LC
Indigo Flycatcher Eumyias indigo



Taxonomy

Taxonomic note
Eumyias indigo and E. ruficrissa were previously split (del Hoyo and Collar 2016), and prior to that were lumped as E. indigo following Sibley and Monroe (1990, 1993). Taxon ruficrissa differs from indigo in its plain deep blue throat to mid-belly vs shining turquoise-blue throat and upper breast and duller, darker turquoise-blue mid-belly (3); bluer, less green-tinged upperparts (ns1); buffy-rufous to ochraceous-rufous vs white undertail-coverts (2); broader black frontal band (1); whitish-blue vs pale turquoise-blue crown-flash (ns1); slightly shorter bill (sample size small, but allow 1); however the songs are similar (Boesman 2016) and re-examination of specimen material suggests that differences may be less pronounced than previously thought. Three subspecies recognized.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2023. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 8. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v8_Dec23.zip.

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

Red List history
Year Category Criteria
2023 Least Concern
2016 Not Recognised
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 not a migrant Forest dependency high
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,700,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected 2017-2028
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-9% - - -
Generation length 3.58 years - - -
Number of subpopulations 3-20 - - -
Percentage of mature individuals in largest subpopulation 1-89% - - -

Population justification: The population size is unknown, but the species is described as common to fairly common and locally abundant in Sumatra (del Hoyo et al. 2006).

Trend justification: There are no data on population trends, however remote sensing data indicate that forest loss within the range is occurring at a rate equivalent to c.4% over three generations (Global Forest Watch 2023, using data from Hansen et al. [2013] and methods disclosed therein). As a forest-dependent species the population is suspected to be in slow decline, tentatively placed here in the range 1-9% in three generations.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Indonesia extant native yes
Malaysia extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Malaysia Kelabit Highlands
Malaysia Lanjak Entimau Wildlife Sanctuary
Malaysia Maliau Basin Conservation Area
Malaysia Mount Kinabalu
Malaysia Mulu - Buda Protected Area
Malaysia Trus Madi Range

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 825 - 3000 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
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 - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Scale
Pets/display animals, horticulture subsistence, national

Recommended citation
BirdLife International (2024) Species factsheet: Indigo Flycatcher Eumyias indigo. Downloaded from https://datazone.birdlife.org/species/factsheet/indigo-flycatcher-eumyias-indigo 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.