They can use this tail as an extra arm to grip or even hang from branches—no Old World monkeys have such a tail. A gripping tail is particularly helpful to howler monkeys because they rarely ...

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 ...

A pair of loving monkeys will mark their 17th anniversary together on Valentine's day. Howler monkeys Tolkien and Clyde, have four children, spend all their time together and cuddle using their ...

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My adventure of a lifetime began in 2015 when I was asked to follow the tree-top lives of Costa Rica’s gravity-defying howler monkeys (Alouatta palliata palliata). Image by Justine Allan.

According to the fifth census of Mantled Howler Monkeys, Alouatta palliata, on Barro Colorado Island in Panama, monkey numbers have changed little since the late 1970s. Disclaimer: AAAS and ...

An ongoing study of the cause of death of howler monkeys on Barro Colorado has identified the howler monkey bot fly Cuterebra baeri as the single most important factor. Very young monkeys are the ...

This distinctive cacophony belongs to none other than the howler monkey, known for their extraordinary vocal prowess. Earning the title of the loudest land mammal, howler monkeys have intrigued ...

MEXICO CITY (AP) — 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 ...

Its sharp claws make climbing trees a simple task. There are other animals too. Like that howler monkey. It uses its tail like an extra arm, helping it move from tree to tree. And it's eating a ...