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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 Dique de Los Sauces

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: 656959
  Adult

Dique de Los Sauces
La Rioja
Argentina
10/04/2025
Carlos De Biagi
Foto
Photography ID: 560350
  Adult

Dique de Los Sauces
La Rioja
Argentina
12/07/2023
Carlos De Biagi
Foto
Photography ID: 430116
  Adult

Dique de Los Sauces
La Rioja
Argentina
01/15/2021
Carlos De Biagi
Foto
Photography ID: 430114
  Adult

Dique de Los Sauces
La Rioja
Argentina
01/15/2021
Carlos De Biagi
Foto
Photography ID: 417760
♂ ♀
  Adult

Dique de Los Sauces
La Rioja
Argentina
11/03/2020
Carlos De Biagi
Foto
Photography ID: 374556
  Adult

Dique de Los Sauces
La Rioja
Argentina
01/13/2020
Carlos De Biagi
Foto
Photography ID: 374554
  Adult

Dique de Los Sauces
La Rioja
Argentina
01/13/2020
Carlos De Biagi
Foto
Photography ID: 310115
  Adult

Dique de Los Sauces
La Rioja
Argentina
01/11/2019
Carlos De Biagi
Foto
Photography ID: 247624
  Adult

Dique de Los Sauces
La Rioja
Argentina
02/13/2018
Carlos De Biagi
Foto
Photography ID: 171148
  Adult

Dique de Los Sauces
La Rioja
Argentina
10/08/2016
Carlos De Biagi
Foto
Photography ID: 171147
  Adult

Dique de Los Sauces
La Rioja
Argentina
10/08/2016
Carlos De Biagi



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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
243881622/02/2026ArgentinaLa RiojaDique de Los Sauces4Carlos De Biagi
237527204/10/2025ArgentinaLa RiojaDique de Los SaucesCarlos De Biagi
193680428/12/2023ArgentinaLa RiojaDique de Los Sauces4Carlos De Biagi
193027807/12/2023ArgentinaLa RiojaDique de Los SaucesCarlos De Biagi
135204915/01/2021ArgentinaLa RiojaBahia Los Sauces, Dique de Los SaucesCarlos De Biagi
130762203/11/2020ArgentinaLa RiojaEl Bosquecillo, Dique de Los SaucesCarlos De Biagi
116936513/01/2020ArgentinaLa RiojaDique de Los SaucesCarlos De Biagi
86705911/01/2019ArgentinaLa RiojaDique de Los SaucesCarlos De Biagi
85805709/12/2018ArgentinaLa RiojaDique de Los Sauces1Carlos De Biagi
69858113/02/2018ArgentinaLa RiojaDique de Los SaucesCarlos De Biagi
Page 1

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Citation recommended:

EcoRegistros. 2026. Shiny Cowbird (Molothrus bonariensis) - Species sheet. Acceded from https://www.ecoregistros.org on 18/04/2026.