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Harris´s Hawk

Parabuteo unicinctus
(Temminck, CJ, 1824)
Gavilán Mixto
Gavião-asa-de-telha

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

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Records from Avellaneda

Conservation status according to BirdLife International: Least Concern

Synonyms: Falco unicinctus.

Subspecies:


Description: A medium-to-large raptor with an elegant outline, easily recognized by the contrast between its dark brown body, rich rufous wing coverts, and paler legs and tail base. A prominent white tail band is visible both perched and in flight. Its robust head, hooked bluish-gray bill and long yellowish tarsi lend it a powerful and agile appearance, well suited for maneuvering through shrubs and open spaces.

Geographical distribution: Ranges widely across the Americas, from the southwestern United States and Mexico through Central America and extensive areas of South America, including Brazil, Bolivia, Paraguay, Uruguay, Chile, and Argentina. It is most common in arid and semiarid regions with low vegetation, where small prey and elevated perches are readily available.

Habitat: Occupies open or semi-open environments such as scrublands, savannas, dry forests, arid zones, grasslands, and rural landscapes with scattered trees. It tolerates modified habitats when they provide open spaces for hunting and natural or artificial structures for perching.

Diet: Predominantly consumes small mammals, small birds, reptiles and occasionally large insects. A versatile hunter, it combines low flights, short pursuits and ambushes from elevated perches. One of its most distinctive traits is the ability to engage in cooperative hunting, where coordinated group strategies greatly increase capture success.

Behavior: Notably social for a raptor, forming family groups that may include several individuals assisting in territory defense, hunting and raising the young. Its flight is broad and controlled, alternating glides with strong wingbeats. Frequent use of fence posts, branches and other elevated points reflects its constant vigilance behavior.

Breeding: Builds nests in medium to tall trees, on columnar cacti or occasionally on human-made structures. Nests consist of sturdy branches forming a platform reused over multiple seasons. Typical clutches contain two to four eggs, mostly incubated by the female. Juveniles remain with the group for an extended period, learning cooperative hunting before dispersing.

Conservation status: Listed as Least Concern, with stable populations throughout most of its range. Its cooperative behavior and adaptability to open habitats favor its persistence, though localized threats include habitat degradation and persecution.


Author of this compilation: EcoRegistros – 08/12/2025




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Last published photographs

Foto
Photography ID: 677203
  Adult

Avellaneda
Buenos Aires
Argentina
01/02/2026
Diego Trillo
Foto
Photography ID: 646936
  Juvenile

Avellaneda
Buenos Aires
Argentina
08/03/2025
Diego Trillo
Foto
Photography ID: 642233
  Adult

Avellaneda
Buenos Aires
Argentina
06/28/2025
Diego Trillo
Foto
Photography ID: 642229
  Juvenile

Avellaneda
Buenos Aires
Argentina
06/28/2025
Diego Trillo
Foto
Photography ID: 642227
  Adult

Avellaneda
Buenos Aires
Argentina
06/28/2025
Diego Trillo
Foto
Photography ID: 637128
  Adult

Avellaneda
Buenos Aires
Argentina
05/25/2025
Pablo Richter
Foto
Photography ID: 635401
  Adult

Avellaneda
Buenos Aires
Argentina
05/11/2025
Diego Trillo
Foto
Photography ID: 627690
 
Avellaneda
Buenos Aires
Argentina
03/02/2025
Diego Trillo
Foto
Photography ID: 613440
  Juvenile

Avellaneda
Buenos Aires
Argentina
12/02/2024
Diego Trillo
Foto
Photography ID: 613437
  Adult

Avellaneda
Buenos Aires
Argentina
12/02/2024
Diego Trillo
Foto
Photography ID: 610714
  Immature

Avellaneda
Buenos Aires
Argentina
11/18/2024
Diego Trillo
Foto
Photography ID: 610712
  Adult

Avellaneda
Buenos Aires
Argentina
11/18/2024
Diego Trillo



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
244530202/01/2026ArgentinaBuenos AiresEco Área Avellaneda, AvellanedaDiego Trillo
244605807/12/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda4Pablo Richter
242658409/11/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda2Pablo Richter
242529602/11/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda3Pablo Richter
242455026/10/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda3Pablo Richter
242145916/10/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda3Pablo Richter
237099204/10/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda1Pablo Richter
240792803/10/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda3Pablo Richter
240549714/09/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda1Pablo Richter
240497507/09/2025ArgentinaBuenos AiresEco Área Avellaneda, Avellaneda4Pablo Richter
Page 1

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Citation recommended:

EcoRegistros. 2026. Harris´s Hawk (Parabuteo unicinctus) - Species sheet. Acceded from https://www.ecoregistros.org on 15/03/2026.