Giraffes are seldom heard, but they do make a variety of sounds. They grunt or snort to alert fellow herd members to danger. Other giraffe sounds include moos, snores, hisses and even flute-like noises.
Mother giraffes call or whistle to their young, who respond by bleating, mooing and mewing. If the calf doesn't respond, the female may bellow for it. Male giraffes often cough while courting a female. In addition to sounds that humans can hear, giraffes communicate by infrasonic sounds that can carry for long distances. Giraffes also communicate through behaviors such as touching, licking and sparring between adult males