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

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
-	-	C2a(i)

Red List history

Year	Category	Criteria
2020	Vulnerable	C2a(i)
2016	Vulnerable	C2a(i)
2014	Vulnerable	C2a(i)
2012	Endangered	C2a(i)
2008	Endangered	C2a(i)
2004	Endangered
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,300 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	poor	estimated	2014
Population trend	decreasing	poor	inferred	2010-2024
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	4.8 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The population size has been estimated to be as low as a few hundred pairs (Collar and van Balen 2002); however, it is easily overlooked, and there is still extensive forest east of Cibodas/Halimun that remains to be surveyed, thus it may be more common and widespread than recent observations suggest (B. van Balen in litt. 2013). Ornithological surveys across 27 sites on nine mountains in West-Central Java between 2018 and 2020 found the species at 20 sites and 7 mountains with a mean encounter rate of 0.32 groups/hour (C. Devenish, A.R. Junaid and S. Marsden in litt. 2020). It therefore seems likely that considerably more than 250 mature individuals occupy each of the large areas of forest at Gunung Gede and Halimun (C. Robson in litt. 2013). The species's population is therefore placed in the band for 2,500-9,999 mature individuals.

Trend justification: Although much of the population may be present across protected and non-protected areas on Java (A. Ridha in litt 2020), and forest loss has slowed to 1-3% (Tracewski etal. 2016, Global Forest Watch 2020) over three generations (14.4 years; Bird et al. 2020), it is nonetheless suspected to be continuing to decline at a moderate rate, owing to the on-going encroachment of forests by agriculture and urban development, as well as possible trapping pressure (A. A. Supriatna in litt. 2012, N. Brickle in litt 2012, B. van Balen in litt. 2013). Thus, the overall population is considered to be declining at a rate of 1-9% over three generations.

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

Country/Territory	IBA Name
Indonesia	Gunung Gede - Pangrango
Indonesia	Gunung Halimun
Indonesia	Gunung Masigit-Kareumbi
Indonesia	Gunung Papandayan-Kamojang
Indonesia	Gunung Salak
Indonesia	Gunung Tilu-Simpang
Indonesia	Telaga Warna-Cibulao

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	900 - 2500 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		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
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		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Energy production & mining	Renewable energy	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Negligible declines		No/Negligible Impact: 2
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Tourism & recreation areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Javan Trogon Apalharpactes reinwardtii. Downloaded from https://datazone.birdlife.org/species/factsheet/javan-trogon-apalharpactes-reinwardtii on 22/11/2024.
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 22/11/2024.