Nightjars are medium-sized nocturnal or crepuscular birds in the family Caprimulgidae and order Caprimulgiformes.
They are characterised by long wings, short legs, and very short bills. Some New World species are called nighthawks. The English word Nightjar originally referred to the European Nightjar
Potoos are a group of birds related to the oilbird, with which they share the Sedentaves subclade. They are sometimes called poor-me-ones, after their haunting calls. The family Nyctibiidae was formerly included with the Nightjars in the order Caprimulgiformes but is now placed in a separate order, Nyctibiiformes.
