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 |
|---|---|---|
| 2018 | Least Concern | |
| 2016 | Least Concern |
| Migratory status | altitudinal migrant | Forest dependency | Medium |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 282,000 | |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | unknown | not applicable | not applicable | 0 |
| Population trend | Stable | suspected | - | |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 4.2 | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as common in the Himalayas (Harrap and Quinn 1996).
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Bhutan | N | Extant | Yes | |||
| China (mainland) | N | Extant | Yes | |||
| Nepal | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Nepal | Annapurna Conservation Area |
| Nepal | Kanchenjungha Conservation Area |
| Nepal | Langtang National Park |
| Nepal | Mai Valley forests |
| Nepal | Makalu Barun National Park |
| Nepal | Sagarmatha National Park |
| Nepal | Tamur valley and watershed |
| 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 | Occasional altitudinal limits |
Recommended citation
BirdLife International (2021) Species factsheet: Aegithalos iouschistos. Downloaded from
http://www.birdlife.org on 21/10/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 21/10/2021.
