• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

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

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,700,000 km2
Severely fragmented?	no	-

	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	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Indonesia	extant	native	yes
Malaysia	extant	native	yes

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

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

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

Purpose	Scale
Pets/display animals, horticulture	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Indigo Flycatcher Eumyias indigo. Downloaded from https://datazone.birdlife.org/species/factsheet/indigo-flycatcher-eumyias-indigo on 23/11/2024.
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 23/11/2024.