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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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Records from Vicente López

Conservation status according to BirdLife International: Least Concern

Synonyms: Machetornis rixosus, Tyrannus rixosus.

Subspecies:


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




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Latest feeding records
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Last published photographs

Foto
Photography ID: 589628
  Adult

Vicente López
Buenos Aires
Argentina
06/29/2024
Virginia Bonifacio
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: 496386
  Adult

Vicente López
Buenos Aires
Argentina
06/13/2022
Gabriel Carbajales
Foto
Photography ID: 145432
  Adult

Vicente López
Buenos Aires
Argentina
03/30/2016
Roberto Battaglia
Foto
Photography ID: 123561
  Adult

Vicente López
Buenos Aires
Argentina
10/12/2015
Virginia Bonifacio
Foto
Photography ID: 111171
  Adult

Vicente López
Buenos Aires
Argentina
08/22/2015
J. Simón Tagtachian



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
236903024/09/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López1Gabriel Carbajales
235163427/08/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López2Gabriel Carbajales
232088808/07/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López2Gabriel Carbajales
230067204/06/2025ArgentinaBuenos AiresArroyo Güemes, Vicente López2Gabriel Carbajales
230034022/05/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López3Gabriel Carbajales
230016414/05/2025ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López8Gabriel Carbajales
230006609/05/2025ArgentinaBuenos AiresArroyo Güemes, Vicente López1Gabriel Carbajales
229998301/05/2025ArgentinaBuenos AiresArroyo Güemes, Vicente López1Gabriel Carbajales
229966121/04/2025ArgentinaBuenos AiresArroyo Güemes, Vicente López5Gabriel Carbajales
217676318/10/2024ArgentinaBuenos AiresÁrea Natural Yrigoyen (Yrigoyen y el Río), Vicente López2Gabriel Carbajales
Page 1

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Citation recommended:

EcoRegistros. 2026. Cattle Tyrant (Machetornis rixosa) - Species sheet. Acceded from https://www.ecoregistros.org on 13/03/2026.