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

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

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

	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	-

	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	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Ecuador	extant	native	yes
Peru	extant	native	yes

Country/Territory	IBA Name
Ecuador	Bosque Protector Alto Nangaritza
Ecuador	Cordillera del Cóndor
Peru	Cordillera del Cóndor
Peru	Urakusa

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	400 - 1050 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		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

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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 23/11/2024.
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.