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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.

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Records from Reserva Natural Urbana Gral. San Martín

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





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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
137699707/03/2021ArgentinaCórdobaReserva Natural Urbana Gral. San Martín1Fabrizio García
131698925/11/2020ArgentinaCórdobaReserva Natural Urbana Gral. San MartínJorge Schlemmer
77163824/06/2018ArgentinaCórdobaReserva Natural Urbana Gral. San MartínJorge Schlemmer
67924620/01/2018ArgentinaCórdobaReserva Natural Urbana Gral. San Martín3Pablo Morales
66700001/01/2018ArgentinaCórdobaReserva Natural Urbana Gral. San Martín3Pablo Morales
61495516/09/2017ArgentinaCórdobaReserva Natural Urbana Gral. San MartínEmiliano Garcia Loyola
60957619/05/2017ArgentinaCórdobaReserva Natural Urbana Gral. San MartínEmiliano Garcia Loyola
33831503/10/2015ArgentinaCórdobaReserva Natural Urbana Gral. San Martín2Pablo Morales
32375518/07/2015ArgentinaCórdobaReserva Natural Urbana Gral. San MartínPablo Morales
24452719/02/2015ArgentinaCórdobaReserva Natural Urbana Gral. San MartínMartin Toledo
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 18/09/2026.