When it is time the egg tooth on top of its bill cracks the inside of the egg shell. This called an egg tooth. Later the unborn chick begins moving around in the shell. The egg tooth scrapes against the eggshell cutting the hard outer covering and after about 33 days the chick breaks out. Both adults sit on the eggs that hatch in the middle of June.
Science calls the newly born chicks, eyas.
When first born the chicks are helpless. One parent stays with the chicks while the other finds food for the brood. The youngsters eat an extraordinary amount of food. In about six days they weigh twice as much as when born and at three weeks will be ten times birth size. The immature birds start to fly about 40 days later.