Data Zone
Taxonomic note
Geranoaetus polyosoma (del Hoyo and Collar 2014) was previously placed in the genus Buteo. Buteo poecilochrous (Sibley and Monroe 1990, 1993; Stotz et al. 1996) was also lumped with B. polyosoma following SACC (2006).
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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. 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 |
|---|---|---|
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | Low |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 13,800,000 | medium |
| Extent of Occurrence non-breeding (km2) | 14,400,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 0 | |||
| Population trend | Increasing | poor | observed | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 9.7 | - | - | - |
Population justification: The global population size has not been quantified, but this species is described as 'fairly common' (Stotz et al. (1996).
Trend justification: The population is suspected to be decreasing locally in Ecuador, Chile and Argentina (Ferguson-Lees and Christie 2001).
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Argentina | N | Extant | Yes | |||
| Bolivia | N | Extant | Yes | |||
| Brazil | V | Extant | ||||
| Chile | N | Extant | Yes | |||
| Colombia | N | Extant | Yes | |||
| Ecuador | N | Extant | Yes | |||
| Falkland Islands (Malvinas) | N | Extant | Yes | |||
| Paraguay | N | Extant | Yes | |||
| Peru | N | Extant | Yes | |||
| Uruguay | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Arable Land | suitable | breeding |
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Forest | Subtropical/Tropical Dry | suitable | non-breeding |
| Forest | Subtropical/Tropical Dry | suitable | breeding |
| Forest | Temperate | suitable | non-breeding |
| Forest | Temperate | suitable | breeding |
| Grassland | Subtropical/Tropical High Altitude | suitable | non-breeding |
| Grassland | Subtropical/Tropical High Altitude | suitable | breeding |
| Grassland | Temperate | suitable | breeding |
| Grassland | Temperate | suitable | non-breeding |
| Rocky areas (eg. inland cliffs, mountain peaks) | suitable | non-breeding | |
| Rocky areas (eg. inland cliffs, mountain peaks) | suitable | breeding | |
| Shrubland | Subtropical/Tropical Dry | suitable | non-breeding |
| Shrubland | Subtropical/Tropical Dry | suitable | breeding |
| Shrubland | Subtropical/Tropical High Altitude | suitable | breeding |
| Shrubland | Subtropical/Tropical High Altitude | suitable | non-breeding |
| Shrubland | Subtropical/Tropical Moist | suitable | breeding |
| Shrubland | Subtropical/Tropical Moist | suitable | non-breeding |
| Altitude | 500 - 5000 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2022) Species factsheet: Geranoaetus polyosoma. Downloaded from
http://www.birdlife.org on 28/05/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 28/05/2022.
