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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 La Bianca - Camino al Río 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





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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
234878527/08/2025ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia1Patricia Beatriz Benitez
213479318/08/2024ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia2Patricia Beatriz Benitez
212653431/07/2024ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia1Patricia Beatriz Benitez
212693126/07/2024ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia3Patricia Beatriz Benitez
212290725/07/2024ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia2Patricia Beatriz Benitez
163565604/09/2022ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia3Patricia Beatriz Benitez
137440801/03/2021ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia2Patricia Beatriz Benitez
131165715/11/2020ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia3Patricia Beatriz Benitez
127460520/07/2020ArgentinaEntre RíosLa Bianca - Camino al Río Uruguay, Concordia5Patricia Beatriz Benitez
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 23/09/2026.