Angry Giraffe

Although generally quiet and non-vocal, giraffes have been heard to communicate with various sounds. Courting males will emit loud coughs. Females will call their young by whistling or bellowing. Calves will bleat, moo, or make mewing sounds. In addition, giraffes will grunt, snort, hiss, or make strange flute-like sounds. Recent research has provided evidence that the giraffes produce infrasound.
Birthing, parental care, and lifespan
Giraffe gestation lasts between 400 and 460 days, after which a single calf is normally born, although twins occasionally occur. The mother gives birth standing up and the embryonic sack usually bursts when the baby falls to the ground. Newborn giraffes are about 1.8 m (5 ft. 11 in.) tall.