Genus Steatornis, commonly known as the oilbird or guácharo, is a group of nocturnal birds found in the Americas. These birds inhabit dark caves and feed mainly on fruits and insects. In terms of synonyms for Genus Steatornis, oilbird and guácharo are the most widely used ones. Another synonym for Genus Steatornis is the cave-wombat, which is a reference to their unusual appearance and habitat. These birds are also referred to as the fatty goose, a nod to their high-fat diet. Overall, the Genus Steatornis is a fascinating group of birds with several strong synonyms associated with them.