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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 de Merlo

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: 489294
  Adult

Villa de Merlo
San Luis
Argentina
03/27/2022
Eduardo Cusano
Foto
Photography ID: 489292
  Adult

Villa de Merlo
San Luis
Argentina
03/27/2022
Eduardo Cusano
Foto
Photography ID: 488084
  Adult

Villa de Merlo
San Luis
Argentina
03/27/2022
Sergio Cusano
Foto
Photography ID: 487971
  Immature

Villa de Merlo
San Luis
Argentina
03/23/2022
Sergio Cusano
Foto
Photography ID: 455458
♂ ♀
  Adult

Villa de Merlo
San Luis
Argentina
07/10/2021
Andrés Cecconi
Foto
Photography ID: 434670
  Adult

Villa de Merlo
San Luis
Argentina
02/16/2021
Dolores Fernandez
Foto
Photography ID: 416770
  Adult

Villa de Merlo
San Luis
Argentina
05/17/2019
Fernando Naifleisch
Foto
Photography ID: 385280
 
Villa de Merlo
San Luis
Argentina
02/12/2020
Leonardo Caballero
Foto
Photography ID: 377203
  Juvenile

Villa de Merlo
San Luis
Argentina
01/05/2020
Silvio Montani
Foto
Photography ID: 348604
  Adult

Villa de Merlo
San Luis
Argentina
08/31/2019
Yanina Golocovsky
Foto
Photography ID: 343868
  Adult

Villa de Merlo
San Luis
Argentina
07/28/2019
Eduardo Muñiz
Foto
Photography ID: 343758
  Adult

Villa de Merlo
San Luis
Argentina
07/18/2019
Pablo Eguia



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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
222969620/12/2024ArgentinaSan LuisCamino al Filo, Villa de Merlo1Elsa Longo
204840017/06/2024ArgentinaSan LuisFilo sierra Comechingones, Villa de MerloDolores Fernandez
197682306/02/2024ArgentinaSan LuisReserva Florofaunistica de Rincon del Este, Villa de Merlo2Rodolfo Domnanovich
156815627/03/2022ArgentinaSan LuisVilla de MerloEduardo Cusano
156556727/03/2022ArgentinaSan LuisVilla de MerloSergio Cusano
156535623/03/2022ArgentinaSan LuisCamino Damiana Vega, Villa de MerloSergio Cusano
143918510/07/2021ArgentinaSan LuisFilo serrano, Villa de MerloAndrés Cecconi
137220216/02/2021ArgentinaSan LuisMerlo, Villa de MerloDolores Fernandez
119134912/02/2020ArgentinaSan LuisVilla de MerloLeonardo Caballero
117732205/01/2020ArgentinaSan LuisMerlo y alrededores, Villa de MerloSilvio Montani
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 16/03/2026.