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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 Nono

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: 43442
  Adult

Nono
Córdoba
Argentina
02/16/2014
Jorge Omar Lanza



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
243074408/02/2026ArgentinaCórdobaJose Manuel Amaya, Nono2Hugo Caverzasi
232830929/07/2025ArgentinaCórdobaCola del Dique, Bajo el Molino, Nono30Juan Bautista Cerminato Granadé
232082915/07/2025ArgentinaCórdobaCola del Dique, Bajo el Molino, Nono6Juan Bautista Cerminato Granadé
232075413/07/2025ArgentinaCórdobaArroyo los Sanjuaninos, Nono3Juan Bautista Cerminato Granadé
220242517/11/2024ArgentinaCórdobaVado Rio Los Sauces, Nono28Pablo Eguia
210267605/07/2024ArgentinaCórdobaNono18Juan Bautista Cerminato Granadé
171622130/01/2023ArgentinaCórdobaNono5Pablo Bruni
143987120/07/2021ArgentinaCórdobaCola del dique La Viña, Nono21Jorge Fernando Di Laudo
12419016/02/2014ArgentinaCórdobaNonoJorge Omar Lanza
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.