White-tailed eagle (Haliaeetus albicilla)

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White-tailed eagle in flight
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White-tailed eagle fact file

White-tailed eagle description

KingdomAnimalia
PhylumChordata
ClassAves
OrderFalconiformes
FamilyAccipitridae
GenusHaliaeetus (1)

This impressive bird is the largest European eagle, with huge club-ended wings which make the bright white tail seem small. The head and beak are large and protrude forward, giving the eagle a vulture-like appearance. The feathers are mottled shades of brown, with pale areas on both the upperwing and the underwing. Above the tail the feathers are reddish-brown, and pale stripes run down to the tip of the tail (7).

Also known as
Grey sea eagle, white-tailed fish eagle.
Spanish
Pigargo Coliblanco, Pigargo Coliblanco de Groenlandia, Pigargo Europeo.
Size
Length: 90 cm (2)
Wingspan: 2 - 2.4 m (2)
Weight
3.1 – 6.9 kg (2)
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White-tailed eagle biology

White-tailed eagles are sexually mature at five years old (9). They mate for life, and breed in the same territory each year. These territories continue to be used by successive generations of eagles over many decades (10). One or two chicks hatch each year, and are cared for by both the male and the female. The chicks remain near the nest for some time, until they have learnt to fly and to hunt for themselves (9).

The white-tailed eagle hunts for fish, mammals and birds. It is migratory in the north and east of its breeding range, but sedentary elsewhere (8).

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White-tailed eagle range

The largest populations of the white-tailed eagle are found in Norway and Russia, with important populations also found in south-west Greenland, Denmark, Sweden, Poland and Germany. Small numbers can be found in the rest of Europe, the Middle East, China, India and Mongolia (8). It became extinct in Britain in 1916 following excessive shooting, but was reintroduced from 1975 to the Island of Rhum in the Inner Hebrides of Scotland. It can now be found scattered along the west coast of Scotland (7).

You can view distribution information for this species at the National Biodiversity Network Gateway.
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White-tailed eagle habitat

Inhabits large, open expanses of lake, coast or river valley in temperate regions and tundra zones. It prefers to be close to undisturbed cliffs or open stands of large, mature trees for nesting (8).

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White-tailed eagle status

The white-tailed eagle is classified as Least Concern (LC) on the IUCN Red List (1) and is listed on Appendix I of CITES (3). It is also listed on Appendices I and II of the Convention on Migratory Species (CMS or Bonn Convention) (4), Appendix II of the Berne Convention on the Conservation of European Wildlife and Natural Habitats (5) and on Annex I of the EC Birds Directive (6).

IUCN Red List species status – Least Concern

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White-tailed eagle threats

Numbers of white-tailed eagles dropped sharply during the 19th Century and the first half of the 20th Century, and the European range contracted. This trend has been in reverse in the northwest of the range since the 1970s, but it is still in decline in southeast Europe. The continued loss is due to the degradation of wetlands, increasing human disturbance, accidental poisoning, deforestation, and collision with wind generators. It is also susceptible to pollution, accumulating mercury, organochlorine and other pesticides in fatty tissues, which can reduce the breeding success of the white-tailed eagle (8).

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White-tailed eagle conservation

A long-term research and nest protection project is underway for the white-tailed eagle, details of which will be kept guarded to prevent disturbance of their habitat. In Hungary, a Species Action Plan has also been published, and the white-tailed eagle is monitored. Many of the white-tailed eagle’s breeding grounds are found in protected areas, particularly in Poland, where a large proportion of the population goes to breed. Several countries feed the birds during the winter, and nest guarding is becoming more common. In Latvia, the white-tailed eagle is a protected species, in Israel its habitat in the Hula wetland is being restored, and in Slovakia, artificial nests are being installed (11).

View information on this species at the UNEP World Conservation Monitoring Centre.
There may be further information about this species available via the National Biodiversity Network Gateway.
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Find out more

For further information on the white-tailed eagle see:

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Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
arkive@wildscreen.org.uk

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Glossary

Territory
Area occupied and defended by an animal, a pair of animals or a colony.
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References

  1. IUCN Red List (May, 2008)
    http://www.iucnredlist.org
  2. BBC – Scotland the Wild (May, 2008)
    http://www.bbc.co.uk/scotland/nature/scotlandthewild/content/birds/index.shtml?bird=sea_eagle
  3. CITES (February, 2005)
    http://www.cites.org
  4. Global Register of Migratory Species (May, 2008)
    http://www.groms.de/
  5. Berne Convention on the Conservation of European Wildlife and Natural Habitats (February, 2005)
    http://www.jiwlp.com/contents/bern.pdf
  6. EC Birds Directive (February, 2005)
    http://www.jncc.gov.uk/page-1373
  7. Bird Guides (February, 2005)
    http://www.birdguides.com/species/species.asp?sp=030039
  8. BirdLife International (February, 2005)
    http://www.birdlife.org/datazone/search/species_search.html?action=SpcHTMDetails.asp&sid=3364&m=0
  9. Black Sea Red Data Book Web Site (May, 2008)
    http://www.grid.unep.ch/bsein/redbook/txt/haliaeet.htm?%20AVES
  10. Hailer, F. (2006) Conservation Genetics of the White-Tailed Eagle. Uppsala University, Sweden. Available at:
    http://www.diva-portal.org/diva/getDocument?urn_nbn_se_uu_diva-6911-1__fulltext.pdf
  11. CMS Report (February, 2005)
    http://www.cms.int/bodies/COP/cop7/list_of_docs/pdf/en/CP7CF7_06_1_Part_II.pdf
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Image credit

White-tailed eagle in flight  
White-tailed eagle in flight

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