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Species icon
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 Pehuen-Có

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




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Last published photographs

Foto
Photography ID: 233343
  Adult

Pehuen-Có
Buenos Aires
Argentina
12/09/2017
Diego Hernán Pérez
Foto
Photography ID: 233183
  Adult

Pehuen-Có
Buenos Aires
Argentina
12/09/2017
Diego Hernán Pérez
Foto
Photography ID: 225208
  Adult

Pehuen-Có
Buenos Aires
Argentina
10/28/2017
Diego Hernán Pérez
Foto
Photography ID: 225207
  Adult

Pehuen-Có
Buenos Aires
Argentina
10/29/2017
Diego Hernán Pérez
Foto
Photography ID: 183942
  Adult

Pehuen-Có
Buenos Aires
Argentina
01/02/2017
Lucas Martín
Foto
Photography ID: 136636
  Adult

Pehuen-Có
Buenos Aires
Argentina
01/23/2016
Diego Hernán Pérez
Foto
Photography ID: 130272
  Juvenile

Pehuen-Có
Buenos Aires
Argentina
12/18/2015
Diego Hernán Pérez
Foto
Photography ID: 123938
  Adult

Pehuen-Có
Buenos Aires
Argentina
10/31/2015
Diego Hernán Pérez
Foto
Photography ID: 108082
  Adult

Pehuen-Có
Buenos Aires
Argentina
07/29/2015
Diego Hernán Pérez
Foto
Photography ID: 107166
  Adult

Pehuen-Có
Buenos Aires
Argentina
09/12/2012
Diego Hernán Pérez



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
65712909/12/2017ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
63408229/10/2017ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
63408328/10/2017ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
52342302/01/2017ArgentinaBuenos AiresPehuen-CóLucas Martín
39863823/01/2016ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
37746418/12/2015ArgentinaBuenos AiresArroyo zauce Grande, Pehuen-CóDiego Hernán Pérez
35811931/10/2015ArgentinaBuenos AiresCasco urbano, Pehuen-CóDiego Hernán Pérez
31114729/07/2015ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
12351528/01/2014ArgentinaBuenos AiresPehuen-CóJimena Varano
30804812/09/2012ArgentinaBuenos AiresPehuen-CóDiego Hernán Pérez
Page 1

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Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 07/04/2026.