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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 General Lavalle

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: 671598
  Adult

General Lavalle
Buenos Aires
Argentina
02/01/2026
Celina Emilia Iratchet
Foto
Photography ID: 77639
  Adult

General Lavalle
Buenos Aires
Argentina
01/18/2015
Facundo Quintela



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Last Filmings published


Video ID: 517
  Juvenile

General Lavalle
Buenos Aires
Argentina
12/07/2012
Santos Di Mauro



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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
242854801/02/2026ArgentinaBuenos AiresGral. Lavalle - Paraje Pavón, General LavalleCelina Emilia Iratchet
238911911/10/2025ArgentinaBuenos AiresRuta Provincial 11, General Lavalle9Julian Uriel Collado
220126925/11/2024ArgentinaBuenos AiresCamino de la Corvina, General Lavalle6Diego Oscar
223247912/10/2024ArgentinaBuenos AiresEa. El Palenque, General Lavalle6Silvina Collado
217071312/10/2024ArgentinaBuenos AiresEa. El Palenque, General Lavalle6Julian Uriel Collado
213588818/08/2024ArgentinaBuenos AiresGeneral Lavalle6Diego Oscar
206320721/12/2022ArgentinaBuenos AiresEa. El Palenque, General Lavalle3Lautaro Pereira
169595012/12/2022ArgentinaBuenos AiresRuta vieja (altura Santa Teresita), General LavallePablo Eguia
152650402/01/2022ArgentinaBuenos AiresCamino rural ingresando por El Palenque, General Lavalle14Fernando Alberto Segura
136062903/01/2021ArgentinaBuenos AiresGeneral Lavalle1Facundo Quintela
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.