Vietnamese Cutia Cutia legalleni


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.

IUCN Red List criteria met and history
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
Species attributes

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Laos Phou Ahyon

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

Threats & impact
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
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
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
Ecosystem degradation

Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - non-trivial recent

Recommended citation
BirdLife International (2024) Species factsheet: Cutia legalleni. Downloaded from https://datazone.birdlife.org/species/factsheet/vietnamese-cutia-cutia-legalleni on 26/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 26/02/2024.