|Scientific Name:||Circus cyaneus (Linnaeus, 1766)|
|Taxonomic Source(s):||del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.|
Circus cyaneus and C. hudsonius (del Hoyo and Collar 2014) were previously lumped as C. cyaneus following Sibley and Monroe (1990, 1993).
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Butchart, S. & Symes, A.|
|Facilitator/Compiler(s):||Butchart, S., Ekstrom, J., Symes, A., Taylor, J. & Ashpole, J|
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 size has not been quantified, but it is not believed to 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). The population trend is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds under the population trend criterion (>30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
|Previously published Red List assessments:|
Native:Afghanistan; Albania; Algeria; Armenia; Austria; Azerbaijan; Bangladesh; Belarus; Belgium; Bhutan; Bosnia and Herzegovina; Bulgaria; Cambodia; China; Croatia; Cyprus; Czech Republic; Denmark; Egypt; Estonia; Finland; France; Georgia; Germany; Gibraltar; Greece; Hong Kong; Hungary; India; Iran, Islamic Republic of; Iraq; Ireland; Israel; Italy; Japan; Jordan; Kazakhstan; Korea, Democratic People's Republic of; Korea, Republic of; Kuwait; Kyrgyzstan; Lao People's Democratic Republic; Latvia; Lebanon; Libya; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Malta; Moldova; Mongolia; Montenegro; Morocco; Myanmar; Nepal; Netherlands; Norway; Oman; Pakistan; Palestinian Territory, Occupied; Poland; Portugal; Qatar; Romania; Russian Federation (Central Asian Russia, Eastern Asian Russia, European Russia); Saudi Arabia; Serbia; Slovakia; Slovenia; Spain (Canary Is.); Sweden; Switzerland; Syrian Arab Republic; Taiwan, Province of China; Tajikistan; Thailand; Tunisia; Turkey; Turkmenistan; Ukraine; United Arab Emirates; United Kingdom; Uzbekistan; Viet Nam
Vagrant:Andorra; Bahrain; Iceland; Malaysia; Senegal; Singapore; Sudan; Yemen
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The European population is estimated at 30,000-54,400 breeding females, which equates to 60,000-109,000 mature individuals (BirdLife International 2015). Europe forms approximately 34% of the global range, so a very preliminary estimate of the global population size is 176,000-321,000 mature individuals, although further validation of this estimate is needed. It is placed in the band 100,000 to 499,999 mature individuals.|
Trend Justification: The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes. However in Europe the population size is estimated and projected to be decreasing at a rate approaching 30% over the period from 2000, when the decline is estimated to have started in Russia, which holds 70% of the European population, to 2024 (three generations) (BirdLife International 2015).
|Current Population Trend:||Decreasing|
|Major Threat(s):||The current main threat is the transformation of habitat owing to intensified agriculture, disappearance of marshes and reafforestation. Persecution is still severe locally, for example on managed grouse moors of Scotland; in 2013 not a single pair successfully nested in England (Pitches 2013), despite the fact that there is estimated habitat for more than 300 pairs (Fielding et al. 2011). The species is also shot illegally in central and eastern Europe (Tucker and Heath 1994). In the Czech Republic, wild boar Sus scrofa may pose a major threat to nesting birds (Kren 2000 in Global Raptor Information Network 2015).|
BirdLife International. 2015. European Red List of Birds. Office for Official Publications of the European Communities, Luxembourg.
Brazil, M. 2009. Birds of East Asia: eastern China, Taiwan, Korea, Japan, eastern Russia. Christopher Helm, London.
Fielding, A., Haworth, P., Whitfield, P., McLeod, D. and Riley, H. 2011. A Conservation Framework for Hen Harriers in the United Kingdom. JNCC Report 441. Joint Nature Conservation Committee, Peterborough.
Global Raptor Information Network. 2015. Species account: Hen Harrier Circus cyaneus. Available at: http://www.globalraptors.org/grin/SpeciesResults.asp?specID=8206. (Accessed: 06/07/2015).
Hagemeijer, E.J.M. and Blair, M.J. 1997. The EBCC atlas of European breeding birds: their distribution and abundance. T. and A. D. Poyser, London.
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-3. Available at: www.iucnredlist.org. (Accessed: 07 December 2016).
Orta, J., Kirwan, G.M., Boesman, P., Marks, J.S., Garcia, E.F.J. and Sharpe, C.J. 2014. Hen Harrier (Circus cyaneus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. and de Juana, E. (eds), Handbook of the Birds of the World Alive, Lynx Edicions, Barcelona.
Pitches, A. 2013. England's Hen Harriers: extinct in 2013? British Birds 106(1): 3.
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. and Will, T.C. 2004. Partners in flight: North American landbird conservation plan. Cornell Lab of Ornithology, Ithaca, NY.
Tucker, G.M. and Heath, M.F. 1994. Birds in Europe: their conservation status. BirdLife International, Cambridge, U.K.
|Citation:||BirdLife International. 2016. Circus cyaneus. The IUCN Red List of Threatened Species 2016: e.T22727733A94958761.Downloaded on 17 March 2018.|
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