We just learned about the Colombian Red Howler.
Another type of new world monkey is the Black Howler, also called black and gold howler or alouatta caraya.
This type of monkey lives in South America, spending most of their time in the trees.
They are well known for their howling, which sounds more like roaring, and can be heard from miles away.
These monkeys are some of the least active monkeys in the world, as they spend almost the whole day sleeping and are usually only awake and moving around for a few hours a day!
(from: wikipedia - black howler)
Howler Monkeys | National Geographic - National Geographic
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