Baby swans are called cygnets. The swan lays between five and 12 eggs in a feather-and down-lined nest and the cygnets hatch after a little over a month. They are covered with a gray down that gradually turns white.
In the case of the mute swan, the cygnet spends only one day on the nest before it's led down to the water by its father.
Though the cygnets are able to swim, they can also be seen riding on their parents' backs when they tire. They're able to fly after about two months, and their parents drive them off before the next clutch of cygnets is produced.