LC
Grey-bellied Tesia Tesia cyaniventer



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
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
Species attributes

Migratory status altitudinal migrant Forest dependency high
Land-mass type Average mass 10 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 4,430,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 2.03 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 2% 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 less than 5%.

Trend justification:   .


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bangladesh extant native
Bhutan extant native
Cambodia 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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Laos Dakchung Plateau
Laos Phou Ahyon
Laos Xe Sap
Nepal Annapurna Conservation Area
Nepal Dhorpatan Hunting Reserve
Nepal Kanchenjungha Conservation Area
Nepal Khaptad National Park
Nepal Langtang National Park
Nepal Mai Valley forests
Nepal Makalu Barun National Park
Nepal Phulchoki Mountain forests
Thailand Doi Chiang Dao
Thailand Doi Inthanon
Thailand Mae Jarim National Park
Thailand Nanthaburi
Vietnam Che Tao
Vietnam Fan Si Pan
Vietnam Van Ban

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major non-breeding
Forest Subtropical/Tropical Moist Montane major resident
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) suitable resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Altitude 1500 - 2550 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Grey-bellied Tesia Tesia cyaniventer. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-bellied-tesia-tesia-cyaniventer 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.