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

Taxonomic note
Thripophaga amacurensis (del Hoyo and Collar 2016) is recognized as a species following work by Hilty et al. (2013).

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	B1ab(ii,iii)+2ab(ii,iii)

Red List history

Year	Category	Criteria
2022	Vulnerable	B1ab(ii,iii)+2ab(ii,iii)
2016	Endangered	B1ab(iii,v)
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)	1,343 km2
Area of Occupancy (breeding/resident)	1,292 km2
Number of locations	6-10	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	2018-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-5%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-5%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-5%	-	-	-
Generation length	2.8 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The population size of this species has not been quantified. The population is however suspected to be small given the very restricted range.
Due to its very small range, it is assumed that the species forms one subpopulation.

Trend justification: The species is threatened by the loss of its habitat; however its remote range is currently not under immediate threats and forest loss has been negligible over the past ten years (<1%; Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Nevertheless, small parts in the south-west of the range have been deforested for agricultural use (Lentino and Sharpe 2015; Global Forest Watch 2021), and as such the species is suspected to be undergoing a slow decline, the rate of which is unlikely to exceed 5% over ten years.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Swamp	major	resident
Altitude	0 - 100 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Causing/Could cause fluctuations		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Energy production & mining	Oil & gas drilling	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Delta Amacuro Softtail Thripophaga amacurensis. Downloaded from https://datazone.birdlife.org/species/factsheet/delta-amacuro-softtail-thripophaga-amacurensis 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.