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Variable Hawk

Geranoaetus polyosoma
(Quoy, JRC; Gaimard, JP, 1824)
Aguilucho Común
Gavião-de-costas-vermelhas

Family: Accipitridae
Order: Accipitriformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

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Records from Córdoba

Conservation status according to BirdLife International: Least Concern

Other common names: Ñanco, Aguilucho Variable.

Synonyms: Buteo polyosoma, Falco polyosoma.

Subspecies:


Description: It is a large, long-winged raptor with a slender profile and remarkable plumage variability. Individuals range from mostly ash-gray to rufous or chestnut tones, with lighter or darker underparts depending on morph. In flight, it is recognized by its slightly raised wings forming a shallow “V”, relatively short tail, and pale patches at the base of the primaries. Juveniles tend to be browner and more streaked.

Geographic distribution: It is widely distributed across South America, from southern Colombia and Venezuela to southernmost Chile and Argentina. It is especially common along the Andes, but also inhabits Patagonian steppes, intermontane valleys, and open lowlands.

Habitat: It occupies open and semi-open habitats, including grasslands, shrublands, agricultural areas, and mountainous regions. It tolerates a broad altitudinal range, from sea level to over 4,000 m, efficiently using thermal currents for soaring.

Diet: It is an opportunistic predator, feeding mainly on small mammals (particularly rodents), medium-sized birds, reptiles, and large insects. It also scavenges when opportunities arise, which increases its dietary flexibility.

Behavior: Usually seen alone or in pairs, though it may gather where food is abundant. It spends long periods soaring with a powerful yet economical flight, and maintains large territories during the breeding season.

Nesting: It builds large stick nests, typically on rocky cliffs, escarpments, or occasionally tall trees and human-made structures. Clutches usually consist of one to two eggs, with shared parental care and an extended fledging period.

Conservation status: It is classified as Least Concern globally due to its wide range and generally stable populations, although local threats include persecution, electrocution, and habitat alteration.


Author of this compilation: EcoRegistros – 15/12/2025




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Last published photographs

Foto
Photography ID: 681241
 
Copina
Córdoba
Argentina
03/22/2026
Facundo Carretero
Foto
Photography ID: 678170
  Adult

Camino Altas Cumbres
Córdoba
Argentina
03/06/2026
Roberto Fermín Derna
Foto
Photography ID: 659405
  Adult

Departamento Ischilín
Córdoba
Argentina
07/08/2025
Walter Bustamante
Foto
Photography ID: 636471
♂ ♀
  Adult

Parque Nacional Quebrada del Condorito
Córdoba
Argentina
04/05/2025
Pablo Eguia
Foto
Photography ID: 636469
♂ ♀
  Adult

Parque Nacional Quebrada del Condorito
Córdoba
Argentina
04/05/2025
Pablo Eguia
Foto
Photography ID: 620560
  Adult

La Cumbrecita
Córdoba
Argentina
01/30/2025
Jorge Carlos Trincavelli
Foto
Photography ID: 619380
  Juvenile

San Alberto
Córdoba
Argentina
01/11/2025
Pablo Eguia



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
245590822/03/2026ArgentinaCórdobaCamino de Los Puentes Colgantes, CopinaFacundo Carretero
244803906/03/2026ArgentinaCórdobaCercanía Parque Nacional Quebrada del Condorito, Camino Altas CumbresRoberto Fermín Derna
244319606/03/2026ArgentinaCórdobapuentes colgantes de Copina, Copina1Hugo Caverzasi
244318606/03/2026ArgentinaCórdobaLagunas Rp34, Altas cumbres1Hugo Caverzasi
244316206/03/2026ArgentinaCórdobaCamino a Paso de Piedra, Altas cumbres1Hugo Caverzasi
243960813/02/2026ArgentinaCórdobaParque Nacional Quebrada Del Condorito1Pablo Eguia
245501311/02/2026ArgentinaCórdobaParque Nacional Quebrada del CondoritoEduardo Nadal
241857117/01/2026ArgentinaCórdobaPuesto Ur-mendia, Pampa de Achala2Andres Espindola
241698811/01/2026ArgentinaCórdobaCamino de La Cumbre a AscochingaDaniel Oscar Serra
232448721/07/202517:25ArgentinaCórdobaParque Nacional Quebrada del Condorito1María Paz Mattalia
Page 1

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Citation recommended:

EcoRegistros. 2026. Variable Hawk (Geranoaetus polyosoma) - Species sheet. Acceded from https://www.ecoregistros.org on 11/04/2026.