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

Taxonomic note
Previously placed in monotypic genus Geomalia (del Hoyo and Collar 2016) but shown by Olsson & Alström (2013) to be firmly nested within the current genus. Birds from N & SE Sulawesi described as subspecies matinangensis, but diagnostic characters weak and not apparent in all material. Monotypic.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2023	Least Concern
2016	Near Threatened	A2ce+3ce+4ce
2012	Near Threatened	A2ce+3ce+4ce
2008	Near Threatened	A2c,e; A3c,e; A4c,e
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
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)	157,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	poor	suspected	-
Generation length	3.97 years	-	-	-
Number of subpopulations	5-20	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not been quantified. It is described as 'uncommon and local' (Eaton et al. 2021) however is extremely unobtrusive and overlooked and much of its large range remains unvisited (eBird 2022). Given the large area (c.27,000 km²) of forest within its range and elevation the population size is very likely to exceed 10,000 mature individuals.

Trend justification: This species is confined to largely inaccessible montane forest above c.1,400 m, where forest cover loss over the past 20 years has been minimal and many remaining areas lie in protected areas. In the three generations (11.9 years; Bird et al. 2020) to 2021, forest cover loss in this species' range was equivalent to only c.1-2% (Global Forest Watch 2022, based on Hansen et al. [2013] and methods disclosed therein). In the future, the extent of forest cover is also predicted to remain relatively stable (Voigt et al. 2021). In the absence of any other threats, the population trend is suspected to be stable.

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

Country/Territory	IBA Name
Indonesia	Lore Lindu
Indonesia	Mekongga
Indonesia	Morowali
Indonesia	Pegunungan Latimojong

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1400 - 3500 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Geomalia Zoothera heinrichi. Downloaded from https://datazone.birdlife.org/species/factsheet/geomalia-zoothera-heinrichi on 31/12/2024.
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 31/12/2024.