LC
Hill Blue-flycatcher Cyornis banyumas



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
2019 Least Concern
2016 Least Concern
2013 Least Concern
2012 Least Concern
2010 Least Concern
2008 Not Recognised
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 6,550,000
Extent of Occurrence non-breeding (km2) 7,090,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 1-9 - - -
Decline (10 years/3 generation past and future) 1-9 - - -
Number of subpopulations - - -
Largest subpopulations - - -

Population justification: The population size is unknown, but the species is described as common or locally common throughout much of South-East Asia, very common in Thailand and Peninsular Malaysia and common in Borneo and Sumatra (del Hoyo et al. 2006).

Trend justification: A remote sensing study found that forest within its range is lost at a rate of 3% over three generations (Tracewski et al. 2016). The species is moreover moderately targeted for the cagebird trade; subspecies banyumas on Java is now reported on the markets in large numbers, but rarely recorded in the wild (D. Jeggo in litt. 2018). Therefore, the species is assumed to be undergoing a slow decline of <10%.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Brunei N Extant Yes
Cambodia N Extant Yes
China (mainland) N Extant Yes
India N Extant Yes
Indonesia N Extant Yes
Laos N Extant Yes
Malaysia N Extant Yes
Myanmar N Extant Yes
Thailand N Extant Yes
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Rural Gardens suitable breeding
Artificial/Terrestrial Rural Gardens suitable non-breeding
Artificial/Terrestrial Urban Areas suitable breeding
Artificial/Terrestrial Urban Areas suitable non-breeding
Forest Subtropical/Tropical Moist Lowland major breeding
Forest Subtropical/Tropical Moist Lowland major non-breeding
Forest Subtropical/Tropical Moist Montane major breeding
Forest Subtropical/Tropical Moist Montane major non-breeding
Shrubland Subtropical/Tropical Moist suitable breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Motivation Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2021) Species factsheet: Cyornis banyumas. Downloaded from http://www.birdlife.org on 09/03/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 09/03/2021.