LC
Grey Sibia Heterophasia gracilis



Taxonomy

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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
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
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 484,000 km2
Severely fragmented? no -
Population
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 distribution
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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
India Magu Thingbu
India Balpakram Complex
India Mawphlang Sacred Grove
India Nokrek National Park
India Norpuh Reserve Forests
India Upper Shillong
India Ango or Anko Hills
India Bunning Wildlife Sanctuary
India Dzuku Valley
India Kailam Wildlife Sanctuary
India Shiroi Community Forest
India Blue Mountain (Phawngpui) National Park
India Lengteng Wildlife Sanctuary
India Murlen National Park
India Fakim Wildlife Sanctuary and Saramati area
India Intaki National Park
India Khonoma Nature Conservation and Tragopan Sanctuary
India Mount Paona
India Mount Zanibu
India Mount Ziphu
India Pfutsero-Chizami
India Puliebadze-Dzukou-Zapfu
India Satoi Range
India Singhalila National Park
India Barail Wildlife Sanctuary
India Kamlang Wildlife Sanctuary and Reserve Forest
India Namdapha National Park
India Dailong Rongku Forest
India Barail Range forests

Habitats & altitude
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: Heterophasia gracilis. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-sibia-heterophasia-gracilis on 01/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 01/03/2024.