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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 Laguna de los Padres

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: 701462
  Adult

Mar del Plata
Buenos Aires
Argentina
12/06/2025
José Luis Ianiro
Foto
Photography ID: 374730
  Adult

Mar del Plata
Buenos Aires
Argentina
01/01/2020
Gustavo Ramos
Foto
Photography ID: 271614
  Juvenile

Mar del Plata
Buenos Aires
Argentina
06/22/2018
Hector Ortiz
Foto
Photography ID: 42741
  Adult

Mar del Plata
Buenos Aires
Argentina
02/28/2014
Roberto Vañecek



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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
251593006/12/2025ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataJosé Luis Ianiro
232313119/07/2025ArgentinaBuenos AiresLaguna de los Padres, Mar del Plata1Victor Hugo Michelini
178493210/02/2023ArgentinaBuenos AiresLaguna de los Padres, Mar del Plata2José Luis Ianiro
166580211/09/2022ArgentinaBuenos AiresLaguna de los Padres, Mar del Plata5Victor Hugo Michelini
150831821/11/2021ArgentinaBuenos AiresLaguna de los Padres, Mar del Plata3José Luis Ianiro
127533609/07/2020ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataMónica Suarez
127419209/07/2020ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataVictor Hugo Michelini
116983701/01/2020ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataGustavo Ramos
77105822/06/2018ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataHector Ortiz
12286828/02/2014ArgentinaBuenos AiresLaguna de los Padres, Mar del PlataRoberto Vañecek
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.