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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 Bialet Masse

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: 475052
  Juvenile

Bialet Masse
Córdoba
Argentina
12/13/2021
Adrian Braidotti
Foto
Photography ID: 5980
  Juvenile

Bialet Masse
Córdoba
Argentina
01/14/2011
Adrian Braidotti



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
242629218/01/2026ArgentinaCórdobaBarrio Mirador del Lago, Bialet MasseAdrian Braidotti
238735616/11/2025ArgentinaCórdobaBarrio Mirador del Lago, Bialet MasseAdrian Braidotti
232553320/07/2025ArgentinaCórdobaMirador del Lago, Bialet MasseAdrian Braidotti
229362326/05/2025ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet MasseAdrian Braidotti
214218921/08/2024ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet MasseAdrian Braidotti
194410504/01/2024ArgentinaCórdobaMirador del Lago, Bialet MasseAdrian Braidotti
169974604/01/2023ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet Masse4Adrian Braidotti
164034716/09/2022ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet Masse6Adrian Braidotti
159395010/06/2022ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet Masse1Adrian Braidotti
151537413/12/2021ArgentinaCórdobaBialet Masse. Mirador del Lago, Bialet MasseAdrian Braidotti
Page 1

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Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 11/04/2026.