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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 Delta del Paraná

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: 362447
♂ ♀
  Adult

Delta del Paraná
Buenos Aires
Argentina
11/09/2019
Daniel Osvaldo Fernández
Foto
Photography ID: 361070
  Adult

Delta del Paraná
Buenos Aires
Argentina
03/17/2019
Sebastián Otero
Foto
Photography ID: 212999
  Adult

Delta del Paraná
Buenos Aires
Argentina
02/16/2016
Vicente Piccirillo
Foto
Photography ID: 114707
  Adult

Delta del Paraná
Buenos Aires
Argentina
09/13/2015
Eduardo Soriano
Foto
Photography ID: 105626
  Adult

Delta del Paraná
Buenos Aires
Argentina
05/24/2015
Carlos Villa



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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
177509704/06/2023ArgentinaBuenos AiresDelta del ParanáEsteban Argerich
163580404/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná2Sebastián Otero
163573003/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del Paraná1Sebastián Otero
163479203/09/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
161516316/07/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
159482728/05/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáDaniel Osvaldo Fernández
159436728/05/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
156524419/03/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáFabián Jaruf
156481119/03/2022ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
151579204/12/2021ArgentinaBuenos AiresCamping Cielo, Delta del ParanáMauricio Secchi
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 14/09/2026.