• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note
Psophia viridis, P. dextralis and P. obscura (del Hoyo and Collar 2014) were previously lumped as P. viridis 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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	A4cd	A2cd+4cd

Red List history

Year	Category	Criteria
2023	Endangered	A4cd
2016	Endangered	A4cd
2014	Endangered	A4cd
2012	Not Recognised
2008	Not Recognised
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)	1,110,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	inferred	2017-2039
Rate of change over the past 10 years/3 generations (longer of the two periods)	35-40%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	50-59%	-	-	-
Generation length	7.34 years	-	-	-
Number of subpopulations	2	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not been quantified, but this species is described as uncommon to rare (Stotz et al. 1996, del Hoyo et al. 2022).

Trend justification: The species is reportedly declining, as a consequence of habitat loss and fragmentation in combination with hunting for food, and is now restricted to remote areas far away from human settlements and disturbance (del Hoyo et al. 2022).
Over the past three generations (22 years), 21% of tree cover has been lost within the range; since 2017 this has been increasing to a rate equivalent to 29% over three generations (Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). This species is described as extremely sensitive to forest fragmentation, edge-effects and anthropogenic disturbance (del Hoyo et al. 2022). Precautionarily it is therefore suspected that overall habitat loss exceeds the rate of tree cover loss by half, suggesting an overall rate of habitat loss of 31-32% over the past three generations and accelerating to 44% over three generations from 2017 onward.
The impact of hunting on the population size has not been quantified, but the species is described as susceptible (A. Lees in litt. 2020, del Hoyo et al. 2022). In the absence of a quantification of the impact it is tentatively suspected that hunting contributes an additional c.5-10% to the rate of population decline, accounting for the fact that the increase in logging activities in turn increases the accessibility to remote areas occupied by the species (per A. Lees in litt. 2020). Tentatively, past declines are therefore here placed in the band 35-40% over three generations, with the rate accelerating to 50-59% from 2017 onward.

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

Country/Territory	IBA Name
Brazil	Cristalino / Serra do Cachimbo
Brazil	Serra dos Carajás

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude		Occasional altitudinal limits

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%)		Rapid Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species mortality

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Olive-winged Trumpeter Psophia dextralis. Downloaded from https://datazone.birdlife.org/species/factsheet/olive-winged-trumpeter-psophia-dextralis on 22/12/2024.
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 22/12/2024.