• 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., 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
2021	Near Threatened	C1
2019	Near Threatened	C1
2016	Near Threatened	B1ab(ii,iii,iv,v)
2012	Near Threatened	B1ab(ii,iii,iv,v)
2008	Near Threatened	B1a+b(ii,iii,iv,v)
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)	98,300 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-19999 mature individuals	poor	inferred	2020
Population trend	decreasing	poor	inferred	2015-2025
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Generation length	3.5 years	-	-	-
Number of subpopulations	2	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not previously been quantified, but within the restricted range the species is described as locally common (Collar and Robson 2020). Based on the extent of suitable habitat within the range and altitude used by the species, and using density estimates for close relatives with a similar body size, a preliminary population size estimate is between 18,091 - 37,037 individuals. This equates to 12,061-24,691 mature individuals, placed in the population band 10,000-20,000 mature individuals. This is an uncertain estimate, with the observation that while locally common where observed, the species was recorded much less frequently than other sympatric members of Leiotrichidae for which densities have been estimated, such as Dark-backed Sibia (Hill et al. 2001).

Trend justification: Deforestation data indicates that the area of suitable habitat is declining, on average, by around 5-10% (Tracewski et al. 2016; Global Forest Watch 2020) over three generations (10.5 years; Bird et al. 2020). Assuming that population declines are proportional to habitat loss, it is therefore unlikely that the decline approaches the threshold for listing as threatened under the population decline criterion (at least a 30% decline over 10 years or 3 generations). However, as the species is trapped for the pet trade (particularly in De Lat; Le Manh Hung in litt. 2020), the species may be declining faster than rates of forest loss alone. Thus, the population is suspected to be undergoing a slow decline of c. 1-19% over three generations.

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

Country/Territory	IBA Name
Laos	Phou Ahyon

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1200 - 2100 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance, Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation

Purpose	Scale
Pets/display animals, horticulture	national

---

Recommended citation
BirdLife International (2024) Species factsheet: Vietnamese Cutia Cutia legalleni. Downloaded from https://datazone.birdlife.org/species/factsheet/vietnamese-cutia-cutia-legalleni 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.