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Description |
Geographic Range [top]
Range Description: Clanga clanga occupies a fragmented range, breeding in Estonia (Lõhmus 1998), Poland, Belarus, Moldova, Russia, Ukraine, Kazakhstan, mainland China and Mongolia (Meyburg et al. 1999), and apparently regularly in tiny numbers in Pakistan and north-west India (BirdLife International 2001), with some individuals possibly still breeding in Finland, Latvia and Lithuania (Database of the Lithuanian Ornithological Society 1999), although this has not been confirmed recently. Passage or wintering birds occur in small numbers over a vast area, including central and eastern Europe, North Africa, East Africa, the Middle East, the Arabian peninsula, the Indian Subcontinent, south Asia and South-East Asia. Wintering birds have also been reported in Hong Kong (China). The population probably numbers fewer than 10,000 mature individuals with Russia holding 2,800-3,000 pairs. The European population is probably no more than 900 pairs (with c.150 pairs in Belarus). Numbers appear to have declined in the western half of its range and in some parts of its Asian range. However, long-term trends are difficult to assess owing to identification problems.
Countries occurrence:
Native:
Afghanistan; Albania; Armenia (Armenia); Austria; Azerbaijan; Bangladesh; Belarus; Bhutan; Bosnia and Herzegovina; Bulgaria; Cambodia; China; Croatia; Djibouti; Egypt; Eritrea; Estonia; Ethiopia; Finland; France; Georgia; Greece; Hong Kong; Hungary; India; Iran, Islamic Republic of; Iraq; Israel; Italy; Kazakhstan; Kenya; Korea, Democratic Peoples Republic of; Kuwait; Kyrgyzstan; Lao Peoples Democratic Republic; Latvia; Lebanon; Lithuania; Macao; Macedonia, the former Yugoslav Republic of; Malaysia; Moldova; Mongolia; Montenegro; Myanmar; Nepal; Oman; Pakistan; Palestinian Territory, Occupied; Poland; Qatar; Romania; Russian Federation; Saudi Arabia; Serbia (Serbia); Slovakia; Slovenia; South Sudan; Sudan; Syrian Arab Republic; Taiwan, Province of China; Tajikistan; Thailand; Turkey; Turkmenistan; Ukraine; United Arab Emirates; Viet Nam; Yemen
Possibly extinct:
Uzbekistan
Vagrant:
Bahrain; Belgium; Cameroon; Chad; Cyprus; Denmark; Gibraltar; Indonesia; Ireland; Japan; Jordan; Korea, Republic of; Libya; Luxembourg; Morocco; Netherlands; Portugal; Singapore; Spain; Switzerland; Tanzania, United Republic of; Tunisia; United Kingdom
Present - origin uncertain:
Mali; South Africa; Uganda; Zambia
Continuing decline in area of occupancy (AOO): Yes
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 8700000
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Number of Locations: 11-100
Continuing decline in number of locations: Yes
Extreme fluctuations in the number of locations: No
Upper elevation limit (metres): 1400
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: In Europe, the breeding population is estimated to number 810-1,100 breeding pairs, equating to 2,430-3,300 individuals (BirdLife International 2004). Europe forms 25-49% of the global range, so a very preliminary estimate of the global population size is 5,000-13,200 individuals in total, roughly equating to 3,300-8,800 mature individuals, although further validation of this estimate is needed. National population estimates include: c.100-10,000 breeding pairs, c.50-1,000 individuals on migration and c.50-1,000 wintering individuals in China; < c.50 individuals on migration and < c.50 wintering individuals in Taiwan and c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in Russia (Brazil 2009).
Trend Justification: This species is suspected to have undergone at least a moderately rapid decline over the last three generations as a result of habitat loss and degradation throughout its breeding and wintering ranges, together with the effects of disturbance, persecution and competition with other predators.
Current Population Trend: Decreasing
Additional data:
?Number of mature individuals: 3300-8800 ?Continuing decline of mature individuals: Yes
?Extreme fluctuations: No ?Population severely fragmented: No
?No. of subpopulations: 1 ?Continuing decline in subpopulations: Unknown
?Extreme fluctuations in subpopulations: No ?All individuals in one subpopulation: Yes
?No. of individuals in largest subpopulation: 100
Habitat and Ecology [top]
Habitat and Ecology: It occurs in lowland forests near wetlands, nesting in different types of (generally tall) trees, depending on local conditions. It feeds on unretrieved quarry, small mammals, waterbirds, frogs and snakes, hunting over swamps, wet meadows and, in Europe, over extensively managed agricultural land (A. Lõhmus in litt. 1999); birds soar to c.100 m high when hunting. It is a migratory species, with birds leaving their breeding grounds in October and November to winter in southern Europe, southern Asia and north-east Africa (del Hoyo et al. 1994). They tend to return in February and March. Birds migrate on a broad front, tending to pass in singles, twos and threes with the occasional larger group (Ferguson-Lees and Christie 2001). They do not concentrate at bottleneck sites to the extent of many other raptors such as Clanga pomarina (del Hoyo et al. 1994).
Systems: Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat: Yes
Generation Length (years): 16.60
Movement patterns: Full Migrant
Congregatory: Congregatory (and dispersive)
Threats [top]
Major Threat(s): There is strong evidence of hybridisation between this species and Lesser Spotted Eagle Clanga pomarina (Bergmanis et al. 1997, Lohmus and Vali 2001, Dombrovski 2002, Vali et al. 2010). In some European countries mixed pairs can constitute 50% of Greater Spotted Eagle pairs (Maciorowski and Mizera 2010) or even more (Vali 2011). It is unclear whether this represents a new phenomenon or a conservation concern, but A. pomarina is far more numerous than C. clanga in the zone of overlap, and the range of C. pomarina appears to be spreading east, further into the range of C. clanga. Other key threats are habitat destruction and disturbance, also poaching and electrocution can be considered important. Suitable habitat mosaics have been lost as a result of afforestation and wetland drainage. In eastern Europe, agricultural intensification and the abandonment of traditional floodplain management have reduced habitat quality (A. Lõhmus in litt. 1999). Birds are intolerant of permanent human presence in their territories. Forestry operations are a major cause of disturbance. Shooting is a threat in Russia, the Mediterranean, South-East Asia and Africa (P. D. Round in litt. 1998, P. Mirski in litt. 2012), together with deliberate and accidental poisoning across much of its range. In Israel, poisoning and electrocution are major causes for casualties of wintering population (Perlman and Granit 2012).
Conservation Actions [top]
Conservation Actions: Conservation Actions Underway
CITES Appendix II, CMS Appendix I and II. It is legally protected in Belarus, Estonia, France, Greece, Latvia, Poland, Romania and Russia and nominally in Thailand. An International Lesser and Greater Spotted Eagle Working Group has been established. A European action plan was published in 2000 (Meyburg et al. 1999). The first national census was conducted in Belarus during 2000-2002. Research into hybridisation and habitat requirements began in Belarus in 2003. National Action Plans for the species have been produced in Belarus (Dombrovski et al. (2002), Estonia and Ukraine (Domashevsky 2000). Site protection measures have been initiated at key Belarusian, Polish and Estonian sites, including restricting forestry activities at nest sites during the breeding season.
Conservation Actions Proposed
Survey range and population. Establish long-term monitoring schemes to improve understanding of population trends. Improve understanding of breeding habitat requirements. Protect breeding areas from drainage and rising of infrastructure. Maintain traditional wet meadows. Regulate forestry to minimise disturbance and protect potential nesting trees. Investigate potential threat of hybridisation with C. pomarina. Prevent illegal shooting, poisoning and electrocution. Investigate lead poisoning from feeding on quarry. Raise awareness.
Citation: BirdLife International. 2013. Clanga clanga. The IUCN Red List of Threatened Species 2013: e.T22696027A40759511. http://dx.doi.org/10.2305/IUCN.UK.2013-2.RLTS.T22696027A40759511.en. Downloaded on 20 January 2016.
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