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




Species icon
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




Loading map...




Last published photographs

Foto
Photography ID: 593526
  Adult

Parque Costero del Sur
Buenos Aires
Argentina
05/26/2024
Santiago Alemán
Foto
Photography ID: 564453
  Adult

Perdices
Entre Ríos
Argentina
01/04/2024
Santiago Alemán
Foto
Photography ID: 84745
  Adult

San Javier
Córdoba
Argentina
01/30/2015
Santiago Alemán
Foto
Photography ID: 84744
  Adult

San Javier
Córdoba
Argentina
01/30/2015
Santiago Alemán
Foto
Photography ID: 83809
  Adult

San Javier
Córdoba
Argentina
01/30/2015
Santiago Alemán
Foto
Photography ID: 83808
 

San Javier
Córdoba
Argentina
01/30/2015
Santiago Alemán
Foto
Photography ID: 83770
  Adult

San Javier
Córdoba
Argentina
01/30/2015
Santiago Alemán
Foto
Photography ID: 66662
  Adult

Ceibas
Entre Ríos
Argentina
09/27/2014
Santiago Alemán
Foto
Photography ID: 62699
  Adult

Ordoqui
Buenos Aires
Argentina
09/13/2014
Santiago Alemán



 View all photographs of the species




 Add a photography of this species





Last Vocalizations published




 Add an audio of this species





Last Filmings published




 Add a film of this species





 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
212349626/05/2024ArgentinaBuenos AiresCamino rural, Parque Costero del SurSantiago Alemán
194444204/01/2024ArgentinaEntre RíosZona Perdices, PerdicesSantiago Alemán
190066107/10/2023ArgentinaSanta FeEstancia La Lucila, La Lucila - Departamento San CristobalSantiago Alemán
179276527/05/2023ArgentinaEntre RíosCamino a 4 Hermanas, Ceibas3Santiago Alemán
179270427/05/2023ArgentinaEntre RíosVilla San Miguel Herrera4Santiago Alemán
179278826/05/2023ArgentinaEntre RíosRuta Nacional 142Santiago Alemán
179263526/05/2023ArgentinaEntre RíosEstancia Herrera, Villa San Miguel Herrera800Santiago Alemán
175634622/04/2023ArgentinaEntre RíosCeibas66Santiago Alemán
165661208/10/2022ArgentinaSanta FeArroyo San Antonio, La Lucila - Departamento San CristobalSantiago Alemán
163067520/08/2022ArgentinaBuenos AiresLaguna de los Patos, Ensenada7Santiago Alemán
Page 1

 Add a record of this species

Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 19/04/2026.