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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 Rosario

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: 643586
  Juvenile

Rosario
Santa Fe
Argentina
07/19/2025
Joaquín Perosino
Foto
Photography ID: 628773
  Adult

Rosario
Santa Fe
Argentina
03/30/2025
Peter Vidana
Foto
Photography ID: 624781
  Adult

Rosario
Santa Fe
Argentina
01/09/2025
Peter Vidana
Foto
Photography ID: 537088
  Adult

Rosario
Santa Fe
Argentina
06/04/2023
Miguel Angel Fernández
Foto
Photography ID: 535488
  Juvenile

Rosario
Santa Fe
Argentina
05/16/2023
Andrés Cecconi
Foto
Photography ID: 534081
  Immature

Rosario
Santa Fe
Argentina
05/04/2023
Tramannoni Ariel
Foto
Photography ID: 453013
 
Rosario
Santa Fe
Argentina
07/08/2021
Adrian Braidotti
Foto
Photography ID: 401338
 
Rosario
Santa Fe
Argentina
06/19/2020
Lotfi Si Saber
Foto
Photography ID: 267831
  Immature

Rosario
Santa Fe
Argentina
06/02/2018
Andrés Cecconi



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Last Vocalizations published




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Last Filmings published


Video ID: 6669
  Adult

Rosario
Santa Fe
Argentina
05/18/2025
Peter Vidana



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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
232215419/07/2025ArgentinaSanta FeBosque de los Constituyentes, Rosario1Joaquín Perosino
231384105/07/202509:23ArgentinaSanta FeGreca 355b, Rosario1Joaquín Perosino
228940618/05/2025ArgentinaSanta FeParque España, RosarioPeter Vidana
226792930/03/2025ArgentinaSanta FeBvd Oroño, RosarioPeter Vidana
225809409/01/2025ArgentinaSanta FeParque España, RosarioPeter Vidana
211809121/07/2023ArgentinaSanta FeRosario1Gisela Ballent
179580521/07/2023ArgentinaSanta FeRosario1Santiago Juan Torres
177551804/06/2023ArgentinaSanta FeBosque de los Constituyentes, RosarioMiguel Angel Fernández
176668816/05/2023ArgentinaSanta FeBarrio Belgrano, RosarioAndrés Cecconi
176083504/05/2023ArgentinaSanta FeBosque de los Constituyentes, RosarioTramannoni Ariel
Page 1

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Citation recommended:

EcoRegistros. 2026. Harris´s Hawk (Parabuteo unicinctus) - Species sheet. Acceded from https://www.ecoregistros.org on 10/03/2026.