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Rufous-tailed Hawk Buteo ventralis

This species is thought to have a small global population and is considered Near Threatened. If further infomation indicates that its total population falls below 1,000 mature individuals, it would qualify for uplisting to Vulnerable.

Taxonomic source(s)
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: #

Distribution and population
Buteo ventralis is endemic to the lower Andes of Patagonia in southern Chile and Argentina, where it is rare, occurring at naturally low densities. No data is available regarding numbers or densities, and there is no firm evidence of a decline, but its habitat has suffered extensive degradation and some authorities consider that the total population is unlikely to exceed 1,000 individuals (Ferguson-Lees and Christie 2001). Further information is required regarding population size, trends and other potential or existing threats. Increased knowledge of identification features may generate more records of this species.

Population justification
The total population is placed in the band 250-999 mature individuals, equating to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.

Trend justification
The population is suspected to be stable despite the fact that the destruction of its habitat is ongoing.

It inhabits the ecotone between Nothofagus forest and steppe grassland from sea level to at least 1,200 m.

Its habitat has been negatively affected by logging and overgrazing since the introduction of sheep and cattle (S. Imberti in litt. 2003).

Conservation Actions Underway
None is known. Conservation Actions Proposed
Survey to obtain an accurate population estimate and monitor trends. Clarify threats. Protect areas of suitable habitat and safeguard against the effects of logging and overgrazing.

Bierregaard, R. O. 1994. Neotropical Accipitridae (Hawks and Eagles). In: del Hoyo, J.; Elliott, A.; Sargatal, J. (ed.), Handbook of the birds of the world, pp. 52-205. Lynx Edicions, Barcelona, Spain.

Chebez, J. C. 1994. Los que se van: especies argentinas en peligro. Albatros, Buenos Aires.

del Hoyo, J.; Elliott, A.; Sargatal, J. 1994. Handbook of the Birds of the World, vol. 2: New World Vultures to Guineafowl. Lynx Edicions, Barcelona, Spain.

Ferguson-Lees, J.; Christie, D. A. 2001. Raptors of the world. Christopher Helm, London.

Further web sources of information
Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Benstead, P., Capper, D., Mansur, E., Sharpe, C J & Symes, A.

Imberti, S.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2015) Species factsheet: Buteo ventralis. Downloaded from on 09/10/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from on 09/10/2015.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Rufous-tailed hawk (Buteo ventralis) 0

Key facts
Current IUCN Red List category Near Threatened
Family Accipitridae (Hawks, Eagles)
Species name author Gould, 1837
Population size 250-999 mature individuals
Population trend Stable
Distribution size (breeding/resident) 537,000 km2
Country endemic? No
Links to further information
- Additional Information on this species