NT
Blue-chinned Barbet Eubucco glaucogularis



Taxonomy

Taxonomic note

Eubucco versicolor, E. steerii and E. glaucogularis (del Hoyo and Collar 2014) were previously lumped as E. versicolor following Sibley and Monroe (1990, 1993).

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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - C2a(ii)

Red List history
Year Category Criteria
2021 Near Threatened C2a(ii)
2016 Near Threatened A2c+3c+4c; C2a(ii)
2014 Near Threatened A2c+3c+4c; C2a(ii)
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Average mass 33 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 38,600 medium
Extent of Occurrence breeding/resident (km2) 15,500
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 5000-40000 poor inferred 2021
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 1-19 - - -
Decline (10 years/3 generation past and future) 1-19 - - -
Number of subpopulations 1 - - -
Percentage in largest subpopulation 100 - - -

Population justification: The global population size has not been quantified directly, but the species is described as 'uncommon' (Stotz et al. 1996). Congeners are known to occur at a density of 1-8 mature individuals/km2 (Eubucco richardsoni and E. tucinkae in Peru; Santini et al. 2018). About 10,000 km2 within the range is covered by forest (Global Forest Watch 2021); assuming that 50% is occupied by this species, the population may number 5,000-40,000 mature individuals. In view of its apparent rarity, the true population size may be closer to the lower end of the estimate.

The species is monotypic; therefore it is tentatively assessed as functioning as one subpopulation.

Trend justification: The population trend has not been assessed directly, but it is inferred that this strictly forest-dependent species is undergoing a decline due to the loss and degradation of forests within the range. Over the past ten years, tree cover within the range has been lost at a rate of 6% (Global Forest Watch 2021). Based on deforestation rates between 2016 and 2020 and extrapolating into the future, the rate of tree cover loss may increase to 8% over the next ten years (Global Forest Watch 2021). Given that the species is highly dependent on forest and potentially susceptible to fragmentation and edge-effects, the rate of population decline may be higher than the rate of forest loss and as such the species may be declining at up to 19% over ten years.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Peru N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Peru Cordillera Vilcabamba
Peru Cordillera Yanachaga

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1000 - 2000 m Occasional altitudinal limits 675 - 2500 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2023) Species factsheet: Eubucco glaucogularis. Downloaded from http://www.birdlife.org on 08/02/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 08/02/2023.