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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 Río Negro

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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Latest feeding records
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Last published photographs

Foto
Photography ID: 628341
  Adult

Cerro Guerra
Río Negro
Argentina
03/14/2025
Nicolas Chimento
Foto
Photography ID: 588080
  Adult

Faro Belen
Río Negro
Argentina
06/19/2024
Ricardo Juliano
Foto
Photography ID: 585203
  Adult

General Roca
Río Negro
Argentina
10/04/2021
Tiziano Luka Pesci Rubilar
Foto
Photography ID: 566245
  Juvenile

Pilcaniyeu
Río Negro
Argentina
01/21/2024
Mariano Jalil
Foto
Photography ID: 565318
 
Ñirihuau
Río Negro
Argentina
01/14/2024
Mariano Jalil
Foto
Photography ID: 521809
  Adult

Faro Belen
Río Negro
Argentina
01/20/2023
Ricardo Juliano



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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
241507411/01/2026ArgentinaRío NegroFaro Belen, Adolfo AlsinaRicardo Juliano
241501011/01/202615:30ArgentinaRío NegroLos JuncosMariano Costa
241142706/01/202619:48ArgentinaRío NegroCamino sin nombrarMariano Costa
241099805/01/202619:35ArgentinaRío NegroCamino sin nombrar1Mariano Costa
240286420/12/2025ArgentinaRío NegroRp1 / R40s Entrada a Ñorquinco, Ñorquinco1Mariano Costa
239933214/12/202517:20ArgentinaRío NegroCamino sin nombrar1Mariano Costa
239926614/12/202517:20ArgentinaRío NegroCamino sin nombrar1Jorge La Grotteria
238556214/11/202516:30ArgentinaRío NegroCamino sin nombrarMariano Costa
238299007/11/202513:33ArgentinaRío NegroRuta Provincial 80 S/N, San Carlos de BarilocheMariano Costa
238298607/11/202513:24ArgentinaRío NegroRuta Provincial 80 S/N, San Carlos de BarilocheMariano Costa
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 11/04/2026.