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 |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2023 | Least Concern | |
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2004 | Least Concern | |
| 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 | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 91,500 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | suspected | - |
| Generation length | 3.8 years | - | - | - |
| Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The global population size has not been quantified, but the species is reported to be abundant to not uncommon locally (del Hoyo et al. 1997). It is assumed that there are multiple subpopulations, with at least those on Bioko separate from the mainland populations.
Trend justification: There are no direct assessments of the population trend of this species. It is highly forest-dependent, hence the abundance is inferred to be directly related to the area of forest cover within the range of the species. There has been little forest cover loss within the range of the species with approximately 2% having been lost over the three generation period up to and including 2021 (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). This rate has increased slightly in recent years, such that a forward projection of the mean annual rate of forest cover loss from the most recent five years results in a suspected 3% loss over the future three generations. On a precautionary basis the population is suspected to be declining at a slow rate.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Cameroon | extant | native | yes | |||
| Nigeria | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Cameroon | Bakossi mountains |
| Cameroon | Bali-Ngemba Forest Reserve |
| Cameroon | Mbi Crater Faunal Reserve - Mbingo forest |
| Cameroon | Mont Manengouba |
| Cameroon | Mount Cameroon and Mokoko-Onge |
| Cameroon | Mount Kupe |
| Cameroon | Mount Mbam |
| Cameroon | Mount Oku |
| Cameroon | Mount Rata and Rumpi Hills Forest Reserve |
| Equatorial Guinea | Basilé Peak National Park |
| Nigeria | Gashaka-Gumti National Park |
| Nigeria | Ngel-Nyaki Forest Reserve |
| Nigeria | Obudu Plateau |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Altitude | 1000 - 2500 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | 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: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Cameroon Olive-pigeon Columba sjostedti. Downloaded from
https://datazone.birdlife.org/species/factsheet/cameroon-olive-pigeon-columba-sjostedti 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.