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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 Uruguay

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: 700890
  Adult

Colonia Miguelete
Colonia
Uruguay
08/21/2026
Javier Laprebendere
Foto
Photography ID: 682231
  Adult

Playa Seré
Colonia
Uruguay
04/09/2026
Luis Mier
Foto
Photography ID: 575469
  Adult

Atlantida
Canelones
Uruguay
03/12/2024
Julián Tocce
Foto
Photography ID: 541090
  Adult

Atlantida
Canelones
Uruguay
07/10/2023
Julián Tocce
Foto
Photography ID: 526815
  Adult

Montevideo
Montevideo
Uruguay
01/16/2023
Jorge Carlos Trincavelli
Foto
Photography ID: 456881
  Adult

Bella Unión
Artigas
Uruguay
08/11/2021
Javier Laprebendere
Foto
Photography ID: 455613
  Adult

Capitán Artigas
Canelones
Uruguay
06/23/2021
Javier Laprebendere
Foto
Photography ID: 454850
  Adult

Young
Río Negro
Uruguay
07/21/2021
Javier Laprebendere
Foto
Photography ID: 426090
  Adult

Camino Planta de silos
Colonia
Uruguay
05/16/2020
Luis Mier
Foto
Photography ID: 417615
  Adult

Humedal Arroyo Maldonado
Maldonado
Uruguay
11/05/2020
Alejandra Pons
Foto
Photography ID: 403777
  Adult

Playa Punta piedras
Colonia
Uruguay
05/24/2020
Luis Mier
Foto
Photography ID: 333437
  Adult

Laguna Negra
Rocha
Uruguay
05/19/2019
Luis Mier



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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
253212220/09/2026UruguaySaltoArerunguá-área general1Pablo Bruni
251444921/08/2026UruguayColoniaColonia MigueleteJavier Laprebendere
251602714/08/2026UruguaySaltoLaguna de las Garzas, Salto Grande2Pablo Bruni
245896611/04/2026UruguayTacuaremboEstación Laureles1Gabriel Carbajales
245889211/04/2026UruguayTacuaremboEstablecimiento Bichadero, Tacuarembó1Gabriel Carbajales
245785309/04/2026UruguayColoniaDesembocadura arroyo las vacas, Playa SeréLuis Mier
245162017/03/2026UruguaySaltoLaguna de las Garzas, Salto Grande2Pablo Bruni
243232209/02/2026UruguaySaltoLaguna de las Garzas, Salto Grande3Pablo Bruni
242810605/02/2026UruguayRío NegroFray bentosAndres Espindola
243088403/02/2026UruguayColoniaColonia del Sacramento, ColoniaDiego 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 24/09/2026.