Bald Eagle (Haliaeetus leucocephalus)
Order: Falconiformes, Family: Accipitridae
The bald eagle is the U.S. national bird; it is the only eagle unique to North America.
Spanish name: Aguila Cabeza Blanca, Aguila
French name: Pygargue à Tête Blanche
Other names: American eagle, white-headed eagle, white-headed sea-eagle
Adult bald eagles have brown plumage with a white head and tail. Immature eagles are irregularly mottled with white until the fourth year. Their legs are feathered halfway down the tarsus, and their beak, feet and eyes are bright yellow.
Bald eagles have massive tarsi, short and powerful grasping toes, and long talons. The talon of the hind toe is highly developed in both species. Eagles use this talon to pierce vital areas while holding prey immobile with their front toes.
A bald eagle's wingspan can reach 7 and a half feet.
I. DESCRIPTION:
- The bald eagle is the U.S. national bird; it is the only eagle unique to North America.
- Adult bald eagles have brown plumage with a white head and tail. Immature eagles are irregularly mottled with white until the fourth year. Their legs are feathered halfway down the tarsus, and their beak, feet and eyes are bright yellow.
- Bald eagles have massive tarsi, short and powerful grasping toes, and long talons. The talon of the hind toe is highly developed in both species. Eagles use this talon to pierce vital areas while holding prey immobile with their front toes.
- A bald eagle's wingspan can reach 7 and a half feet.
II. GEOGRAPHICAL RANGE AND HABITAT:
- The bald eagle is native to North America. It was originally bred from central Alaska and northern Canada, south to Baja California, central Arizona and the Gulf of Mexico.
- Bald eagles live anywhere with adequate nesting trees, roosts and feeding grounds. Open water, such as a lake or an ocean, is also a necessity.
III. DIET:
- Primarily fish eaters, bald eagles prefer salmon but will also take avian prey. Waterfowl are an important secondary food source, and eagles also eat small mammals, such as rabbits, muskrats and carrion. They occasionally eat turtles as well.
- Bald eagles seek prey from a perch or from high in the sky, swooping down to snatch it up in their talons. Bald eagles also steal food at times, often from other birds.
IV. LIFE CYCLE/SOCIAL STRUCTURE:
- Bald eagles have been known to copulate out of season. Such behavior may account for the strong loyalty between mates. However, no sound evidence exists to support the theory that eagles mate for life.
- Mates add on to their nest each breeding year, building it primarily with sticks. Bald eagle nests can eventually weigh up to 2 tons and are some of the largest nests in the world.
- Females lay their eggs (usually one to three) a few days apart, and incubation starts with the first egg and lasts five to six weeks. One to two days is the normal age difference between eaglets, and older hatchlings often dominate the younger ones for food because of their size. In a three-egg brood, the third chick has little chance of survival. Thus, sibling competition greatly hampers the recovery of the species.
- The male and female share nest duties equally; both will hunt and offer food to the eaglets.
V. SPECIAL NOTES/ADAPTATIONS:
- Bald eagles are not completely migratory; if their nesting site offers them access to open water, they will remain there year-round.
- Eagles choose migratory routes that enable them to take advantage of updrafts, thermals and food sources, usually migrating during the day.
- Eagles were upgraded from endangered to threatened in 1994.
http://animal.discovery.com
Related Content
 The ostrich is the largest living bird. Adult males stand nearly 8 feet in height and weigh between 140 to 230 pounds.
The ostrich is perfectly adapted to a mode of life that depends on running to escape predators.
It has evolved a cloven hoof consisting of only two toes, similar to that of the other animals that share its plain's existence.
|
 A man found an eagle's egg and put it in a nest of a barnyard hen. The eaglet hatched with the brood of chicks and grew up with them. All his life the eagle did what the barnyard chicks did, thinking he was a barnyard chicken. He scratched the earth for worms and insects. He clucked and cackled. And he would thrash his wings and fly a few feet into the air. Years passed and the eagle gre...
|
 The Kuranda area of far north Queensland is a key zone for the endangered Cassowary, the birds around Cassowary House have raised 7 chicks since June 1998, with another male a couple of kilometres along the same road having a similar record and currently having 4 chicks. In January 2002 we had a new female appear, and occasionally join with the family group, though the regular female soon drives ...
|
![A Talk with Irene Pepperberg [Excerpt]](http://www.animals-pictures-dictionary.com/files/images/308.jpg) One of my students was cleaning up the laboratory; we recycle whatever we can, so she was collecting all the empty bottles, throwing them in a bin, separating out the caps and putting them on the counter where Griffin, an African grey parrot, was sitting. She called me over and said, "You told me that parrots are destructive foragers and that they don't really put things together, so come her...
|
 by David Rennie An army of 700,000 specially trained ducks and chickens has been mobilised to help fight China's biggest locust plague in 25 years. The birds, which are taught to pursue and eat locusts at the sound of a whistle, are part of a national campaign that includes 280,000 people backed by crop-dusting planes and special locust-killing micro-organisms imported from Britain. Swarms of locusts have d...
|
 Order: Falconiformes, Family: Accipitridae The common black-hawk is found in the southwestern United States, throughout Mexico, Central America, and northern South America to Guyana. They can also be found in Cuba and The Isle of Pines.
Mass: 630 to 1,300 kg.
The common black-hawk averages 53 cm in length (21 inches) and has a wingspan of 127 cm (50 inches.) Like most other raptor species, common black-hawks are sexually dimorphic, wi...
|
|
Add Feedback