct. 22, 2015 - Across the animal kingdom, males hoot and holler to attract females and ward off competing suitors. Now, a new study finds that male howler monkeys with deeper calls ...

WASHINGTON, Oct 22 (Reuters) - The howler monkeys whose guttural calls reverberate through Central and South American rainforests possess a secret that the males of the species may prefer to be left ...