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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 Parque Nacional Los Alerces

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: 524300
  Immature

Parque Nacional Los Alerces
Chubut
Argentina
01/30/2023
Diego Alfonso Rosa
Foto
Photography ID: 250742
  Adult

Parque Nacional Los Alerces
Chubut
Argentina
01/29/2018
Elsa Longo
Foto
Photography ID: 248827
  Adult

Parque Nacional Los Alerces
Chubut
Argentina
01/29/2018
Guillermo Marcaida



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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
172284330/01/2023ArgentinaChubutAcceso desde Trevelin, Parque Nacional Los AlercesDiego Alfonso Rosa
138192314/03/2021ArgentinaChubutParque Nacional Los AlercesMarcelo Funes
70651329/01/2018ArgentinaChubutParque Nacional Los AlercesElsa Longo
70189629/01/2018ArgentinaChubutParque Nacional Los AlercesGuillermo Marcaida
40810212/02/2016ArgentinaChubutAlrededores de Villa Futalaufquen, Parque Nacional Los AlercesFernando Alberto Segura
41082210/02/2016ArgentinaChubutAlrededores de Villa Futalaufquen, Parque Nacional Los Alerces1Fernando Alberto Segura
10620913/01/2014ArgentinaChubutParque Nacional Los AlercesSergio Giovanelli
28377318/11/2012ArgentinaChubutParque Nacional Los AlercesWalter Liriel Gómez Umpierrez
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 18/03/2026.