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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 Cañuelas

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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Last published photographs

Foto
Photography ID: 645859
  Adult

Cañuelas
Buenos Aires
Argentina
07/31/2025
Anku No Muñoz
Foto
Photography ID: 191749
  Adult

Cañuelas
Buenos Aires
Argentina
02/26/2017
Hernán Tolosa



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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
232957431/07/2025ArgentinaBuenos AiresLaguna la Celina, CañuelasAnku No Muñoz
128021116/08/2020ArgentinaBuenos AiresCamino Panelo, CañuelasHernán Tolosa
128019016/08/2020ArgentinaBuenos AiresCamino Panelo, CañuelasJorgelina Lopez
69299104/02/2018ArgentinaBuenos AiresReserva Natural Guardia del Juncal, CañuelasHernán Tolosa
54638026/02/2017ArgentinaBuenos AiresCamino entre ruta 3 y camino Panelo, CañuelasHernán Tolosa
42922301/05/2016ArgentinaBuenos AiresReserva Natural Guardia del Juncal, CañuelasHernán Tolosa
22087804/01/2015ArgentinaBuenos AiresJuncal en Camino del Potro, CañuelasPablo Brudnick
19566305/11/2014ArgentinaBuenos AiresClub de Campo La Martona, CañuelasPablo Brudnick
16799417/08/2014ArgentinaBuenos AiresCañuelasGonzalo Diaz
15047930/05/2014ArgentinaBuenos AiresAlejandro Petión camino de tierra, CañuelasPablo Brudnick
Page 1

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Citation recommended:

EcoRegistros. 2026. Cattle Tyrant (Machetornis rixosa) - Species sheet. Acceded from https://www.ecoregistros.org on 15/03/2026.