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Eagles are large birds of prey which mainly inhabit Eurasia and Africa. Outside these two areas, just two species (the Bald and Golden Eagles) can be found in North America - (north of Mexico), a few species in Central and South America, and three others in Australia.
They are members of the bird order Falconiformes (or Accipitriformes, according to alternative classification schemes), family Accipitridae, and belong to several genera which are not necessarily closely related to each other genetically.
Eagles are differentiated from other birds of prey mainly by their larger size, more powerful build, and heavier head and bill. Even the smallest eagles, like the Booted Eagle (which is comparable in size to a Common Buzzard or Red-tailed Hawk), have relatively longer and more evenly broad wings, and more direct, faster flight. Most eagles are larger than any other raptors apart from the vultures.
Like all birds of prey, eagles have very large powerful hooked beaks for tearing flesh from their prey, strong legs, and powerful talons. They also have extremely keen eyesight to enable them to spot potential prey from a very long distance.[1] This keen eyesight is primarily contributed by their extremely large pupils which cause minimal diffraction (scattering) of the incoming light.
In Britain before 1678, Eagle referred specifically to the Golden Eagle, the other native species, the White-tailed Eagle, being known as the Erne. The modern name "Golden Eagle" for Aquila chrysaetos was introduced by the naturalist John Ray.
Eagles build their nests, called eyries, in tall trees or on high cliffs. Many species lay two eggs, but the older, larger chick frequently kills its younger sibling once it has hatched.
Eagles are sometimes used in falconry. They appear prominently in myth and literature. In the Old World, such references are commonly to the Golden Eagle (or possibly closely related species found in warmer climates).
[edit] Taxonomy
Thermographic image of an eagle, thermoregulating using its wings
Major new research into eagle taxonomy suggests that the important genera Aquila and Hieraaetus are not composed of nearest relatives, and it is likely that a reclassification of these genera will soon take place, with some species being moved to Lophaetus or Ictinaetus.[2]
[edit] Species
FAMILY ACCIPITRIDAE
- Subfamily Buteoninae - hawks (buzzards), true eagles and sea-eagles
The powerful Harpy Eagle can easily grab a monkey weighing 5 kg and fly away with it.
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- Genus Harpia
- Genus Pithecophaga
- Genus Harpyopsis
- Genus Oroaetus
- Genus Spizaetus
- Cassin's Hawk-eagle, Spizaetus africanus
- Changeable Hawk-eagle, S. cirrhatus
- Mountain Hawk-eagle, S. nipalensis
- Blyth's Hawk-eagle, S. alboniger
- Javan Hawk-eagle, S. bartelsi
- Sulawesi Hawk-eagle, S. lanceolatus
- Philippine Hawk-eagle, S. philippensis
- Wallace's Hawk-eagle, S. nanus
- Black Hawk-eagle, S. tyrannus
- Ornate Hawk-eagle, S. ornatus
- Black-and-white Hawk-eagle, S. melanoleucus
- Genus Lophaetus
- Genus Stephanoaetus
- Genus Polemaetus
- Genus Hieraaetus
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- Genus Harpagornis (extinct)
- Haast's Eagle, Harpagornis moorei - possibly belongs in either Hieraaetus or Aquila[3]
- Genus Aquila
- Bonelli's Eagle, Aquila fasciata - formerly Hieraaetus fasciatus
- Booted Eagle, A. pennata - formerly Hieraaetus pennatus
- Little Eagle, A. morphnoides
- Golden Eagle, A. chrysaetos
- Eastern Imperial Eagle, A. heliaca
- Rufous-bellied Eagle, A. kienerii
- Spanish Imperial Eagle A. adalberti
- Steppe Eagle, A. nipalensis
- Tawny Eagle, A. rapax
- Greater Spotted Eagle, A. clanga - to be moved to Lophaetus or Ictinaetus
- Lesser Spotted Eagle, A. pomarina - to be moved to Lophaetus or Ictinaetus
- Indian Spotted Eagle, A. hastata - to be moved to Lophaetus or Ictinaetus
- Verreaux's Eagle, A. verreauxii
- Gurney's Eagle, A. gurneyi
- Wahlberg's Eagle, A. wahlbergi
- Wedge-tailed Eagle, A. audax
- Genus Ictinaetus
- Genus Haliaeetus
- Genus Ichthyophaga
[edit] Eagles in culture
[edit] The word
The modern English name of the bird is derived from the Latin term aquila by way of the French Aigle. The Latin aquila may derive from the word aquilus, meaning dark-colored, swarthy, or blackish, as a description of the eagle's plumage; or from Aquilo, the Latin version of Greek Boreas, or north wind.
Old English used the term Earn, related to Scandinavia's Ørn / Örn. The etymology of this word is related to Greek ornis, literally meaning "bird". In this sense, the Eagle is the Bird with a capital B.
[edit] Eagles as national symbols
Coat of arms of the town of Berg en Terblijt in the Netherlands, an example of the prolific use of the eagle in European heraldry.
Eagles have been used by many nations as a national symbol.
[edit] Eagles as religious objects
Eagle lecterns are very common in Christian churches and cathedrals. The eagle is the symbol used to depict John the Apostle, whose writing most clearly witnesses the light and divinity of Christ. In art, John, as the presumed author of the Gospel, is often depicted with an eagle, which symbolizes the height he rose in the first chapter of his gospel. See Names of John.
The eagle is a sacred bird in some cultures and the feathers of the eagle are central to many religious and spiritual customs, especially amongst Native Americans in the United States and First Nations in Canada, as well as among many of the peoples of Meso-America. Some Native American peoples revere eagles as sacred religious objects and the feathers and parts of Bald and Golden Eagles are often compared to the Bible and crucifix. Eagle feathers are often used in various ceremonies and are used to honor noteworthy achievements and qualities such as exceptional leadership and bravery. In the cultures of the Northwest Coast, Eagle is also a supernatural being and also the ancestor and features in the heraldic crests of important clans known as totem poles.
The Moche people of ancient Peru worshipped the animal and often depicted eagles in their art.[4]
Despite modern and historic Native American practices of giving eagle feathers to non-indigenous people and also members of other tribes who have been deemed worthy, current United States eagle feather law stipulates that only individuals of certifiable Native American ancestry enrolled in a federally recognized tribe are legally authorized to obtain eagle feathers for religious or spiritual use.[5] In Canada, poaching of eagle feathers for the booming U.S. market has sometimes resulted in the arrests of First Nations person for the crime.[6]
[edit] Eagles as organizational symbols
- Munro. The image of a Golden Eagle is displayed the coat of arms of one of Scotland's most powerful clans, Munro. Gaelic Rothach.
- Greece. The double-headed eagle is the emblem of the Greek sport clubs AEK (black eagle with open wings on yellow background) and PAOK (black eagle with closed wings on white background, as a symbol of mourning). It is a symbol of the clubs' origins, since both clubs were founded by Greeks who fled to Greece from Constantinople in 1922-23. The eagle itself is derived from the later version of the Roman Eagle, the Byzantine- or East Roman eagle.
- Italy. The Roman eagle is the symbol of the Roman sports club S.S. Lazio.
- Nigeria. The Nigeria Football Association, the nation's football (soccer) governing body, has a green eagle perched on a football as its organisational symbol and logo. The Nigerian national football team is known as the 'Super Eagles', the under-20 youth team as the 'Flying Eagles', and the under-17 national side as the 'Golden Eaglets'. They all have an eagle as their symbol.
- Portugal. Eagle is the symbol of the Portuguese football team Sport Lisboa e Benfica.
- Turkey. Black Eagles is used for the Turkish sports club Besiktas J.K..Turkish Seljukian double headed eagle emblem.
- México. Eagle is the mascot form Club America´s football club, since 1981.
- Persian Empire: the symbol of the Persian army was an eagle
[edit] References
- , Shlaer, Robert (1972-05-26). "An Eagle's Eye: Quality of the Retinal Image". Science 176 (4037): 920-922. doi:10.1126/science.176.4037.920.
- , Lerner, H. R. L.; D. P. Mindell (2005). "Phylogeny of eagles, Old World vultures, and other Accipitridae based on nuclear and mitochondrial DNA". Molecular Phylogenetics and Evolution (37): 327-346.
- , Bunce, M.; et al (2005). "Ancient DNA Provides New Insights into the Evolutionary History of New Zealand's Extinct Giant Eagle". PLoS Biol 3 (1): e9. doi:10.1371/journal.pbio.0030009.
- , Berrin, Katherine & Larco Museum. The Spirit of Ancient Peru:Treasures from the Museo Arqueológico Rafael Larco Herrera. New York: Thames and Hudson, 1997.
- , Office of Law Enforcement. National Eagle Repository. Mountain-Prairie Region. United States Fish and Wildlife Service. Retrieved on 2007-11-20.
- , Sin, Lena. "Charges laid in eagle-poaching case", The Province, CanWest MediaWorks Publications Inc., 2006-04-30. Retrieved on 2007-11-20.
- Splitting headaches? Recent taxonomic changes affecting the British and Western Palaearctic lists - Martin Collinson, British Birds vol 99 (June 2006), 306-323
- Bruguier, Leonard.A Warrior's Eagle Feather
[edit] See also
[edit] External links
(Source: Wikipedia) |
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