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howler monkey| Widely distributed large Central and South American monkey. Howler monkeys are tree-dwelling and feed on fruit and leaves. They have a prominent, hairless face and deep jaw, and the tail is long and prehensile. |
| Howler monkeys howl at dawn to demarcate territory. The howling is produced by the unusually developed egg-shaped hyoid bone at the upper end of the wind-pipe, in a swelling beneath the chin; the whole forms a hollow, resonant soundbox. |
Classification Howler monkeys are in genus Alouatta, family Cebidae, order Primates. |
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