• 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
-	-	-

Red List history

Year	Category	Criteria
2021	Least Concern
2016	Near Threatened	C1+2a(i)
2012	Near Threatened	C1+2a(i)
2008	Near Threatened	C1; C2a(i)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1996	Vulnerable
1994	Vulnerable
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	223,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-19999 mature individuals	poor	suspected	2020
Population trend	decreasing	poor	suspected	2016-2025
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	2.69 years	-	-	-
Number of subpopulations	3-10	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The species is described as 'fairly common' (Stotz et al. 1996). The population has not been quantified, but based on observational records it is suspected to number 10,000-19,999 mature individuals, though this requires confirmation.
Even though the subpopulation structure has not been assessed, it is here assumed that the species forms at least three moderately large subpopulations (per eBird 2021).

Trend justification: Population trends have not been directly estimated. Even though the species tolerates habitat disturbance, the population is suspected to be in slow decline locally due to habitat loss and degradation (Remsen 2020). The overall rate of decline is unlikely to exceed 10% over ten years.

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

Country/Territory	IBA Name
Argentina	Alto Calilegua
Argentina	Caspala y Santa Ana
Argentina	Cerro Negro de San Antonio
Argentina	Cuesta del Obispo
Argentina	Fincas Santiago y San Andrés
Argentina	Parque Nacional Los Cardones
Argentina	Quebrada del Toro
Argentina	San Lucas
Argentina	Santa Victoria, Cañani y Cayotal
Argentina	Valle Colorado y Valle Grande
Bolivia	Reserva Nacional de Flora y Fauna Tariquía
Bolivia	Southern slopes of Tunari National Park (Vertiente Sur del Parque Nacional Tunari IBA)

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	resident
Artificial/Terrestrial	Pastureland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Grassland	Subtropical/Tropical High Altitude	suitable	resident
Shrubland	Subtropical/Tropical High Altitude	major	resident
Altitude	3000 - 4200 m	Occasional altitudinal limits	(min) 2500 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Small-holder plantations	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Maquis Canastero Asthenes heterura. Downloaded from https://datazone.birdlife.org/species/factsheet/maquis-canastero-asthenes-heterura 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.