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, ...

Howler monkeys are relatively small primates known for their incredibly loud, low-frequency roars that sound as if they come from a much larger creature. This is useful in the animal kingdom because ...

The Houston Zoo welcomed a new baby howler monkey last month. The baby, born on March 20 to mother Charlie, is on display in ...

WASHINGTON – 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 falling to their deaths from trees as Mexico suffers record heat wave A veterinarian feeds a young howler monkey rescued amid extremely high temperatures in Tecolutilla, Tabasco state, ...

A curious howler monkey reaches out for attention, displaying surprisingly affectionate behavior.

The number of heat-related howler monkeys deaths in Mexico has risen to 157, the government said, with a tragically small number of the primates treated or recovering. A heat dome — an area of strong ...

There's a major baby boom underway at the Giraffe Ranch in Dade City. Spring has sprung and the animals living on the ...

Here's a look at which neighborhoods could see a light freeze tomorrow morning. WASHINGTON – A baby howler monkey clung to the back of an older male monkey, its tiny fingers grasping fur. But they're ...