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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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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: 633470
  Adult

Candelaria
Misiones
Argentina
04/12/2025
Edgar Romeo
Foto
Photography ID: 594329
  Adult

Colón
Entre Ríos
Argentina
07/25/2024
Edgar Romeo
Foto
Photography ID: 585877
  Adult

Parque del Bicentenario
Salta
Argentina
04/25/2024
Edgar Romeo
Foto
Photography ID: 554281
  Adult

Parque Nacional Mburucuyá
Corrientes
Argentina
09/17/2023
Edgar Romeo
Foto
Photography ID: 531678
  Adult

Ancasti
Catamarca
Argentina
03/04/2023
Edgar Romeo
Foto
Photography ID: 502447
  Adult

Cercanía de Pirané
Formosa
Argentina
06/21/2022
Edgar Romeo
Foto
Photography ID: 502446
  Adult

Parque Nacional El Impenetrable
Chaco
Argentina
06/14/2022
Edgar Romeo
Foto
Photography ID: 468108
  Adult

Aristóbulo del Valle
Misiones
Argentina
09/19/2021
Edgar Romeo
Foto
Photography ID: 444131
  Adult

Arenas Verdes
Buenos Aires
Argentina
05/01/2021
Edgar Romeo
Foto
Photography ID: 373136
  Adult

San Manuel
Buenos Aires
Argentina
01/10/2020
Edgar Romeo
Foto
Photography ID: 280507
  Adult

Parque Nacional El Palmar
Entre Ríos
Argentina
03/14/2018
Edgar Romeo



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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
228490612/04/2025ArgentinaMisionesRuta papa Francisco, CandelariaEdgar Romeo
212680925/07/2024ArgentinaEntre RíosPN El Palmar--Sendero La Glorieta, ColónEdgar Romeo
203932525/04/2024ArgentinaSaltaParque del BicentenarioEdgar Romeo
190550417/09/2023ArgentinaCorrientesParque Nacional MburucuyáEdgar Romeo
174846604/03/2023ArgentinaCatamarcaRio Icaño, AncastiEdgar Romeo
161785121/06/2022ArgentinaFormosaCercanía de PiranéEdgar Romeo
161784914/06/2022ArgentinaChacoParque Nacional El ImpenetrableEdgar Romeo
148607919/09/2021ArgentinaMisionesSalto Chaves, Aristóbulo del ValleEdgar Romeo
140130101/05/2021ArgentinaBuenos AiresArenas verdes, Arenas VerdesEdgar Romeo
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 27/09/2026.