Don't want to see ads? Sign up...





Species icon
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

 Request change
Filters

Records from Jujuy

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




Loading map...




Last published photographs

Foto
Photography ID: 663036
  Adult

Yavi
Jujuy
Argentina
11/13/2025
Federico J. Villegas
Foto
Photography ID: 656069
  Adult

Abra Pampa
Jujuy
Argentina
09/18/2025
Eduardo Cusano
Foto
Photography ID: 655136
  Adult

Cuesta de Lipán
Jujuy
Argentina
09/20/2025
Sergio Cusano
Foto
Photography ID: 645757
  Adult

Valle Colorado
Jujuy
Argentina
07/25/2025
Gustavo Marasco
Foto
Photography ID: 630672
  Adult

Santa Ana de Valle Grande
Jujuy
Argentina
04/10/2025
Diego Carus
Foto
Photography ID: 613429
  Adult

Humahuaca
Jujuy
Argentina
11/10/2024
Carlos Valpreda
Foto
Photography ID: 601644
  Juvenile

Abra de Zenta
Jujuy
Argentina
04/20/2024
Oscar Alfredo Eliseche
Foto
Photography ID: 595077
  Adult

Abra Pampa
Jujuy
Argentina
07/17/2024
Gustavo Daniel González
Foto
Photography ID: 589862
  Adult

Yavi
Jujuy
Argentina
06/22/2024
Pablo Alberto Re



 View all photographs of the species




 Add a photography of this species





Last Vocalizations published




 Add an audio of this species





Last Filmings published





 Ver todos los videos de la especie




 Add a film of this species





 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
239981913/11/2025ArgentinaJujuyYaviFederico J. Villegas
236560821/09/202512:35ArgentinaJujuyRuta Provincial 731Eduardo Cusano
237060020/09/2025ArgentinaJujuyCuesta de LipánSergio Cusano
236312820/09/202515:55ArgentinaJujuyRuta Nacional 52 39-41Eduardo Cusano
236311920/09/202510:22ArgentinaJujuyRuta Nacional 52 201Eduardo Cusano
237238218/09/2025ArgentinaJujuyLaguna del Huancar, Abra PampaEduardo Cusano
236463113/09/2025ArgentinaJujuyEntre Tumbaya y Volcán, Ruta 91Gabriel Carbajales
236451912/09/2025ArgentinaJujuyParque Provincial Potrero de Yala1Gabriel Carbajales
235973512/09/2025ArgentinaJujuyParque Provincial Potrero de Yala1Matias M. Chavez
235739102/09/2025ArgentinaJujuyIglesia de Yavi, Yavi2Hugo Caverzasi
Page 1

 Add a record of this species

Citation recommended:

EcoRegistros. 2026. Variable Hawk (Geranoaetus polyosoma) - Species sheet. Acceded from https://www.ecoregistros.org on 23/03/2026.