Don't want to see ads? Sign up...




Molothrus bonariensis

Shiny Cowbird


Molothrus bonariensis

(Gmelin, JF, 1789)
Tordo Renegrido
Chupim

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

 Request change




Filters



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


Loading map...




Species photographs

Last published photographs

Foto
Photography ID: 571575
♂
  Adult

Rosario de la Frontera
Salta
Argentina
12/18/2023
Max Uranga
Foto
Photography ID: 571280
♂
  Adult

Islas Departamento Victoria
Entre Ríos
Argentina
11/24/2023
Max Uranga
Foto
Photography ID: 309400
♂
  Adult

Partido de General Madariaga
Buenos Aires
Argentina
12/26/2018
Max Uranga
Foto
Photography ID: 307714
♂
  Adult

Manzano Historico
Mendoza
Argentina
12/08/2018
Max Uranga
Foto
Photography ID: 296451
♂
  Adult

Maciá
Entre Ríos
Argentina
10/15/2018
Max Uranga
Foto
Photography ID: 218584
♂
  Adult

Cafayate
Salta
Argentina
07/14/2017
Max Uranga
Foto
Photography ID: 217935
♂
  Adult

Funes
Santa Fe
Argentina
01/05/2017
Max Uranga
Foto
Photography ID: 146111
♂
  Adult

Marcos Juárez
Córdoba
Argentina
01/19/2016
Max Uranga



 View all photographs of the species




 Add a photography of this species






Species vocalizations

Last vocalizations published



 Add an audio of this species





Species videos

Last filmings published




 Add a film of this species





Species reports



 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
197634918/12/2023ArgentinaSaltaFinca el Ukumari, Rosario de la FronteraMax Uranga
197596124/11/2023ArgentinaEntre RíosIsla El Pimpollal, Islas Departamento VictoriaMax Uranga
86518226/12/2018ArgentinaBuenos AiresRuta 11, Km 400. Cerca de estación de servicios frente a la entrada a Cariló, Partido de General MadariagaMax Uranga
86120908/12/2018ArgentinaMendozaCamino que sube a la cordillera y cruza a chile, Manzano HistoricoMax Uranga
83330815/10/2018ArgentinaEntre RíosCampo Don Santiago, MaciáMax Uranga
61323914/07/2017ArgentinaSaltaCafayateMax Uranga
61200205/01/2017ArgentinaSanta FeKentucky Club de Campo, FunesMax Uranga
42331519/01/2016ArgentinaCórdobaEstancia Aguila Cautiva, Isla Verde, Marcos JuárezMax Uranga
22678008/12/2014ArgentinaChubutCamaronesMax Uranga
Page 1

 Add a record of this species

📖
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 01/10/2026.