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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 Laguna Los Juncos

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: 215879
  Adult

Laguna Los Juncos
Río Negro
Argentina
08/26/2017
Eduardo Cusano
Foto
Photography ID: 122831
  Juvenile

Laguna Los Juncos
Río Negro
Argentina
10/25/2015
Mariano Costa
Foto
Photography ID: 116041
  Adult

Laguna Los Juncos
Río Negro
Argentina
09/20/2015
Roberto Battaglia
Foto
Photography ID: 65820
  Adult

Laguna Los Juncos
Río Negro
Argentina
10/09/2014
Patricio M. Silfeni
Foto
Photography ID: 13200
♂ ♀
 
Laguna Los Juncos
Río Negro
Argentina
01/08/2010
Diego Oscar



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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
198029925/02/2024ArgentinaRío NegroLaguna Los Juncos2Mariano Jalil
60716326/08/2017ArgentinaRío NegroLaguna Los JuncosEduardo Cusano
105962926/11/2015ArgentinaRío NegroLaguna Los Juncos2Julian Quillen Vidoz
35543125/10/2015ArgentinaRío NegroLaguna Los JuncosMariano Costa
33707301/10/2015ArgentinaRío NegroLaguna Los Juncos1Mariano Costa
33440220/09/2015ArgentinaRío NegroA 30 km de Bariloche, Laguna Los JuncosRoberto Battaglia
18928109/10/2014ArgentinaRío NegroLaguna Los JuncosPatricio M. Silfeni
3259008/01/2010ArgentinaRío NegroLaguna Los JuncosDiego Oscar
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.