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


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: 679376
  Adult

Partido de Loberia
Buenos Aires
Argentina
01/30/2020
Gustavo Abel Larracoechea
Foto
Photography ID: 485461
  Adult

Huerta grande
Córdoba
Argentina
12/31/2020
Walter Bustamante
Foto
Photography ID: 480880
  Adult

Ribeirão Pires
São Paulo
Brazil
12/20/2020
Horacio Alberto Garcia
Foto
Photography ID: 477614
  Adult

Córdoba
Córdoba
Argentina
12/20/2020
Marcelo A Carranza
Foto
Photography ID: 434924
  Immature

Embalse de Río Tercero
Córdoba
Argentina
12/28/2020
Daniel Oscar Serra
Foto
Photography ID: 427903
  Adult

Laguna Tupungato
Buenos Aires
Argentina
12/08/2020
Victor Hugo Michelini
Foto
Photography ID: 427713
  Juvenile

Manzano Historico
Mendoza
Argentina
12/27/2020
Jorge Schlemmer
Foto
Photography ID: 427670
  Adult

Las Mojarras
Córdoba
Argentina
12/31/2020
Jorge Schlemmer



 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
155718431/12/2020ArgentinaCórdobaHuerta grandeWalter Bustamante
134646831/12/2020ArgentinaBuenos AiresSierra de la VentanaPablo Echevarría
134429931/12/2020ArgentinaBuenos AiresReserva Natural Punta LaraFacundo Irazoqui
134313831/12/2020ArgentinaBuenos AiresPedro Luro, Partido de VillarinoHernán Tolosa
134261031/12/2020ArgentinaCórdobaPuente Las Mojarras Dpto Gral San Martin, Las MojarrasJorge Schlemmer
134021831/12/2020ArgentinaCórdobaLas MojarrasHugo Caverzasi
222489730/12/2020ParaguaySan PedroCasa de Oma y OpaDominic Oviedo Löwen
133877830/12/2020ArgentinaSanta FeAvenida General López 3681, Santa Fe63Gustavo Fernando Durán
142064029/12/2020ArgentinaMendozaSan Rafael3Gabriel Carbajales
142068428/12/2020ArgentinaMendozaSan Rafael4Gabriel Carbajales
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.