Caprimulgidae, of which the birds are often called nightjar, from their jarring cries, is the single bird family of the order Caprimulgiformes. The birds of the family are also called goatsuckers or bugeaters and they are medium-sized nocturnal or crepuscular birds.

Caprimulgiformes, Caprimulgidae: from Caprimulgus Latin caprimulgus nightjar (capra nanny goat; mulgere to milk).