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Mimus saturninus

Chalk-browed Mockingbird


Mimus saturninus

(Lichtenstein, MHC, 1823)
Calandria Grande
Sabiá-do-campo

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

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Records from Castelar

Conservation status according to BirdLife International: Least Concern


Description


A medium-sized and slender mockingbird with an upright posture and a clean, elongated profile. Its plumage is mostly grayish to brownish, with subtle streaking on the breast and flanks and paler underparts. The wings show a contrasting pattern of dark and light patches, especially noticeable in flight. It has a slightly curved, fine bill suitable for probing insects and fruit. The yellowish eyes give it a sharp, alert expression. Juveniles display a duller and less contrasted appearance.

Geographical distribution: It occurs widely across South America, from central and eastern Brazil through Paraguay, Bolivia, Uruguay, and much of Argentina, occupying open and semi-open landscapes. It thrives in dry regions, savannas, pampas and even suburban environments.

Habitat: Inhabits open grasslands, scrublands, forest edges, rural environments and urban areas, where it adapts readily. It is frequently observed in gardens, parks and areas with scattered shrubs, often using exposed branches, posts or human-made structures as vantage points.

Diet: Its diet is omnivorous and opportunistic, including insects, small invertebrates, fleshy fruits, seeds and occasionally human-related food items. It forages mainly on the ground, walking with confident steps and pausing to inspect leaf litter or cavities for prey.

Behavior: A highly territorial species, especially during the breeding season. Its song is strong, varied and persistent, often including imitations of other birds. It tends to be bold and active, regularly perching on elevated lookouts. In human-modified areas it may form small family groups and defend resources vigorously.

Breeding: Builds an open and bulky nest of twigs and plant fibers in shrubs, medium-height trees or artificial structures. The clutch typically contains 2 to 4 eggs. The female performs most of the incubation, while both adults defend the territory and feed the chicks until independence.

Conservation status: Classified as Least Concern (LC) globally, supported by its broad range, adaptability and stable populations. It thrives in altered landscapes and often expands into human-modified areas.


Author of this compilation: EcoRegistros – 08/12/2025





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Foto
Photography ID: 683670
  Adult

Castelar
Buenos Aires
Argentina
04/25/2026
Patricio Molina
Foto
Photography ID: 449707
  Adult

Castelar
Buenos Aires
Argentina
01/01/2021
Matias Petroccello
Foto
Photography ID: 125229
  Adult

Castelar
Buenos Aires
Argentina
11/14/2015
Román Montero
Foto
Photography ID: 114984
  Adult

Castelar
Buenos Aires
Argentina
09/19/2015
Román Montero
Foto
Photography ID: 105707
  Adult

Castelar
Buenos Aires
Argentina
07/12/2015
Román Montero
Foto
Photography ID: 95970
  Juvenile

Castelar
Buenos Aires
Argentina
04/26/2015
Román Montero



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 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
247371724/05/202610:21ArgentinaBuenos AiresJuan Nicolás Rojas 346, CastelarJorgelina Lopez
246260025/04/202622:03ArgentinaBuenos AiresReserva Natural Urbana de Morón, Castelar1Patricio Molina
151531613/12/2021ArgentinaBuenos AiresPlaza Cumelén (plaza del Vagón), CastelarRomán Montero
137839707/03/2021ArgentinaBuenos AiresCastelarRomán Montero
134408305/01/2021ArgentinaBuenos AiresCastelar1Nicolas Olejnik
141425601/01/2021ArgentinaBuenos AiresCastelarMatias Petroccello
133707526/12/2020ArgentinaBuenos AiresCastelarRomán Montero
92776331/05/2019ArgentinaBuenos AiresCastelarRomán Montero
83708311/11/2018ArgentinaBuenos AiresCastelarNicolas Olejnik
36224614/11/2015ArgentinaBuenos AiresCastelarRomán Montero
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Chalk-browed Mockingbird (Mimus saturninus) – Species account. Accessed from www.ecoregistros.org on 20/09/2026.