Data Zone
Taxonomic note
Phylloscopus poliogenys (del Hoyo and Collar 2016) was previously listed as Seicercus poliogenys.
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 | altitudinal migrant | Forest dependency | high |
| Land-mass type | Average mass | 6 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 2,280,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | suspected | - |
| Generation length | 1.93 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is reported to be locally common (Baker 1997). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 10.5% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being 11-14%.
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Bhutan | extant | native | ||||
| China (mainland) | extant | native | ||||
| India | extant | native | ||||
| Laos | extant | native | yes | |||
| Myanmar | extant | native | ||||
| Nepal | extant | native | ||||
| Thailand | extant | native | ||||
| Vietnam | extant | native |
| Country/Territory | IBA Name |
|---|---|
| Laos | Dakchung Plateau |
| Laos | Nakai-Nam Theun |
| Laos | Nam Ha |
| Laos | Nam Xam |
| Laos | Phou Ahyon |
| Laos | Phou Loeuy |
| Laos | Xe Sap |
| Nepal | Annapurna Conservation Area |
| Nepal | Mai Valley forests |
| Nepal | Makalu Barun National Park |
| Thailand | Doi Suthep-Pui |
| Thailand | Mae Jarim National Park |
| Vietnam | Fan Si Pan |
| Vietnam | Van Ban |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Temperate | major | resident |
| Altitude | 130 - 2450 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Grey-cheeked Warbler Phylloscopus poliogenys. Downloaded from
https://datazone.birdlife.org/species/factsheet/grey-cheeked-warbler-phylloscopus-poliogenys 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.