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hoatzin |
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hoatzin [həʊˈætsɪn], hoactzin n
(Life Sciences & Allied Applications / Animals) a unique South American gallinaceous bird, Opisthocomus hoazin, with a brownish plumage, a very small crested head, and clawed wing digits in the young: family Opisthocomidae [from American Spanish, from Nahuatl uatzin pheasant] ThesaurusLegend: Synonyms Related Words Antonyms
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But hoatzins have an unusually big crop (food-storage pouch) and esophagus (tube leading from the mouth to the stomach), explains Alejandro Grajal, an ornithologist (bird scientist). Scientists have disagreed most recently over whether hoatzins are closer to cuckoos or to galliforms such as pheasants, chickens, and turkeys. Strahl finds hoatzins rely on the lower esophagus and the crop -- an enlarged pocket of the upper esophagus in which birds hold and soften food -- to extract smelly but life-sustaining volatile fatty acids from the cellulose of tender young plants before they reach the small intestine. |
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