Clamator glandarius 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Cuculiformes Cuculidae

Scientific Name: Clamator glandarius (Linnaeus, 1758)
Regional Assessments:
Common Name(s):
English Great Spotted Cuckoo
French Coucou-geai
Taxonomic Source(s): Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ashpole, J, Butchart, S., Ekstrom, 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 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.
Previously published Red List assessments:

Geographic Range [top]

Countries occurrence:
Albania; Algeria; Angola; Botswana; Bulgaria; Burkina Faso; Cameroon; Central African Republic; Chad; Congo, The Democratic Republic of the; Côte d'Ivoire; Croatia; Cyprus; Egypt; Eritrea; Ethiopia; France; Gambia; Ghana; Gibraltar; Greece; Guinea; Guinea-Bissau; Iran, Islamic Republic of; Iraq; Israel; Italy; Jordan; Kenya; Kuwait; Lebanon; Lesotho; Liberia; Macedonia, the former Yugoslav Republic of; Malawi; Mali; Malta; Mauritania; Montenegro; Morocco; Mozambique; Namibia; Niger; Nigeria; Palestinian Territory, Occupied; Portugal; Rwanda; Saudi Arabia; Senegal; Serbia; Sierra Leone; Somalia; South Africa; South Sudan; Spain; Sudan; Swaziland; Syrian Arab Republic; Tanzania, United Republic of; Togo; Tunisia; Turkey; Uganda; Zambia; Zimbabwe
Austria; Bahrain; Belgium; Benin; Bosnia and Herzegovina; Burundi; Congo; Denmark; Djibouti; Equatorial Guinea; Finland; Gabon; Germany; Ireland; Libya; Moldova; Netherlands; Norway; Oman; Poland; Qatar; Seychelles; Slovenia; Sweden; Switzerland; Turkmenistan; United Kingdom; Yemen
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:27900000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):500
Upper elevation limit (metres):2000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The European population is estimated at 84,100-252,000 pairs, which equates to 168,000-505,000 mature individuals (BirdLife International 2015). Europe forms c. 5% of the global range, so a very preliminary estimate of the global population size is 3,360,000-10,100,000 mature individuals, although further validation of this estimate is needed. The population is therefore placed in the band 3,000,000-10,499,999 mature individuals.

Trend Justification:  The population is suspected to be stable in the absence of evidence for any declines or substantial threats. The European population is estimated to be increasing (BirdLife International 2015).
Current Population Trend:Stable
Additional data:
Number of mature individuals:3000000-10499999Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:The species uses semi-arid open woodland, scrub, rocky hillsides in dry savannas and dry cultivation. In Europe the species favours savanna-like heathland, often with cork oak (Quercus suber) or stone pine (Pinus pinea), as well as olive groves. It is a brood parasite of crows and magpies in the Mediterranean, particularly Black-billed Magpie (Pica pica), Azure-winged Magpie (Cyanopica cyanea) and Carrion Crow (Corvus corone) in Spain and Egypt, Pied Crow (Corvus albus) in Africa and and in west, east and southern Africa it will also parasitise starling nests (Payne and Garcia 2013). The female can lay 12–25 eggs in one season, often laying several eggs per nest. It feeds on insects, mainly large hairy caterpillars, also termites, grasshoppers, moths and small lizards. The species is migratory. Most European birds migrate to Africa, wintering north of 10°N but possibly many move south of the Sahara; small numbers winter in southern Spain. Movements throughout range are poorly known as breeding and non-breeding birds are indistinguishable (Payne and Garcia 2013).
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):4.2
Movement patterns:Full Migrant

Threats [top]

Major Threat(s): Hunting and traffic accidents are the main causes of mortality in southern Europe. In Crete it is preyed upon by Eleonora's Falcon (Falco eleonorae) (Erritzøe et al. 2012).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
Bern Convention Appendix II. There are currently no known conservation measures in place for this species in Europe.

Conservation Actions Proposed
Research should be undertaken to assess the impact of hunting and traffic accidents to inform future conservation measures.

Citation: BirdLife International. 2016. Clamator glandarius. The IUCN Red List of Threatened Species 2016: e.T22683819A86113703. . Downloaded on 23 June 2018.
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