These guttural noises are identified as cooing, roaring or grunting. These birds make cooing and clucking sounds, usually in early morning or near dusk. Infants first begin vocalizing by crying, followed by cooing and then vocal play. Seizures that occur in infancy may include bursts of cooing, respirations, giggling, and smiling. The call is a characteristic cooing, "coo-COO-coo-coo-coo". The communication begins with crying and then begins to develop into cooing and babbling. These tortoises make a sound like a baby cooing with a raspy voice. When leaving cooing perches, males make an exaggerated and noisy flapping of the wings. Jon Pareles of "The New York Times" called the song a "cooing [and] sighing" one. The little pied cormorant makes a low cooing during courtship. His smooth tenor delivery and gentle cooing punctuate the introspective tone of each verse. Infants begin with cooing and soft vowel sounds. This act was originally a single-act play, called "The Cooing of Doves". They are known for their pleasant soft, staccato cooing calls. Carey's lead vocals blend into choruses of overdubbed Mariah's cooing overlapping phrases.