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Geranoaetus polyosoma

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AVES ACCIPITRIFORMES ACCIPITRIDAE

Scientific Name: Geranoaetus polyosoma
Species Authority: (Quoy & Gaimard, 1824)
Common Name(s):
English Variable Hawk, Variable Hawk
Synonym(s):
Buteo poecilochrous Gurney, 1879
Buteo polyosoma (Quoy & Gaimard, 1824)
Taxonomic Notes: 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).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Symes, A.
Justification:
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Geographic Range [top]

Countries:
Native:
Argentina; Bolivia, Plurinational States of; Chile; Colombia; Ecuador; Falkland Islands (Malvinas); Paraguay; Peru; Uruguay
Vagrant:
Brazil
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The global population size has not been quantified, but this species is described as 'fairly common' (Stotz et al. (1996).
Population Trend: Increasing

Habitat and Ecology [top]

Systems: Terrestrial

Citation: BirdLife International 2012. Geranoaetus polyosoma. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 03 September 2014.
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