22688927-1

Bubo bubo 

Scope: Europe
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Strigiformes Strigidae

Scientific Name: Bubo bubo (Linnaeus, 1758)
Regional Assessments:
Common Name(s):
English Eurasian Eagle-owl, Eurasian Eagle Owl, Eurasian Eagle-Owl
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.
Taxonomic Notes: Bubo bubo and B. ascalaphus (Sibley and Monroe 1990, 1993) are retained as separate species contra AERC TAC (2003) and Dowsett and Forbes-Watson (1993) who include ascalaphus as a subspecies of B. bubo.

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2015
Date Assessed: 2015-03-31
Assessor(s): BirdLife International
Reviewer(s): Symes, A.
Facilitator/Compiler(s): Ashpole, J, Burfield, I., Ieronymidou, C., Pople, R., Wheatley, H. & Wright, L
Justification:
European regional assessment: Least Concern (LC)
EU27 regional assessment: Least Concern (LC)

At both European and EU27 scales this species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 10% in ten years or three generations, or with a specified population structure). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (30% decline over ten years or three generations).

For these reasons the species is evaluated as Least Concern within both Europe and the EU27.

Geographic Range [top]

Countries occurrence:
Native:
Albania; Andorra; Armenia; Austria; Azerbaijan; Belarus; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Czech Republic; Denmark; Estonia; Finland; France; Georgia; Germany; Greece; Hungary; Italy; Latvia; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Moldova; Montenegro; Netherlands; Norway; Poland; Portugal; Romania; Russian Federation (European Russia); Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; Turkey; Ukraine
Vagrant:
Gibraltar
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:7190000
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:No
Upper elevation limit (metres):2000
Range Map:22688927-1

Population [top]

Population:The European population is estimated at 18,500-30,300 pairs, which equates to 36,900-60,600 mature individuals. The population in the EU27 is estimated at 12,500-17,900 pairs, which equates to 25,000-35,800 mature individuals. For details of national estimates, see the Supplementary Material.

Trend Justification:  In Europe and the EU27 the population size is estimated to be increasing. For details of national estimates, see attached PDF.
For further information about this species, see 22688927_bubo_bubo.pdf.
A PDF viewer such as Adobe Reader is required.
Current Population Trend:Increasing
Additional data:
Number of mature individuals:36900-60600,46400Continuing 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:This species inhabits mainly rocky country with cliffs and ravines, caves, patches of woodland, scattered trees or groves, generally in undisturbed wilderness areas. It also uses open forest, taiga and other types of woodland, wooded steppe, river valleys with gorges, overgrown quarries and farmland with suitable rocky areas or cliffs. The species is monogamous and breeds from February to August in Scandinavia, however egg-laying occurs in December in France. It nests on sheltered cliff ledges or in crevices, in a cave entrance, on the ground on steep slope or on flatter ground in taiga. Occasionally it uses old tree nests of other species and rarely in hole in tree. The same site is often used for several years or in rotation with other favoured sites. Clutches are usually two to four eggs (Holt et al. 2013). It feeds mostly on mammals from small rodents to hares and birds to the size of herons and buzzards, but it also consumes reptiles, frogs, fish and larger insects. It also preys on other owl species in its range (König 2008). The species is resident in most of its range and juveniles disperse over variable distances (Holt et al. 2013).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):12.1
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): Most declines are due to human activity. It is extremely sensitive and the slightest disturbance can cause the abandonment of the nest. Unfortunately cross-country skiing, mountaineering, alpinism and other leisure activities often take people unknowingly near nests (Tucker and Heath 1994). It suffers from human persecution and poisoning from mercury seed-dressings, and deaths through road traffic, barbed wire (Holt et al. 2013) and overhead wires (Tucker and Heath 1994) are not insignificant (Holt et al. 2013). These threats still persist despite its protected status in most countries (König 2008). A significant decline in Mediterranean countries in the 1960s is thought to be due to the effects of myxomatosis on rabbit populations (Holt et al. 2013). Egg-collectors impose a relatively high level of nest-robbing on the species (Tucker and Heath 1994).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CITES Appendix II. Bern Convention Appendix II. EU Birds Directive Annex I. The species is protected in most countries within its range (König 2008). Extensive reintroduction programmes, especially in Germany, France, Belgium, Switzerland and Scandinavia aided by protection have enabled recovery in parts of Europe since the 1970s. The species is also likely to have benefited from an increased food supply created by the proliferation of refuse tips and large clearfell areas, which have increased prey species populations (Holt et al. 2013).

Conservation Actions Proposed
Nesting territories, and potential territories, should be protected from development and from extensive logging (Holt et al. 2013). Awareness should be raised of the species's susceptibility to disturbance, particularly with the public, birdwatchers and photographers (Tucker and Heath 1994). Enforcement of protection should be strengthened.

Citation: BirdLife International. 2015. Bubo bubo. The IUCN Red List of Threatened Species 2015: e.T22688927A59996806. . Downloaded on 23 July 2018.
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