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

Taxonomic note
Machlolophus holsti (del Hoyo and Collar 2016) was previously listed as Parus holsti.

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2023	Least Concern
2016	Near Threatened	C1+2a(i)
2012	Near Threatened	C1+2a(i)
2008	Near Threatened	C1; C2a(i)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	16,800 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	poor	suspected	-
Generation length	2.68 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: Brazil (2009) estimated a population size of between c.100 and 10,000 breeding pairs, although the lower bound of this estimate is highly improbable given that there remains 10,000 km² of forest within its mapped range. eBird (2023) data suggest it is commonly encountered, although Severinghaus (2010) describe it as 'local'. The population size is not quantified here in the absence of robust data, however it is evaluated as unlikely to be especially small.

Trend justification: There are no direct population trend data for this species, although there has been no overall habitat loss in the past 20 years (per Global Forest Watch 2023, based on data from Hansen et al. [2013] and methods disclosed therein). Although it has historically been caught for the bird trade, there is no published evidence this is ongoing or occurring at a scale thought capable of causing a population reduction. In the absence of other threats, the population is suspected to be stable.

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

Country/Territory	IBA Name
Taiwan, China	Chuyanshan Nature Reserve
Taiwan, China	Dawushan Nature Reserve and Shuang-guei Lake Major Wildlife Habitat
Taiwan, China	Daxueshan, Xueshankeng, Wushikeng, Taichung City
Taiwan, China	Hapen and Fushan
Taiwan, China	Nengdan, Nantou County
Taiwan, China	North Section of Xueshan Mountain Range, Taoyuan City
Taiwan, China	Ruei-yan, Nantou County
Taiwan, China	Shei-Pa National Park
Taiwan, China	Shihmen Reservoir
Taiwan, China	Upstream Section of Beigang River, Nantou County
Taiwan, China	Yushan National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Urban Areas	suitable	non-breeding
Forest	Temperate	major	resident
Altitude	700 - 2500 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Unknown		Minority (<50%)		No decline		Unknown
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Minority (<50%)		Slow, Significant Declines		Past Impact
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Yellow Tit Machlolophus holsti. Downloaded from https://datazone.birdlife.org/species/factsheet/yellow-tit-machlolophus-holsti 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.