VU
Orange-throated Tanager Wetmorethraupis sterrhopteron



Taxonomy

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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - B1ab(ii,iii,iv)

Red List history
Year Category Criteria
2024 Vulnerable B1ab(ii,iii,iv)
2016 Vulnerable B1ab(i,ii,iii,v)
2012 Vulnerable B1ab(i,ii,iii,v)
2008 Vulnerable B1a+b(i,ii,iii,v)
2004 Vulnerable
2000 Vulnerable
1996 Endangered
1994 Endangered
1988 Near Threatened
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 12,900 km2 medium
Area of Occupancy (breeding/resident) 9,500 km2
Number of locations 6-10 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2500-9999 mature individuals poor suspected 2023
Population trend decreasing poor suspected 2017-2028
Rate of change over the past 10 years/3 generations (longer of the two periods) 10-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 10-19% - - -
Generation length 3.69 years - - -
Number of subpopulations 1 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: The species is uncommon and local (Schulenberg et al. 2007, N. Krabbe in litt. 2010). Due to the low number of records within the range (eBird 2023), the population is tentatively suspected to number 2,500-9,999 mature individuals; the species may however be underrecorded and an accurate quantification of the population is urgently required.

Trend justification: The population trend has not been investigated, but declines are suspected on the basis of widespread forest destruction within the range.
Over the past three generations (11.1 years), a total of 4% of tree cover has been lost within the range; since 2017 this has been increasing to a rate equivalent to 6% over three generations (Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). Logging hotspots appear to be concentrated along rivers (Global Forest Watch 2023); deforestation may accelerate further given that riverbanks are relatively easy to access, spreading inland from there. The rate of tree cover loss (as per Global Forest Watch 2023) does not account for additional impacts of forest degradation and disturbance, and consequently the overall rates of habitat loss and subsequent population decline may be steeper. In the absence of exact data on the population trend, it is here tentatively placed in the band 10-19% over the past three generations and over the three generations from 2017 onward, noting that declines may accelerate in the future and that a direct quantification is necessary.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Ecuador extant native yes
Peru extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ecuador Bosque Protector Alto Nangaritza
Ecuador Cordillera del Cóndor
Peru Cordillera del Cóndor
Peru Urakusa

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 400 - 1050 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 Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Orange-throated Tanager Wetmorethraupis sterrhopteron. Downloaded from https://datazone.birdlife.org/species/factsheet/orange-throated-tanager-wetmorethraupis-sterrhopteron on 23/12/2024.
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 23/12/2024.