n. 油鸱

[ noun ]
nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter
<noun.animal>

Guacharo \Gua*cha"ro\, n. [Cf. Sp. gu['a]charo sickly,
dropsical, guacharaca a sort of bird.] (Zo["o]l.)
A nocturnal bird of South America and Trinidad ({Steatornis
Caripensis}, or {S. steatornis}); -- called also {oilbird}.

Note: 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.