Data Zone
Taxonomic note
Sylvietta leucophrys and S. chapini (del Hoyo and Collar 2016) were previously lumped as S. leucophrys following Dowsett and Forbes-Watson (1993) and Fishpool and Collar (2006).
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 | Not Recognised | |
| 2008 | Not Recognised | |
| 2007 | Not Recognised | |
| 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 | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 614,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | suspected | - |
| Generation length | 3.37 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as locally common to very rare (del Hoyo et al. 2006). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 10.1% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Burundi | extant | native | yes | |||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Kenya | extant | native | yes | |||
| Rwanda | extant | native | yes | |||
| Tanzania | extant | native | yes | |||
| Uganda | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Burundi | Bururi Forest Nature Reserve |
| Burundi | Kibira National Park |
| Congo, The Democratic Republic of the | Forests west of Lake Edward |
| Congo, The Democratic Republic of the | Itombwe Mountains |
| Congo, The Democratic Republic of the | Kahuzi-Biega National Park |
| Congo, The Democratic Republic of the | Mount Kabobo |
| Congo, The Democratic Republic of the | Virunga National Park |
| Kenya | Aberdare Mountains |
| Kenya | Cherangani Hills |
| Kenya | Kikuyu Escarpment forest |
| Kenya | Mau forest complex |
| Kenya | Mount Elgon (Kenya) |
| Kenya | Mount Kenya |
| Rwanda | Nyungwe National Park |
| Rwanda | Volcans National Park |
| Uganda | Bwindi Impenetrable National Park |
| Uganda | Echuya Forest Reserve |
| Uganda | Kasyoha-Kitomi Forest Reserve |
| Uganda | Kibale National Park |
| Uganda | Mgahinga Gorilla National Park |
| Uganda | Mount Elgon National Park |
| Uganda | Ruwenzori (Rwenzori) Mountains National Park |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Shrubland | Subtropical/Tropical High Altitude | major | resident |
| Altitude | 1290 - 2500 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: White-browed Crombec Sylvietta leucophrys. Downloaded from
https://datazone.birdlife.org/species/factsheet/white-browed-crombec-sylvietta-leucophrys 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.