Guacharo
Guacharo , noun
[Compare Sp. guácharo sickly, dropsical, guacharaca a sort of bird.]
(Zoology) A nocturnal bird of South America and Trinidad (Steatornis Caripensis, or S. steatornis); -- called also oilbird.
It resembles the goatsuckers and nighthawks, but feeds on fruits, and nests in caverns. A pure oil, used in place of butter, is extracted from the young by the natives.