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

The Smithsonian's National Zoo is inviting its Facebook fans to answer the call of the wild by naming one of the Small Mammal House's loudest and most charismatic critters: a baby black howler monkey ...

13.3-million–13.6 million-year-old fossils from an extinct relative of the howler monkey show signs of being the first leaf-eating primate in South and Central America. Fossils from jaws of Stirtonia ...

MEXICO CITY (AP) — It's so hot in Mexico that howler monkeys are falling dead from the trees. At least 138 of the midsize primates, who are known for their roaring vocal calls, were found dead in the ...

MEXICO CITY — It’s so hot in Mexico that howler monkeys are falling dead from the trees. At least 83 of the midsize primates, who are known for their roaring vocal calls, were found dead in the Gulf ...

One of the most fun places to take the kids on a day off is the zoo. Always an exciting experience for the entire family, zoos give visitors a chance to get an up-close look at their favorite wild ...

MEXICO CITY — It’s so hot in Mexico that howler monkeys are falling dead from the trees. At least 83 of the midsize primates, who are known for their roaring vocal calls, were found dead in the Gulf ...

Perhaps we have become oblivious to the daily bombardment detailing the catastrophic effects of a warming planet. I am frightened for our future as we are experiencing the most extreme effects ...

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 ...

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