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

Taxonomic note

Trichoglossus haematodus, T. forsteni, T. capistratus, T. weberi, T. rubritorquis, T. moluccanus and T. rosenbergii (del Hoyo and Collar 2014) were previously lumped as T. haematodus following Christidis and Boles (1994), and before then were split as T. haematodus and T. rubritorquis following Sibley and Monroe (1990, 1993).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	A2d+3d+4d; C2a(i)	A2d+3d+4d; C2a(i); D1

Red List history

Year	Category	Criteria
2020	Endangered	A2d+3d+4d; C2a(i)
2016	Vulnerable	C2a(i)
2014	Near Threatened	A2cd+3cd+4cd
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	nomadic	Forest dependency	low
Land-mass type		Average mass	130 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	34,500 km2	medium
Number of locations	10-19	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	500-1500 mature individuals	poor	suspected	2020
Population trend	decreasing	-	inferred	2010-2025
Rate of change over the past 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Generation length	5 years	-	-	-
Number of subpopulations	3-5	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: Population density estimates of the congener Coconut Lorikeet (Trichoglossus haematodus) number 1.9-33 individuals/km² for Sumbawa (Marsden 1999). Assuming that 10% of the mapped range is occupied by the species, Scarlet-breasted Lorikeet may therefore number 2,100-37,000 individuals, roughly equating to 1,400-25,000 mature individuals. However, the population is thought to number closer to the lower end of the estimate, and considering the known rarity of the species due to increasing pressure from trapping for trade, the population is suspected to be below 1,500 mature individuals. Thus, population size is tentatively placed here in the band of 500-1,500 mature individuals. It is further considered that the largest population on Sumbawa may not exceed 250 mature individuals.

Trend justification: The population is suspected to be undergoing a rapid decline of 50-79% over a three-generation period (15 years; Bird et al. 2020) owing to unsustainable levels of exploitation.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Artificial/Terrestrial	Urban Areas	suitable	resident
Forest	Subtropical/Tropical Mangrove Vegetation Above High Tide Level	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Forest	Subtropical/Tropical Swamp	suitable	resident
Shrubland	Subtropical/Tropical Dry	suitable	resident
Shrubland	Subtropical/Tropical Moist	suitable	resident
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	resident
Altitude	0 - 700 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species disturbance, Ecosystem degradation, Ecosystem conversion, Species mortality
Agriculture & aquaculture	Wood & pulp plantations - Agro-industry plantations	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Very Rapid Declines		Medium Impact: 7
		Stresses Species mortality
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Species mortality
Natural system modifications	Other ecosystem modifications	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance, Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Food - human	subsistence, national
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Scarlet-breasted Lorikeet Trichoglossus forsteni. Downloaded from https://datazone.birdlife.org/species/factsheet/scarlet-breasted-lorikeet-trichoglossus-forsteni on 18/12/2024.
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 18/12/2024.