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LC
Golden Eagle Aquila chrysaetos

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S.; Perrins, C. M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

Population justification
The global population is estimated to number > c.170,000 individuals (Rich et al. 2004), while national population estimates include: c.100-10,000 breeding pairs in China; < c.100 breeding pairs and < c.50 wintering individuals in Korea; c.100-10,000 breeding pairs in Japan and c.100-10,000 breeding pairs in Russia (Brazil 2009).

Trend justification
This species has had stable population trends over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Ecology

Behaviour  This is the most widespread of the Aquila eagles, ranging across the Nearctic and Palearctic (70°N to 20°S), and fringing Indomalaya and the Afrotropics. It is uncommon to scarce across its range. In general, the species is sedentary, with juveniles dispersing as far as 1000km in their first few years. Birds occupying the mostly northerly regions (>65°N), such as Alaska, northern Canada, Fennoscandia and northern Russia, migrate south. In the Nearctic there are southwards movements to southern Alaska and southwest USA in September, via regular flyways, in particular through southwest Alberta. In the Palearctic, movements occur in a broad front to wintering areas in southeast Europe, the Russian steppes, Mongolia, northern China and Japan. Juveniles and immatures will go as far as North Africa (Ferguson- Lees and Christie, 2001). Habitat The species occupies a wide range of flat or mountainous, largely open habitats, often above the tree line, from sea level to 4000m. In the Himalayas it has been recorded as high as 6200m (Watson, 2010). Diet The species’ diet is very broad, taking mammals, birds, reptiles, fish, amphibians, insects and carrion variously, depending on the regional prey availability. Prey taken are usually 0.5-4.0 kg and the species can hunt in pairs or small groups (Ferguson- Lees and Christie, 2001). Breeding Site Nesting occurs on cliff ledges and where these are not available, in large trees or similar artificial structures. Nests are constructed from sticks and are added to in successive years, growing to 2m in diameter. The breeding season spans March – August throughout the majority of its range, and in southern areas begins as early as November; whilst in the most northerly regions it will start as late as April (Ferguson- Lees and Christie, 2001).

Threats
The species was heavily persecuted in the 19th Century, and although this threat has diminished significantly with populations now generally stable, the species is still deliberately poisoned, shot and trapped, and it is declining in Spain and North America (Katzner, Smith, et al., 2012).  In the past the species was affected by the use of organochlorine pesticides although this is not a significant problem today. There are records of mortality as a result of electrocution when perching on power lines, but no data to suggest any substantial demographic impact. Wind energy developments are a source of direct mortality for the species, particularly in California where wandering sub-adults are mostly affected (Watson, 2010).  Future developments in flyways may affect migrating adult eagles, and locally may cause effective habitat loss and lead to collisions (Katzner, Brandes, et al., 2012b). In addition, afforestation, long term changes in food supply, including reduced livestock carrion through changing management practices and climate change, may threaten the species in future (Watson, 2010).

Related state of the world's birds case studies

References
Brazil, M. 2009. Birds of East Asia: eastern China, Taiwan, Korea, Japan, eastern Russia. Christopher Helm, London.

Katzner, T. E., Brandes, D., Miller, T., Lanzone, M., Maisonneuve, C., Tremblay, J. A., Mulvihill, R., Merovich Jr, G. T. 2012. Topography drives migratory flight altitude of golden eagles: implications for on-shore wind energy development. Journal of Applied Ecology 49: 1178-1186.

Katzner, T. E., Smith, B. W., Miller, T. A., Brandes, D., Cooper, J., Lanzone, M., Brauning, D., Farmer, C., Harding, S., Kramar, D. E., Koppie, C., Maisonneuve, C., Martell, M., Mojica, E. K., Todd, C., Tremblay, J. A., Wheeler, M., Brinker, D. F., Chubbs, T. E., Gubler, R., O"Malley, K., Mehus, S., Porter, B., Brooks, R. P., Watts, B. D., Bildstein, K. L. 2012. Status, biology, and conservation priorities for North America"s eastern Golden Eagle (Aquila chrysaetos) population. The Auk 129: 168-176.

Rich, T.D.; Beardmore, C.J.; Berlanga, H.; Blancher, P.J.; Bradstreet, M.S.W.; Butcher, G.S.; Demarest, D.W.; Dunn, E.H.; Hunter, W.C.; Inigo-Elias, E.E.; Martell, A.M.; Panjabi, A.O.; Pashley, D.N.; Rosenberg, K.V.; Rustay, C.M.; Wendt, J.S.; Will, T.C.

Watson, J. 2010. The Golden Eagle. T. & A.D. Poyser, London.

Further web sources of information
Detailed species account from Birds in Europe: population estimates trends and conservation status (BirdLife International 2004)

Detailed species account from Birds in Europe: population estimates, trends and conservation status (BirdLife International 2004)

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Text account compilers
Ekstrom, J., Butchart, S.

Recommended citation
BirdLife International (2014) Species factsheet: Aquila chrysaetos. Downloaded from http://www.birdlife.org on 18/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 18/09/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Golden eagle (Aquila chrysaetos) 0

Key facts
Current IUCN Red List category Least Concern
Family Accipitridae (Hawks, Eagles)
Species name author (Linnaeus, 1758)
Population size mature individuals
Population trend Stable
Distribution size (breeding/resident) 41,500,000 km2
Country endemic? No
Links to further information
- Additional Information on this species