LC
Hen Harrier Circus cyaneus



Taxonomy

Taxonomic note

Circus cyaneus and C. hudsonius (del Hoyo and Collar 2014) were previously lumped as C. cyaneus following Sibley and Monroe (1990, 1993).

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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2014 Least Concern
Species attributes

Migratory status full migrant Forest dependency Low
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 34,800,000 medium
Extent of Occurrence non-breeding (km2) 52,200,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 100000-499999 2012
Population trend Decreasing estimated -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 7.8 - - -

Population justification: 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).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Afghanistan N Extant Yes
Albania N Extant Yes
Algeria N Extant
Andorra V Extant
Armenia N Extant Yes
Austria N Extant Yes
Azerbaijan N Extant Yes
Bahrain V Extant Yes
Bangladesh N Extant
Belarus N Extant Yes
Belgium N Extant Yes Yes
Bhutan N Extant
Bosnia and Herzegovina N Extant
Bulgaria N Extant Yes Yes
Cambodia N Extant
China (mainland) N Extant Yes
Croatia N Extant Yes Yes
Cyprus N Extant Yes Yes
Czechia N Extant Yes
Denmark N Extant Yes Yes
Egypt N Extant
Estonia N Extant Yes
Finland N Extant Yes Yes
France N Extant Yes Yes
Georgia N Extant Yes Yes
Germany N Extant Yes Yes
Gibraltar (to UK) N Extant
Greece N Extant Yes Yes
Hong Kong (China) N Extant
Hungary N Extant Yes
Iceland V Extant
India N Extant
Iran, Islamic Republic of N Extant Yes
Iraq N Extant Yes
Ireland N Extant Yes
Israel N Extant
Italy N Extant Yes Yes
Japan N Extant
Jordan N Extant Yes Yes
Kazakhstan N Extant
Kuwait N Extant Yes
Kyrgyzstan N Extant
Laos N Extant
Latvia N Extant Yes
Lebanon N Extant Yes Yes
Libya N Extant
Liechtenstein N Extant Yes
Lithuania N Extant Yes
Luxembourg N Extant Yes
Malaysia V Extant
Malta N Extant
Moldova N Extant Yes
Mongolia N Extant Yes
Montenegro N Extant Yes
Morocco N Extant
Myanmar N Extant
Nepal N Extant
Netherlands N Extant Yes
North Korea N Extant
North Macedonia N Extant Yes
Norway N Extant Yes
Oman N Extant Yes Yes
Pakistan N Extant
Palestinian Authority Territories N Extant
Poland N Extant Yes Yes
Portugal N Extant Yes
Qatar N Extant Yes
Romania N Extant Yes Yes
Russia N Extant Yes
Russia (Asian) N Extant Yes
Russia (Central Asian) N Extant Yes
Russia (European) N Extant Yes Yes
Saudi Arabia N Extant Yes
Senegal V Extant
Serbia N Extant Yes
Singapore V Extant
Slovakia N Extant Yes Yes
Slovenia N Extant Yes
South Korea N Extant
Spain N Extant Yes Yes
Sudan V Extant Yes
Sweden N Extant Yes Yes
Switzerland N Extant Yes
Syria N Extant Yes
Taiwan, China N Extant
Tajikistan N Extant
Thailand N Extant
Tunisia N Extant
Turkey N Extant Yes
Turkmenistan N Extant
Ukraine N Extant Yes Yes
United Arab Emirates N Extant Yes
United Kingdom N Extant Yes
Uzbekistan N Extant
Vietnam N Extant
Yemen V Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable non-breeding
Artificial/Terrestrial Pastureland suitable breeding
Artificial/Terrestrial Plantations suitable breeding
Forest Boreal suitable breeding
Grassland Subtropical/Tropical Dry suitable non-breeding
Grassland Temperate suitable non-breeding
Grassland Temperate suitable breeding
Shrubland Boreal suitable breeding
Shrubland Temperate suitable non-breeding
Shrubland Temperate suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Altitude 0 - 3000 m Occasional altitudinal limits (max) 5000 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success
Natural system modifications Dams & water management/use Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - - Non-trivial Recent
Pets/display animals, horticulture - - - Non-trivial Recent
Sport hunting/specimen collecting - - - Non-trivial Recent
Sport hunting/specimen collecting - - - Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Circus cyaneus. Downloaded from http://www.birdlife.org on 21/10/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/10/2019.