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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 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) | 4,700,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 3000-45000 mature individuals | poor | estimated | 2009 |
| Population trend | decreasing | - | suspected | - |
| Generation length | 10.1 years | - | - | - |
Trend justification: The overall population trend is decreasing, although some populations have unknown trends (Wetlands International 2006).
| 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 | |||
| Equatorial Guinea | extant | uncertain | yes | |||
| Gabon | extant | native | yes | |||
| Ghana | extant | native | yes | |||
| Kenya | extant | native | yes | |||
| Liberia | extant | native | yes | |||
| São Tomé e Príncipe | extant | native | yes | |||
| Sierra Leone | extant | native | yes | |||
| Tanzania | extant | native | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | major | resident |
| Altitude | 0 - 3700 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Olive Ibis Bostrychia olivacea. Downloaded from
https://datazone.birdlife.org/species/factsheet/olive-ibis-bostrychia-olivacea on 18/12/2024.
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 18/12/2024.