The common nighthawk (Chordeiles minor) is a medium-sized [3][4] crepuscular or nocturnal bird[3][5] of the Americas within the nightjar family, whose presence and identity are best revealed by its vocalization. Typically dark[3] (grey, black and brown),[5] displaying cryptic colouration and intricate patterns, this bird is difficult to spot with the naked eye during the day. This bird is most conspicuous when in its buoyant and erratic flight.