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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 Perú

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: 664270
 
San salvador
Cuzco
Peru
09/22/2025
Julian Uriel Collado
Foto
Photography ID: 530459
  Adult

Carretera a Manu
Cuzco
Peru
10/27/2022
Alejandra Pons
Foto
Photography ID: 457460
  Adult

Huarochiri
Lima
Peru
06/13/2021
Brandon Ortiz Arenas
Foto
Photography ID: 390482
  Immature

Central Hidroeléctrica de Huanza
Lima
Peru
03/05/2020
Rutger Koperdraad
Foto
Photography ID: 355901
  Juvenile

Huarochiri
Lima
Peru
10/09/2019
Rutger Koperdraad
Foto
Photography ID: 351021
  Adult

Laguna junin
Junín
Peru
08/24/2019
Pablo Eguia
Foto
Photography ID: 335321
  Adult

Bosque de Zárate
Lima
Peru
06/01/2019
Rutger Koperdraad
Foto
Photography ID: 229844
  Juvenile

Puno
Puno
Peru
08/09/2017
Pablo Marcelo Meyer
Foto
Photography ID: 229843
  Juvenile

Puno
Puno
Peru
08/09/2017
Pablo Marcelo Meyer
Foto
Photography ID: 229841
  Juvenile

Puno
Puno
Peru
08/09/2017
Pablo Marcelo Meyer



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
240244922/09/2025PeruCuzcoUnnamed Road, Qosqo, Pe1Silvina Collado
240243722/09/2025PeruCuzcoSacred garden, San salvador1Silvina Collado
240164522/09/2025PeruCuzcoUnnamed Road, Qosqo, Pe1Julian Uriel Collado
240163322/09/2025PeruCuzcoSacred garden, San salvador1Julian Uriel Collado
231348513/05/2025PeruLambayequeArea de Conservacion Privada ChaparríFederico J. Villegas
174220927/10/2022PeruCuzcoCarretera a ManuAlejandra Pons
157475610/04/2022PeruArequipaYanque1Gabriel Carbajales
157472609/04/2022PeruArequipaMirador Cruz de Condor, Cañon de Colca1Gabriel Carbajales
157787106/04/2022PeruCuzcoHuanipacaMarcos Augusto Lartigau
157459105/04/2022PeruCuzcoAbra La Raya2Gabriel Carbajales
Page 1

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Citation recommended:

EcoRegistros. 2026. Variable Hawk (Geranoaetus polyosoma) - Species sheet. Acceded from https://www.ecoregistros.org on 29/03/2026.