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Machetornis rixosa

Cattle Tyrant


Machetornis rixosa

(Vieillot, LJP, 1819)
Picabuey
Suiriri-cavaleiro

Family: Tyrannidae
Order: Passeriformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

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Synonyms: Machetornis rixosus, Tyrannus rixosus.

Subspecies:





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Records from Río Negro

Conservation status according to BirdLife International: Least Concern


Description


A medium-sized, slender flycatcher with bright yellow underparts and soft brownish tones on the upperparts. The head shows a subtle gray wash, sometimes with a faint pale patch that is not easily visible at a distance. It often adopts an upright stance, perching on exposed structures. The bill is short, dark, and sturdy, suited for seizing active prey, while the rounded wings and moderately long tail give it a balanced, streamlined profile. Overall, it displays the clean, contrasting look typical of open-country tyrant flycatchers.

Geographical distribution: Widespread in South America, ranging from the southern Amazon and north-central regions down to central-eastern Argentina, and also present in Uruguay, Paraguay, and parts of Bolivia. It occurs continuously throughout tropical and subtropical zones, extending into temperate areas where open environments remain available.

Habitat: Occupies diverse open habitats, including natural grasslands, savannas, rural landscapes, roadsides, wetland edges, and even urbanized zones. Frequently associates with livestock, vehicles, or isolated structures that provide elevated perches essential for its foraging technique. It avoids dense forests but may use forest edges and degraded clearings.

Diet: Primarily insectivorous, feeding on medium to large insects captured in short, agile sallies from perches. It often pursues prey flushed by livestock, taking advantage of animals’ movement to detect insects. Occasionally consumes other arthropods or small vertebrates, reflecting a flexible feeding strategy according to local conditions.

Behavior: An active and alert species, frequently shifting between perches. Its most distinctive behavior is following livestock, which helps it locate disturbed insects. It flies with steady, direct wingbeats alternating with brief glides. Pairs or small groups are common, usually keeping watch from posts, fences, or rooftops.

Breeding: Builds a domed nest of fine plant fibers, roots, and assorted materials, placed in trees, human structures, or sometimes inside abandoned nests of other species. The typical clutch consists of two to three eggs, incubated by both adults. Young are fed regularly with prey captured during short flights around the nesting territory.

Conservation status: Classified globally as Least Concern, with stable populations and a broad distribution. Its ability to adapt to modified landscapes and coexist with rural activity has supported its persistence across much of its range.


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





Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 701430
  Adult

Cinco Saltos
Río Negro
Argentina
08/16/2026
Edgar Romeo
Foto
Photography ID: 628849
  Adult

Cipolletti
Río Negro
Argentina
03/29/2025
Tiziano Luka Pesci Rubilar
Foto
Photography ID: 566159
  Adult

General Roca
Río Negro
Argentina
01/21/2024
Julián Tocce
Foto
Photography ID: 535463
 
Las Grutas
Río Negro
Argentina
04/26/2023
Adrian Braidotti
Foto
Photography ID: 524591
  Adult

Viedma
Río Negro
Argentina
01/21/2023
Diego Alfonso Rosa
Foto
Photography ID: 490117
  Adult

General Roca
Río Negro
Argentina
01/18/2022
Julián Tocce
Foto
Photography ID: 244435
  Adult

Viedma
Río Negro
Argentina
01/24/2018
Federico Andrés De Maio
Foto
Photography ID: 237379
  Adult

General Roca
Río Negro
Argentina
01/05/2018
Alicia Miller
Foto
Photography ID: 236621
  Adult

General Roca
Río Negro
Argentina
01/02/2018
Julián Tocce
Foto
Photography ID: 226685
  Adult

Villa Regina
Río Negro
Argentina
11/06/2017
Edgardo J Fernandez
Foto
Photography ID: 189926
  Adult

Chimpay
Río Negro
Argentina
02/12/2017
Julián Tocce



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Species reports



 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
251586416/08/2026ArgentinaRío NegroLago Pellegrini, Cinco SaltosEdgar Romeo
245252825/03/2026ArgentinaRío NegroRuta 151 - cercanías a Catriel, Ruta del desierto1Hugo Caverzasi
226813729/03/2025ArgentinaRío NegroIsla Jordan, CipollettiTiziano Luka Pesci Rubilar
202294515/04/2024ArgentinaRío NegroGeneral Pacheco 390, Cipolletti3Jorgelina Lopez
208171523/02/2024ArgentinaRío Negro793 9 de Julio, General Roca1Kenneth Roberts
208171622/02/2024ArgentinaRío NegroGeneral Roca, General Roca5Kenneth Roberts
207136822/02/2024ArgentinaRío NegroGeneral Roca, General Roca5Ralph Roberts
208171217/02/2024ArgentinaRío NegroLa Tobiana, El Cuy1Kenneth Roberts
207136517/02/2024ArgentinaRío NegroLa Tobiana, El Cuy1Ralph Roberts
208171415/02/2024ArgentinaRío Negro472 Isidro Lobo, General Roca1Kenneth Roberts
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Cattle Tyrant (Machetornis rixosa) – Species account. Accessed from www.ecoregistros.org on 23/09/2026.