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Bald eagles are not really bald! They
are called "bald" because this is the
Native American word for "white," and
the adult eagle's head is covered with white feathers.
The Bald Eagle is one of the largest eagles known.
It is our national symbol, chosen because of its
representation of freedom, bravery, and power;
but not everyone wanted the eagle! Did you know
Benjamin Franklin wanted the turkey instead?
Are Bald Eagles Endangered?
The bald eagle is protected by law, and until
recently it was considered an endangered species.
It has now been upgraded to "threatened."
Once abundant everywhere in North America, the
eagle's population was severely depleted in the
latter half of the 20th century due to being killed
by farmers and fishermen out of concern for their
livestock, being captured for use in falconry,
and being susceptible to the effects of DDT, a
pesticide which weakens the shells of birds' eggs.
Facts About Bald Eagles
An adult bald eagle can weigh 15 pounds, and his
wingspan may reach 8 feet across! Because of their
size, eagles build huge nests in comparison with
most other birds. These nests can be 8 feet across
and up to 12 feet high! You can see -- and stand
inside -- a reconstruction of an average eagle's
nest here at the Zoo.
Like many birds, eagles usually mate for life.
Unlike some other birds, however, the eagle will
readily accept a new mate after losing a previous
mate to death. Eggs incubate for usually about
forty days, and the duty of sitting on them is
shared by both the male and female.
Bald eagles are classified as a kind of "fish
eagle," meaning that they prefer to catch
and eat fish. They most often fish by simply gliding
above the water and plucking an unsuspecting fish
from beneath the water's surface with their powerful
talons. Despite this, however, eagles in the wild
are often "opportunistic" -- if no fish
are readily available, they may eat rabbits, rodents,
or even carrion (animals that are already dead).
They may steal food from other predators, or even
from other eagles. They can also store food inside
what is called a "crop," a sort of pouch
in the esophagus.
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