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Molothrus bonariensis

Shiny Cowbird


Molothrus bonariensis

(Gmelin, JF, 1789)
Tordo Renegrido
Chupim

Family: Icteridae
Order: Passeriformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

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Records from Argentina
Records from Jujuy
Records from San Salvador de Jujuy

Conservation status according to BirdLife International: Least Concern


Description


It is a medium-sized bird with a robust build and upright posture, showing clear sexual dimorphism. The male displays glossy black plumage with bluish or purplish iridescence, while the female is much duller, with brownish to grayish tones and fine streaking. The bill is short, strong, and conical, suited to a varied diet, and the dark eyes give it an alert expression.

Geographic distribution: It is widely distributed throughout South America, with natural and human-facilitated expansion into Central America and parts of the Caribbean. It is one of the most widespread species within its genus.

Habitat: It primarily inhabits open and semi-open environments, such as grasslands, farmland, rural areas, city outskirts, and urban parks. Its high tolerance for human-altered landscapes has greatly contributed to its geographic expansion.

Feeding: This species is omnivorous, feeding mainly on seeds, grains, and small invertebrates such as insects and larvae. It often forages on the ground, alone or in groups, frequently taking advantage of resources associated with livestock and agriculture.

Behavior: It is a gregarious and opportunistic species, commonly seen in flocks, especially outside the breeding season. It shows confident and adaptable behavior, often frequenting areas with intense human activity. During reproduction, females exhibit particularly stealthy behavior.

Nesting: It has a distinctive reproductive strategy known as brood parasitism, as it does not build its own nest. Females lay their eggs in the nests of other bird species, which then incubate the eggs and raise the chicks. The young often grow rapidly and may outcompete or displace the host’s offspring.

Conservation status: It is classified as Least Concern, due to its wide distribution, large population size, and strong adaptability. No significant global threats are currently identified.


Author of this compilation: EcoRegistros – 22/12/2025





Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 244642
♂
  Adult

San Salvador de Jujuy
Jujuy
Argentina
02/01/2018
Luis Fernandez Campos
Foto
Photography ID: 169971
♀
  Adult

San Salvador de Jujuy
Jujuy
Argentina
10/05/2016
Luis Fernandez Campos
Foto
Photography ID: 132592
♂
  Immature

San Salvador de Jujuy
Jujuy
Argentina
01/01/2016
Luis Fernandez Campos
Foto
Photography ID: 118104
♀
  Adult

San Salvador de Jujuy
Jujuy
Argentina
10/02/2015
Luis Fernandez Campos
Foto
Photography ID: 104471
♀
  Adult

San Salvador de Jujuy
Jujuy
Argentina
07/03/2015
Luis Fernandez Campos



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
131037214/11/2020ArgentinaJujuyHumedales Dique Los Molinos - Ladera Ne, San Salvador de Jujuy2Luis Fernandez Campos
69051102/02/2018ArgentinaJujuyFinca Cuyaya, San Salvador de Jujuy9Luis Fernandez Campos
69001201/02/2018ArgentinaJujuyNorte de Barrio Los Perales, San Salvador de JujuyLuis Fernandez Campos
68824429/01/2018ArgentinaJujuyCamino a Juan Galan, San Salvador de Jujuy11Luis Fernandez Campos
67163909/01/2018ArgentinaJujuyNorte de Barrio Los Perales, San Salvador de Jujuy9Luis Fernandez Campos
66771105/01/2018ArgentinaJujuyFinca Cuyaya, San Salvador de Jujuy14Luis Fernandez Campos
66225219/12/2017ArgentinaJujuyHumedales Dique Los Molinos - Ladera Ne, San Salvador de Jujuy4Luis Fernandez Campos
66216513/12/2017ArgentinaJujuyHumedales Dique Los Molinos - Ladera Ne, San Salvador de Jujuy5Luis Fernandez Campos
64843028/10/2017ArgentinaJujuyHumedales Dique Los Molinos - Ladera Ne, San Salvador de Jujuy6Luis Fernandez Campos
48628705/10/2016ArgentinaJujuyChijra, San Salvador de JujuyLuis Fernandez Campos
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) – Species account. Accessed from www.ecoregistros.org on 16/10/2026.