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

Taxonomic note

Previously placed in genus Rimator (del Hoyo and Collar 2016) but moved to current genus following Cai et al. (2019). N. danjoui and N. naungmungensis were previously lumped as Jabouilleia danjoui following Sibley & Monroe (1990, 1993).

Given species rank in original description (Rappole et al. 2005) but treated as subspecies in HBW owing in part to mistaken claim of morphometric differences (Collar & Pilgrim 2007, Collar 2011); however, single recording reveals a song or call very different from any recording of N. danjoui, involving a much higher maximum frequency (3), a rising whistle (pitch change 3) and shorter note length (ns1), and this, combined with darker overall colour (1), stronger-marked moustachial and malar lines (1) and faint soft-edged ochreish vs well-defined brown-streaked breastband (2), returns the form provisionally to species rank (this may be forfeit if more recordings reveal that call or song scored above is shared by N. danjoui). 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
-	-	D1

Red List history

Year	Category	Criteria
2021	Near Threatened	D1
2016	Vulnerable	C2a(ii)
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,800 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	500-2500 mature individuals	poor	suspected	2016
Population trend	stable	poor	suspected	-
Generation length	2.7 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The species is thought to be largely restricted to the Naung Mung area, but recently it has been reported from Dehong, in Yunnan (China) (Liu & Chen 2021 per D. L. Yong in litt. 2021). Consequently the population size is even less certain than previously, when the very small and patchy occurrence indicated that it was likely to be very small. It remains possible that there are fewer than 1,000 mature individuals, given the patchiness but it is now more plausible that the population is considerably larger. Given the level of uncertainty over population size, it is best placed in a wide range, and is here considered only that it is most likely to fall between 500-2,500 mature individuals. Further area-based sampling in different areas in the range is needed to refine the population estimate.

Trend justification: Forest loss was previously thought to be significant in this region, but recent remote-sensing forest cover loss estimates indicate there has been less than 1% lost over the past 10 years (Tracewski et al. 2016, Global Forest Watch 2020). No other threats are known: it is not believed to be trapped. The highly restricted range may expose it to impacts of climate change, though these have not been evaluated for the species as yet. In the absence of any clear threats the species's population trend is considered most likely to be stable.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	50 - 2100 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%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Naung Mung Wren-babbler Napothera naungmungensis. Downloaded from https://datazone.birdlife.org/species/factsheet/naung-mung-wren-babbler-napothera-naungmungensis on 22/12/2024.
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 22/12/2024.