When a giraffe's baby, called a calf is born, it falls from a height of 6 feet (1.8 m) on its head. But the tough landing does not hurt the baby -- it just causes it to take a big breath. After about an hour, the calf can stand up and walk. When the newborn gets older, its mother will probably leave it together with other calves in a "nursery." This means that one of the mothers stays and baby-sits while the others go out to eat.