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 |
|---|---|---|
| 2018 | 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/Near Threatened | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 484,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | unknown | - | - | - |
| Generation length | 4.9 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as common in India and Myanmar and very local in China (del Hoyo et al. 2007).
Trend justification: The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| China (mainland) | extant | native | yes | |||
| India | extant | native | yes | |||
| Myanmar | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| India | Ango or Anko Hills |
| India | Balpakram Complex |
| India | Barail Range forests |
| India | Barail Wildlife Sanctuary |
| India | Blue Mountain (Phawngpui) National Park |
| India | Bunning Wildlife Sanctuary |
| India | Dailong Rongku Forest |
| India | Dzuku Valley |
| India | Fakim Wildlife Sanctuary and Saramati area |
| India | Intaki National Park |
| India | Kailam Wildlife Sanctuary |
| India | Kamlang Wildlife Sanctuary and Reserve Forest |
| India | Khonoma Nature Conservation and Tragopan Sanctuary |
| India | Lengteng Wildlife Sanctuary |
| India | Magu Thingbu |
| India | Mawphlang Sacred Grove |
| India | Mount Paona |
| India | Mount Zanibu |
| India | Mount Ziphu |
| India | Murlen National Park |
| India | Namdapha National Park |
| India | Nokrek National Park |
| India | Norpuh Reserve Forests |
| India | Pfutsero-Chizami |
| India | Puliebadze-Dzukou-Zapfu |
| India | Satoi Range |
| India | Shiroi Community Forest |
| India | Singhalila National Park |
| India | Upper Shillong |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Forest | Temperate | suitable | resident |
| Altitude | 900 - 2800 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Grey Sibia Heterophasia gracilis. Downloaded from
https://datazone.birdlife.org/species/factsheet/grey-sibia-heterophasia-gracilis 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.