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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 Termas de Río Hondo

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: 34989
  Adult

Termas de Río Hondo
Santiago del Estero
Argentina
01/19/2014
Norberto Gomez
Foto
Photography ID: 34654
  Adult

Termas de Río Hondo
Santiago del Estero
Argentina
01/16/2014
Norberto Gomez
Foto
Photography ID: 13663
  Immature

Termas de Río Hondo
Santiago del Estero
Argentina
04/21/2012
Norberto Gomez



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
219558517/11/2024ArgentinaSantiago del EsteroTermas de Río HondoFabrizio García
235266425/08/2024ArgentinaSantiago del EsteroReserva Tara Inti, Termas de Río Hondo5Mauro Desch
75592130/03/2018ArgentinaSantiago del EsteroAvda. Costanera, Termas de Río HondoWalter Bustamante
71369212/03/2018ArgentinaSantiago del EsteroOrillas del dique y montes cercanos., Termas de Río Hondo20Dario Juan Wendeler
71354811/03/2018ArgentinaSantiago del EsteroReserva Tara Inti y alrededores., Termas de Río Hondo20Dario Juan Wendeler
57919328/05/2017ArgentinaSantiago del EsteroReserva Tara Inti y costa del dique., Termas de Río Hondo9Dario Juan Wendeler
46789415/08/2016ArgentinaSantiago del EsteroTermas de Río HondoCarlos Schmidt
37862213/11/2015ArgentinaSantiago del EsteroTermas de Río HondoRamiro Ramirez
37852212/11/2015ArgentinaSantiago del EsteroReserva Tara Inti, Termas de Río HondoRamiro Ramirez
28484205/05/2015ArgentinaSantiago del EsteroReserva Tara Inti, Termas de Río HondoChristian Altamirano
Page 1

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Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 10/04/2026.