The male swan, called the cob, helps the female, known as a pen, to look after their babies, called cygnets until they are a year old. The young don’t spend more than one day in the nest once they hatch. If the pen is still brooding eggs, the cob will take care of any cygnets that have already hatched, leading them directly to the water. Though they can swim from birth, cygnets may sometimes ride on the backs of their parents or take shelter under their wings until they are old enough to strike out on their own.