Eagles build aeries mainly with sticks. They often decorate the aerie
with fresh green leaves while they are using it. They add new material
every year they use it, so, many old aeries are very big. A new aerie
may be only 3 feet deep. But an old aerie may be about 10 feet across
and 20 feet deep.
Females usually lay two eggs each year. The eggs must be warmed for
about 40 days before they hatch. Both parents guard the nest and take
food to the young.
Eaglets are hatched with their eyes open. They are covered with a
grayish-white down. They leave the nest when they are 11 or 12 weeks
old, but they cannot fly very well at first. They stay near the aerie
for several weeks. The parents feed them for several months, until they
can hunt well enough to get their own
food.
