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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, Traslasierra

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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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
231352203/07/2025ArgentinaCórdobaMi Casa, Nono, Traslasierra5Juan Bautista Cerminato Granadé
231224501/07/2025ArgentinaCórdobaMi Casa, Nono, Traslasierra1Juan Bautista Cerminato Granadé
211927720/07/2024ArgentinaCórdobaArroyo Los Sanjuaninos, Nono, Traslasierra8Bc_pajareritos Aguilas Escudadas
211914820/07/2024ArgentinaCórdobaArroyo Los Sanjuaninos, Nono, Traslasierra8Juan Bautista Cerminato Granadé
211392815/07/2024ArgentinaCórdobaMonte de Casa, Nono, Traslasierra15Pedri Sarla
211068215/07/2024ArgentinaCórdobaMonte de Casa, Nono, Traslasierra15Bc_pajareritos Aguilas Escudadas
211063715/07/2024ArgentinaCórdobaMonte de Casa, Nono, Traslasierra15Juan Bautista Cerminato Granadé
210913911/07/2024ArgentinaCórdobaArroyo Los Sanjuaninos, Nono, Traslasierra4Juan Bautista Cerminato Granadé
166233523/07/2022ArgentinaCórdobaRio Los Sauces, confluncia con el Rio Nono chico, Nono, Traslasierra6Jorge Fernando Di Laudo
150788415/11/2021ArgentinaCórdobaRio Los Sauces, confluncia con el Rio Nono chico, Nono, Traslasierra13Jorge Fernando Di Laudo
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Citation recommended:

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