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Black-chested Buzzard-Eagle

Geranoaetus melanoleucus
(Vieillot, LJP, 1819)
Águila Mora
Águia-chilena

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

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Records from Villa Mercedes

Conservation status according to BirdLife International: Least Concern

Synonyms: Spizaetus melanoleucus.

Subspecies:


Description: It is a large raptor with a robust build and powerful silhouette, featuring broad wings and a relatively short tail. Adult plumage shows a strong contrast between the dark upperparts and pale underparts, with whitish breast and belly finely barred. The head is dark gray, the bill strong and hooked, and the legs long and muscular, well adapted for capturing sizeable prey.

Geographic distribution: It is widely distributed across South America, ranging from southern Colombia and Peru to southernmost Argentina and Chile. In Argentina, it occurs throughout much of the country, from Andean regions to Patagonian plains, demonstrating remarkable ecological flexibility.

Habitat: It occupies a wide variety of open environments, including steppes, grasslands, mountainous areas, plateaus, and semi-arid regions. The species favors landscapes with broad visibility, allowing efficient use of thermal currents and long-distance prey detection.

Feeding: Its diet is carnivorous and diverse, consisting mainly of small to medium-sized mammals, such as rodents and hares, as well as birds, reptiles, and occasionally carrion. It is an efficient predator, capable of hunting both from low flight and elevated perches.

Behavior: The species is generally solitary or found in pairs, performing wide soaring flights that rely heavily on thermals. It becomes territorial during the breeding season and is often seen perched on rocks, poles, or natural elevations, scanning the surroundings.

Nesting: Breeding occurs mainly in spring. It builds large nests, often reused for several years, placed on rocky ledges, cliffs, or tall trees. The clutch usually includes one to two eggs, incubated by both adults, followed by an extended period of parental care.

Conservation status: It is classified as a species of Least Concern, with relatively stable populations throughout most of its range. However, local threats include human persecution, prey depletion, and habitat alteration.


Author of this compilation: EcoRegistros – 16/12/2025





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Last published photographs

Foto
Photography ID: 544032
  Adult

Villa Mercedes
San Luis
Argentina
07/28/2012
Fernando Rasmussen
Foto
Photography ID: 476285
  Immature

Villa Mercedes
San Luis
Argentina
07/16/2021
Walter Bustamante
Foto
Photography ID: 451323
  Adult

Villa Mercedes
San Luis
Argentina
05/24/2021
Jorge Omar Lanza
Foto
Photography ID: 193857
  Adult

Villa Mercedes
San Luis
Argentina
02/25/2017
Guillermo Marcaida
Foto
Photography ID: 153765
  Juvenile

Villa Mercedes
San Luis
Argentina
05/29/2016
Diego Villalba
Foto
Photography ID: 153764
  Adult

Villa Mercedes
San Luis
Argentina
05/29/2016
Diego Villalba
Foto
Photography ID: 8822
  Immature

Villa Mercedes
San Luis
Argentina
09/21/2011
Nicolas Olejnik
Foto
Photography ID: 8821
  Adult

Villa Mercedes
San Luis
Argentina
09/21/2011
Nicolas Olejnik



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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
151571916/07/2021ArgentinaSan LuisRn8, Villa MercedesWalter Bustamante
141977724/05/2021ArgentinaSan LuisRuta Nro 8 - Ingreso a la ciudad de Villa Mdes., Villa MercedesJorge Omar Lanza
55243725/02/2017ArgentinaSan LuisRn 8 ( Km 714), Villa MercedesElsa Longo
55168425/02/2017ArgentinaSan LuisRn ( Km 714), Villa MercedesGuillermo Marcaida
44407329/05/2016ArgentinaSan LuisVilla MercedesDiego Villalba
40829701/02/2016ArgentinaSan LuisVilla MercedesNatalia Mufato
180762028/07/2012ArgentinaSan LuisSobre Ruta 7, Villa MercedesFernando Rasmussen
1892521/09/2011ArgentinaSan LuisVilla MercedesNicolas Olejnik
Page 1

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Citation recommended:

EcoRegistros. 2026. Black-chested Buzzard-Eagle (Geranoaetus melanoleucus) - Species sheet. Acceded from https://www.ecoregistros.org on 19/03/2026.