Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | 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 | low |
| Land-mass type | Average mass | 8 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 1,340,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | stable | - | suspected | - |
| Generation length | 2.02 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as locally common (Clement 1999). The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Burundi | extant | uncertain | ||||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Rwanda | extant | native | yes | |||
| Tanzania | extant | native | yes | |||
| Uganda | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Burundi | Ruvubu National Park |
| Burundi | Rwihinda Lake Managed Nature Reserve |
| Congo, The Democratic Republic of the | Virunga National Park |
| Rwanda | Akagera National Park |
| Rwanda | Akanyaru wetlands |
| Rwanda | Nyabarongo wetlands |
| Rwanda | Rugezi Marsh |
| Tanzania | Minziro Forest Reserve |
| Uganda | Bwindi Impenetrable National Park |
| Uganda | Kasyoha-Kitomi Forest Reserve |
| Uganda | Kibale National Park |
| Uganda | Nyamuriro swamp |
| Uganda | Queen Elizabeth National Park and Lake George |
| Uganda | Sango Bay area |
| Uganda | Semliki National Park |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Shrubland | Subtropical/Tropical Moist | suitable | resident |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | resident |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | resident |
| Altitude | 1000 - 1970 m | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: White-collared Oliveback Nesocharis ansorgei. Downloaded from
https://datazone.birdlife.org/species/factsheet/white-collared-oliveback-nesocharis-ansorgei 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.