Howler monkey ancestors began eating leaves 13 million years ago, changing course of primate history in South 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 ...
WRAL

Monkey see, monkey do - even red wolf pups! Watch them try to howl at Museum of Life and Science

The Museum of Life and Science's red wolf pups are getting big! And, at 18 months, they're learning from mom and dad. Museum staffers recently caught some video of them taking some howling lessons ...
Reuters

Howl of a good time: Deep monkey roars come with intimate secret

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 ...
Digital Journal

Loud voices mean less sperm, at least for monkeys

A new study has found that primates either develop big voices, or big testes, but not both. This suggests that there could be some biological drive that leads a howler monkey to become louder and more ...
Johns Hopkins Medicine

Howler Monkeys Began Eating Leaves 13 Million Years Ago, Changing Course of Primate History in South America

• 13 million years ago, a medium-sized monkey known for guarding its territory among the treetops with a fearsome “howl” started doing something new. This monkey, one of the oldest known ancestors of ...