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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

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Foto
Photography ID: 581882
  Adult

Vicente López
Buenos Aires
Argentina
04/19/2024
Alec Earnshaw
Foto
Photography ID: 581159
  Immature

Vicente López
Buenos Aires
Argentina
04/19/2024
Alec Earnshaw
Foto
Photography ID: 327683
  Adult

Parque Nacional Iberá
Corrientes
Argentina
03/16/2019
Alec Earnshaw
Foto
Photography ID: 74420
  Adult

Parque Provincial Chancaní
Córdoba
Argentina
03/02/2014
Alec Earnshaw
Foto
Photography ID: 68270
  Adult

Ceibas
Entre Ríos
Argentina
10/26/2014
Alec Earnshaw
Foto
Photography ID: 60185
  Adult

Palmasola
Jujuy
Argentina
08/19/2014
Alec Earnshaw



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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
244712314/03/2026ArgentinaBuenos AiresReserva Pampas de Anguyá Tutú, General LavalleAlec Earnshaw
241546412/01/2026ArgentinaCórdobaParque Las Heras, CapitalAlec Earnshaw
228720010/05/2025ArgentinaEntre RíosCeibasAlec Earnshaw
228313103/05/2025ArgentinaEntre RíosCeibasAlec Earnshaw
226504719/02/2025ArgentinaLa RiojaReserva Natural Urbana TakuAlec Earnshaw
226500618/02/2025ArgentinaLa RiojaPlaza 25 de Mayo, La RiojaAlec Earnshaw
221164519/12/2024ArgentinaBuenos AiresPuerto, Camino a san clemente del tuyu1Alec Earnshaw
217035305/10/2024ArgentinaEntre RíosCeibas, CeibasAlec Earnshaw
215901428/09/2024ArgentinaBuenos AiresCamino de El Cazal, Belén de EscobarAlec Earnshaw
215882028/09/2024ArgentinaBuenos AiresIngeniero Maschwitz, Reserva Natural Ingeniero MaschwitzAlec Earnshaw
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 26/09/2026.