TABASCO, MEXICO — A baby howler monkey was rescued after its mother died due to a devastating heatwave that has killed at ...

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 ...

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 ...

“But no, the truth is that babies are very delicate, they can’t be in a house where there are dogs or cats, because they have pathogens that can potentially be fatal for howler monkeys,” he ...

“When I was a child living on the southern Pacific coast of Costa Rica, my parents would take me to see golden-mantled howler monkeys (Alouatta palliata palliata) in the forest most weekend ...

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.

Brown howler monkeys (Alouatta guariba ... In 2016, Kala would birth and raise her first baby, a sign that even with problems, Refauna’s efforts were paying off. But a family of three is ...

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 Gulf coast ...