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 ...
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 ...
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