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Keywords:adult, Alouatta, Alouatta caraya, animal, Black, Black Howler Monkey, branch, day, daytime, daylight, call, calling, Caraya, Costa Rica, endangered, endangered species, herbivore, Howler Monkey, leaves, male, mammal, Miva Stock, monkey, National Park, Outdoor, Palo Verde, Palo Verde National Park, primate, South America, tongue, tail, tree, wild, wildlife, zoology