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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: 135620
  Adult

Ensenada
Buenos Aires
Argentina
01/22/2016
Diego Varales
Foto
Photography ID: 101765
  Adult

Ensenada
Buenos Aires
Argentina
06/08/2015
Diego Varales
Foto
Photography ID: 63155
  Adult

Ensenada
Buenos Aires
Argentina
09/28/2014
Diego Varales
Foto
Photography ID: 43502
  Adult

Villa Elisa
Buenos Aires
Argentina
01/16/2014
Diego Varales
Foto
Photography ID: 16723
  Adult

Ensenada
Buenos Aires
Argentina
03/30/2012
Diego Varales



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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
243088403/02/2026UruguayColoniaColonia del Sacramento, ColoniaDiego Varales
241556404/01/2026ArgentinaBuenos AiresEl Dique, Ensenada1Diego Varales
214708707/09/2024ArgentinaBuenos AiresLaguna de los Patos, EnsenadaDiego Varales
202025329/03/2024UruguayCanelonesLas ToscasDiego Varales
194333110/01/2024ArgentinaBuenos AiresClub Regatas, Ensenada1Diego Varales
193666701/01/2024ArgentinaBuenos AiresEnsenada1Diego Varales
193240018/12/2023UruguayMaldonadoPiriápolisDiego Varales
193116617/12/2023UruguayMaldonadoPiriápolisDiego Varales
180569606/08/2023ArgentinaBuenos AiresGeneral Guido1Diego Varales
171611529/12/2022UruguayMaldonadoLa CapueraDiego Varales
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 22/09/2026.