Data Zone
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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Near Threatened | A4c |
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2006 | Least Concern | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | not a migrant | Forest dependency | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 883,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | inferred | 2000-2029 |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 27% | - | - | - |
| Generation length | 9.6 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as locally not uncommon (Konig et al. 1999).
Trend justification: The population is declining rapidly due to forest loss within its range (per Tracewski et al. 2016).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Argentina | extant | native | yes | |||
| Bolivia | extant | native | yes | |||
| Paraguay | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Paraguay | Estancia Gran Siete |
| Paraguay | Fortín Toledo |
| Paraguay | Lagunas Saladas - Riacho Yacaré |
| Paraguay | Parque Nacional Defensores del Chaco |
| Paraguay | Parque Nacional Médanos del Chaco |
| Paraguay | Parque Nacional Teniente Enciso |
| Paraguay | Parque Nacional Tinfunqué - Estero Patiño |
| Paraguay | Pirizal |
| Paraguay | Pozo Hondo |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Dry | major | resident |
| Shrubland | Subtropical/Tropical Dry | suitable | resident |
| Wetlands (inland) | Shrub Dominated Wetlands | suitable | resident |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Livestock farming & ranching - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Intentional use: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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Recommended citation
BirdLife International (2025) Species factsheet: Chaco Owl Strix chacoensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/chaco-owl-strix-chacoensis on 25/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 25/01/2025.