Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | C2a(i) |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Vulnerable | C2a(i) |
| 2016 | Near Threatened | C1 |
| 2012 | Near Threatened | C1 |
| 2008 | Near Threatened | C1 |
| 2004 | Near Threatened | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type |
continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 3,450,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 1500-7000 mature individuals | poor | suspected | 2007 |
| Population trend | decreasing | - | inferred | - |
| Generation length | 11.6 years | - | - | - |
| Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: This species may require large areas of good quality habitat and occur at low densities (H. Rainey in litt. 2018). Thus it may have a small population, possibly below 10,000 individuals. It is placed in the band 2,500-9,999 individuals, equating to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals, with no subpopulation expected to contain >1,000 mature individuals.
Trend justification: The population is inferred to be declining owing to forest clearance within parts of its range. Deforestation analysis by Tracewski et al. (2016) estimated an annual decline in forest cover within this species’s range to be c.0.2% between 2000 and 2012, which would roughly equate to a decline of 6.4% over three generations (c.35 years). However, the extended anthropogenic impacts on the species, e.g. loss of prey populations due to hunting may be contributing to even higher declines (H. Rainey in litt. 2018). Therefore, while we may be confident in inferring a continuing decline in this species, the rate at which it is declining is uncertain.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Cameroon | extant | native | yes | |||
| Congo | extant | native | yes | |||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Côte d'Ivoire | extant | native | yes | |||
| Gabon | extant | native | yes | |||
| Ghana | extant | native | yes | |||
| Liberia | extant | native | yes | |||
| Sierra Leone | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Congo | Dimonika Biosphere Reserve |
| Congo, The Democratic Republic of the | Okapi Faunal Reserve |
| Côte d'Ivoire | Mount Nimba Strict Nature Reserve |
| Côte d'Ivoire | Parc National de Taï et Réserve de faune du N'Zo |
| Gabon | Ipassa Strict Nature Reserve |
| Liberia | Lofa-Gola-Mano Complex |
| Liberia | Nimba mountains |
| Liberia | Zwedru |
| Sierra Leone | Gola Forests |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Shelley's Eagle-owl Bubo shelleyi. Downloaded from
https://datazone.birdlife.org/species/factsheet/shelleys-eagle-owl-bubo-shelleyi on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.