Steatornithidae, Steatornis, oil-bird or guacharo, South America.
One species, the guacharo (Steatornis caripensis), or oil-bird, is commonly said to occur only in Venezuela, though it is found in Colombia and Ecuador also.
The principal cave, known as the Cueva del Guacharo, extends inward a distance of 2800 ft.
These caves are frequented by a species of night-hawk, called guacharo, which nests in the recesses of the rocks.
Species of the pheasant and partridge are not uncommon, and the " guacharo " (Steatornis caripensis), once believed to inhabit Venezuela only, is found in Ecuador also.
GUACHARO (said to be an obsolete Spanish word signifying one that cries, moans or laments loudly), the Spanish-American name of what English writers call the oil-bird, the Steatornis caripensis of ornithologists, a very remarkable bird, first described by Alexander von Humboldt (V oy.
In habits the guacharo is wholly nocturnal, slumbering by day in deep and dark caverns which it frequents in vast numbers.
The hard, indigestible seed swallowed by the guacharo are found in quantities on the floor and the ledges of the caverns it frequents, where many of them for a time vegetate, the plants thus growing being etiolated from want of light, and, according to travellers, forming a singular feature of the gloomy scene which these places present.
The guacharo is said to build a bowl-like nest of clay, in which it lays from two to four white eggs, with a smooth but lustreless surface, resembling those of some owls.