Data Zone
Taxonomic note
Aegithalos iouschistos and A. bonvaloti (del Hoyo and Collar 2016) were previously lumped as A. iouschistos following Sibley & Monroe (1990, 1993).
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 | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | altitudinal migrant | Forest dependency | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 728,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | suspected | - |
| Generation length | 2.13 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as uncommon in China, although very common in south-western Sichuan province and abundant in Tibet (Harrap and Quinn 1996). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 1.5% 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 |
|---|---|---|---|---|---|---|
| China (mainland) | extant | native | yes | |||
| Myanmar | extant | native | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Forest | Temperate | major | resident |
| Shrubland | Subtropical/Tropical High Altitude | suitable | resident |
| Shrubland | Temperate | suitable | resident |
| Altitude | 1000 - 3760 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Black-browed Tit Aegithalos bonvaloti. Downloaded from
https://datazone.birdlife.org/species/factsheet/black-browed-tit-aegithalos-bonvaloti on 23/11/2024.
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 23/11/2024.