Nocturnal birds are birds that are active at night. The crossword solutions for the term nocturnal bird include OWL (3 letters), NIGHTJAR (8 letters), owlet (5 letters), KIWI (4 letters), WHIPPOORWILL (12 letters), NIGHTINGALE (11 letters), NIGHTHAWK (9 letters), and hootowl (7 letters). Owls are a type of raptor, or bird of prey, with large eyes and a sharp beak. Nightjars are small, mottled-colored birds that feed on insects. Owlets are young owls. Kiwis are flightless birds native to New Zealand. Whippoorwills are small, grayish-brown birds with a distinctive call. Nightingales are small, brownish-gray birds with a beautiful song. Nighthawks are medium-sized birds with long wings and a short tail. Hootowls are a type of OWL with a loud call.