Data Zone
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: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| 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 |
Land-mass type - continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 223,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 10000-19999 | poor | suspected | 2020 |
| Population trend | Decreasing | poor | suspected | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | 1-9 | - | - | - |
| Decline (10 years/3 generation past and future) | 1-9 | - | - | - |
| Number of subpopulations | 3-10 | - | - | - |
| Percentage 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 | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Argentina | N | Extant | Yes | |||
| Bolivia | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Bolivia | Reserva Nacional de Flora y Fauna Tariquía |
| Bolivia | Southern slopes of Tunari National Park (Vertiente Sur del Parque Nacional Tunari IBA) |
| Bolivia | Bosque de Polylepis de Mina Elba |
| Argentina | Parque Nacional Los Cardones |
| Argentina | Quebrada del Toro |
| Argentina | Cuesta del Obispo |
| Argentina | Fincas Santiago y San Andrés |
| Argentina | Santa Victoria, Cañani y Cayotal |
| Argentina | Alto Calilegua |
| Argentina | Caspala y Santa Ana |
| Argentina | San Lucas |
| Argentina | Cerro Negro de San Antonio |
| Argentina | Valle Colorado y Valle Grande |
| 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 | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Agriculture & aquaculture | Wood & pulp plantations - Small-holder plantations | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Asthenes heterura. Downloaded from
http://www.birdlife.org on 26/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 26/03/2023.
