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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 Argentina

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: 705300
  Adult

Puerto Iguazú
Misiones
Argentina
09/01/2026
Dolores Fernandez
Foto
Photography ID: 705102
  Adult

La Plata
Buenos Aires
Argentina
09/16/2026
Gabriel Gorrín Armas
Foto
Photography ID: 705074
  Adult

Pinto
Santiago del Estero
Argentina
09/13/2024
Diego Alfonso Rosa
Foto
Photography ID: 704997
  Adult

Dique de Los Sauces
La Rioja
Argentina
09/15/2026
Carlos De Biagi
Foto
Photography ID: 704637
  Adult

Gualeguaychú
Entre Ríos
Argentina
07/26/2026
Andrea Casaburi
Foto
Photography ID: 704228
  Adult

Departamento Capital
La Rioja
Argentina
09/09/2026
Carlos De Biagi
Foto
Photography ID: 702924
  Adult

General Pico
La Pampa
Argentina
09/03/2026
Hugo Alberto Valderrey
Foto
Photography ID: 702823
  Adult

Lujan de Cuyo
Mendoza
Argentina
09/03/2026
Damián Carnevale



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Species vocalizations

Last vocalizations published


Audio playerUserDateCountryProvincePlaceSexLife stageIt was observedDetails
Viviana Fuentes06/09/2026ArgentinaTucumánParque Guillermina - Av Mate De Luna 4100San Miguel de TucumánIndistinguishableAdultNoNo
Viviana Fuentes06/08/2026ArgentinaTucumánParque Guillermina - Av Mate De Luna 4100San Miguel de TucumánIndistinguishableN/ANoNo
Manuel Eduardo Serra04/10/2024ArgentinaCórdobaReserva Natural Los QuebrachitosCabana, UnquilloN/AAdultNoNo
Viviana Fuentes01/06/2026ArgentinaTucumánColalao Del Valle - Ruta 40Tafí del ValleIndistinguishableN/ANoNo
Pablo Bruni03/22/2025ArgentinaCorrientesCerca Ruta 22Concepción del Yaguareté CoráN/AN/AYesNo
Viviana Fuentes03/13/2024ArgentinaTucumánSan Miguel, capitalN/AN/ANoNo
Viviana Fuentes03/13/2024ArgentinaTucumánTucumánN/AN/ANoNo
Pablo Bruni04/16/2022ArgentinaEntre RíosReserva ChaviyúDepartamento FederaciónN/AN/ANoNo
Diego Oscar06/01/2021ArgentinaBuenos AiresDel VisoN/AN/AYesNo



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Last filmings published





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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
253190622/09/2026ArgentinaBuenos AiresLos Carpinchos, Lobería2Susana Gomez
253183522/09/202618:11ArgentinaEntre RíosLago Salto Grande, Concordia1Jorge La Grotteria
253179221/09/2026ArgentinaEntre RíosCamino a 4 Hermanas, Ceibas5Gabriel Carbajales
253015320/09/2026ArgentinaCórdobaCapilla del Monte - Los ParedonesEnzo Rossi
253141919/09/2026ArgentinaEntre RíosMédanos1Gabriel Carbajales
253138219/09/2026ArgentinaEntre RíosCeibas, Ceibas2Gabriel Carbajales
253121919/09/2026ArgentinaEntre RíosTerraplen, Ceibas1Gabriel Carbajales
252907919/09/202608:05ArgentinaSanta Fe1º de Mayo 2401, Santa Fe de la Vera Cruz1Gustavo Fernando Durán
252831517/09/202611:30ArgentinaBuenos AiresCasco urbano, Ensenada1Javier A. Origlia
253113016/09/2026ArgentinaBuenos AiresCosta de Hudson--Costanera, Berazategui3Gabriel Carbajales
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.