Don't want to see ads? Sign up...




Species icon
Shiny Cowbird

Molothrus bonariensis
(Gmelin, JF, 1789)
Tordo Renegrido
Chupim

Family: Icteridae
Order: Passeriformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

 Request change
Filters

Records from Rosario

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




Loading map...




Last published photographs

Foto
Photography ID: 680253
  Adult

Rosario
Santa Fe
Argentina
03/29/2026
Gaston Lisandro Gabinetti
Foto
Photography ID: 680191
  Adult

Rosario
Santa Fe
Argentina
03/29/2026
Peter Vidana
Foto
Photography ID: 656425
  Adult

Rosario
Santa Fe
Argentina
10/12/2025
Peter Vidana
Foto
Photography ID: 617442
  Adult

Rosario
Santa Fe
Argentina
11/18/2024
Peter Vidana
Foto
Photography ID: 401350
  Adult

Rosario
Santa Fe
Argentina
06/19/2020
Lotfi Si Saber
Foto
Photography ID: 367824
 

Rosario
Santa Fe
Argentina
12/13/2019
Lotfi Si Saber
Foto
Photography ID: 327049
  Fledgling

Rosario
Santa Fe
Argentina
03/04/2019
Elisabet Giusti
Foto
Photography ID: 327048
  Fledgling

Rosario
Santa Fe
Argentina
03/04/2019
Elisabet Giusti
Foto
Photography ID: 275762
♂ ♀
  Adult

Rosario
Santa Fe
Argentina
07/15/2018
Andrés Cecconi
Foto
Photography ID: 239756
  Juvenile

Rosario
Santa Fe
Argentina
10/03/2016
Elisabet Giusti
Foto
Photography ID: 134877
  Squab

Rosario
Santa Fe
Argentina
12/31/2015
Elisabet Giusti



 View all photographs of the species




 Add a photography of this species





Last Vocalizations published




 Add an audio of this species





Last Filmings published




 Add a film of this species





 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
245400029/03/2026ArgentinaSanta FePaseo de la diversidad, RosarioGaston Lisandro Gabinetti
245381329/03/2026ArgentinaSanta FePaseo de la diversidad, RosarioPeter Vidana
237351612/10/2025ArgentinaSanta FePaseo de la diversidad, RosarioPeter Vidana
223013418/11/2024ArgentinaSanta FeParque España, RosarioPeter Vidana
126432719/06/2020ArgentinaSanta FeParque de la Independencia, RosarioLotfi Si Saber
117760726/01/2020ArgentinaSanta FeBosque de los Constituyentes, Rosario5Leonardo Caballero
114735613/12/2019ArgentinaSanta FeParque de la Independencia, RosarioLotfi Si Saber
110160628/09/2019ArgentinaSanta FeBoulevard Oroño 1800, Rosario2Gustavo Fernando Durán
90807704/03/2019ArgentinaSanta FeZona urbana (zona Sur de Rosario), RosarioElisabet Giusti
77900115/07/2018ArgentinaSanta FeBosque de los Constituyentes, RosarioAndrés Cecconi
Page 1

 Add a record of this species

Citation recommended:

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