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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 Perdices

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: 612065
  Adult

Perdices
Entre Ríos
Argentina
11/09/2024
Jorge Blackhall
Foto
Photography ID: 564453
  Adult

Perdices
Entre Ríos
Argentina
01/04/2024
Santiago Alemán
Foto
Photography ID: 521853
  Adult

Perdices
Entre Ríos
Argentina
01/22/2023
Gustavo Puente
Foto
Photography ID: 478025
  Adult

Perdices
Entre Ríos
Argentina
01/04/2022
Gustavo Puente
Foto
Photography ID: 169163
  Adult

Perdices
Entre Ríos
Argentina
09/24/2016
Luis Gaudini
Foto
Photography ID: 165232
  Adult

Perdices
Entre Ríos
Argentina
09/09/2013
Rodolfo Capdevielle
Foto
Photography ID: 127862
  Adult

Perdices
Entre Ríos
Argentina
12/06/2015
Hernán Tolosa
Foto
Photography ID: 72325
  Juvenile

Perdices
Entre Ríos
Argentina
12/13/2014
Eduardo Cusano



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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
245237526/03/2026ArgentinaEntre RíosPerdices20Diego Oscar
221318420/12/2024ArgentinaEntre RíosPerdices2Gabriel Carbajales
220403809/11/2024ArgentinaEntre RíosZona Perdices, PerdicesJorge Blackhall
197862219/01/2024ArgentinaEntre RíosPerdices2Diego Oscar
194444204/01/2024ArgentinaEntre RíosZona Perdices, PerdicesSantiago Alemán
193945804/01/2024ArgentinaEntre RíosZona Perdices, Perdices8Gabriel Carbajales
173772511/03/2023ArgentinaEntre RíosPerdicesDiego Oscar
171549126/01/2023ArgentinaEntre RíosEl estribo, Perdices6Hugo Caverzasi
170916722/01/2023ArgentinaEntre RíosPerdicesGustavo Puente
167697219/11/2022ArgentinaEntre RíosPerdices3Diego Oscar
Page 1

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Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 15/04/2026.