The Oilbird or Guacharo, Statornis caripensis is a curious species. It is a nocturnal and closely related to the nightjars. It feeds on fruit, favouring high energy fruit like palm seeds. As a result of this high energy diet Oilbird fledglings become extremely fat. Indigenous inhabitants and early settlers harvested these chicks and extracted a high quality oil for cooking and lighting, hence the name oilbird. Oilbirds roost and nest in caves. They navigate in the complete darkness by echolocation. Unlike the echolocation used by bats, the frequency used by Oilbirds is audible to us as a series of clicks. This clicking, together with the ghoulish screams they emit have earned the species its name of Guacharo.