oilbird

A nightjar-like bird (Steatornis caripensis) native to N South America and Trinidad; roosts in caves; uses echolocation; eats fruit picked in flight; also known as the guacharo, or diablotin. It is the only nocturnal fruit-eating bird. Its fledglings are very fat, and were formerly boiled to extract oil, used for cooking. (Family: Steatornithidae.)

The Oilbird (Steatornis caripensis) is a slim, long-winged bird related to the nightjars. The "Cueva del Guácharo" (Oilbird Cave), in the mountainous Caripe district of northern Monagas, Venezuela, is where Alexander von Humboldt first studied the species. Oilbirds have been reported in various other places along the Andean mountain chain, including near Ecuador's "Cueva de los Tayos" and in Brazil: they are known to dwell as far south as the Carrasco National Park in Bolivia.