The crossword solutions for the term 'BIRD SOUND' are COO (3 letters), CHEEP (5 letters), TWEE (4 letters), TWEET (5 letters), CHIRP (5 letters), PEEP (4 letters), TRILL (5 letters), CAW (3 letters), NOTE (4 letters), TIRALEE (7 letters), and TWITTER (7 letters). These words all refer to different sounds that birds make. COO is a low, soft sound made by doves and pigeons, while CHEEP is a short, high-pitched sound made by chicks. TWEE is a light, sweet sound made by small birds, and TWEET is a short, sharp sound made by many types of birds. CHIRP is a short, cheerful sound made by some birds, and PEEP is a short, high-pitched sound made by some birds. TRILL is a rapid series of notes made by some birds, and CAW is a harsh, rasping sound made by crows and ravens. NOTE is a short, musical sound made by some birds, and TIRALEE is a long, trilling sound made by some birds. Finally, TWITTER is a series of short, high-pitched sounds made by some birds.