1) Animals that use echolocation 2) Caprimulgiform bird 3) Guacharo 4) Steatornis caripensis 1) Guacharo 
The oilbird (Steatornis caripensis), locally known as the guácharo, is a bird found in the northern areas of South America (including the island of Trinidad in the Republic of Trinidad and Tobago). They are nocturnal feeders on the fruits of the oil palm and tropical laurels, and are the only nocturnal flying fruit-eating birds in the world (the ...
• (n.) See Guacharo.
(Steatornis caripensis), nocturnal bird of South America that lives in caves and feeds on fruit, mainly the nuts of oil palms. The oilbird is an ... [3 related articles]
Oil'bird` noun (Zoology) See Guacharo . 
[n] - nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter
A large, nocturnal frugivore of South America, related to nighthawks; the Oilbird is the only member of its family, Steatornithidae. Oilbirds use echolocation to reach their nests, which are located deep within caves.
guacharo noun nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter