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Least Seedsnipe

Thinocorus rumicivorus
Eschscholtz, F, 1829
Agachona Chica
Agachadeira-mirim

Family: Thinocoridae
Order: Charadriiformes
Class: Aves
Phylum / Division: Chordata
Kingdom: Animalia

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Description: Small seedsnipe measuring 18–19 cm, the smallest of the family. Compact body with small head, short neck, and short wedge-shaped tail. Cryptic plumage in cinnamon, beige, and brown tones with fine vermiculations. In flight, wings long and pointed; above similar to the back, below with contrast between dark coverts and white areas. Bill short, conical, yellowish with black tip, with a sheath at the base protecting the nostrils in windy, dry, and dusty environments. Legs yellow. Shows sexual dimorphism. Male: white throat, gray chest with a marked vertical black line dividing it, and well-defined black collar; belly white. Female: duller, with ochraceous head and chest heavily streaked. Juvenile similar to female. Very similar to the Ornate Seedsnipe (T. orbignyianus), with which it coexists: the male of this species is distinguished by the vertical black line on the chest, absent in the collared species. Females are very difficult to distinguish in the field.

Distribution: Broad distribution in South America along the Andes from Ecuador to Patagonia of Chile and Argentina, reaching Uruguay and southeastern Brazil during winter migration. In Argentina it presents two main subspecies: North (bolivianus): from northwestern Argentina (Jujuy to Mendoza), in high Andean environments. South (rumicivorus): Patagonia, breeding; in winter migrates north and east within the country, inhabiting plains and open fields, and occasionally recorded in the Falkland Islands. Performs partial migrations and altitudinal movements.

Habitat: Inhabits open environments: steppes, plains, scattered scrub, rocky slopes, and high Andean valleys. In the north it occurs at high elevations, while in Patagonia it may be found from sea level.

Behavior: Terrestrial species, generally in pairs or small groups; outside the breeding season may form flocks. Cryptic behavior, often remaining motionless or crouching to avoid detection. Walks slowly, alternating with rapid movements while feeding. Flight low, fast, and erratic, with abrupt changes in direction. Emits sharp, whistled, rapid vocalizations, more variable than in the collared seedsnipe, usually from the ground or in flight. The male plays a territorial and sentinel role during breeding.

Diet: Feeds mainly on plant material: shoots, leaves, and seeds; forages on the ground, alone or in small groups, pecking continuously.

Breeding: Nests on the ground, in a simple depression in open environments. Clutch of 3 to 4 eggs, pale with spots. Chicks are precocial and highly cryptic.

Conservation status: In Argentina it is categorized as Not Threatened (NT) and globally as Least Concern (LC). Locally common in suitable habitats, but potentially affected by habitat modification, especially mining and overgrazing.


Author of this compilation: Diego Carus and María Belén Dri – 03/04/2026





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Number of Photography: 395

Foto
Photography ID: 681230
  Adult

Entre Trelew y Punta Tombo
Chubut
Argentina
04/04/2026
Marcelo Funes
Foto
Photography ID: 681118
  Adult

Eduardo Castex
La Pampa
Argentina
02/25/2026
Alicia Mayor
Foto
Photography ID: 681033
  Adult

Río Grande
Tierra del Fuego
Argentina
03/13/2026
Edgar Romeo
Foto
Photography ID: 681032
  Adult

Río Grande
Tierra del Fuego
Argentina
03/13/2026
Edgar Romeo
Foto
Photography ID: 679347
♂ ♀
  Adult

Río Grande
Tierra del Fuego
Argentina
03/11/2026
Oscar Alfredo Eliseche
Foto
Photography ID: 679346
♂ ♀
  Adult

Río Grande
Tierra del Fuego
Argentina
03/11/2026
Oscar Alfredo Eliseche
Foto
Photography ID: 676710
  Adult

Cabo Virgenes
Santa Cruz
Argentina
01/06/2026
Gustavo Daniel González
Foto
Photography ID: 676709
  Adult

Cabo Virgenes
Santa Cruz
Argentina
01/06/2026
Gustavo Daniel González
Foto
Photography ID: 676575
  Adult

Río Gallegos
Santa Cruz
Argentina
01/05/2026
Gustavo Daniel González
Foto
Photography ID: 676570
  Adult

Rn 3
Santa Cruz
Argentina
01/05/2026
Gustavo Daniel González



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Number of Recorded Vocalizations: 2



Audio playerUserDateCountryProvincePlaceSexLife stageIt was observedDetails
Juan Atenzio05/05/2024ArgentinaBuenos AiresCampo cercano a la laguna La CordobesaSaladilloIndistinguishableAdultYesNo
Santiago Sainz-trápaga10/26/2014ArgentinaChubutPunta DelgadaÁrea Natural Protegida Península ValdésAdultYesNo


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Number of Films: 3


Video ID: 3973
♂ ♀
  Adult

Altas cumbres
Córdoba
Argentina
09/17/2019
Pablo Capovilla
Video ID: 1025
  Adult

Cabo Virgenes
Santa Cruz
Argentina
02/15/2013
Claudia Mora
Video ID: 893
♂ ♀
  Adult

Puerto Deseado
Santa Cruz
Argentina
01/30/2015
Ruben Russo


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 Reports


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Number of Records: 921



Page 1 of 93
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
245589504/04/2026ArgentinaChubutEntre Trelew y Punta TomboMarcelo Funes
245545902/04/2026ArgentinaCatamarcaRuta nacional Nº 60, antes de Paso San FranciscoFederico Carlos Izasa
245534213/03/2026ArgentinaTierra del FuegoLaguna de los cisnes ruta 5, Río GrandeEdgar Romeo
245159311/03/2026ArgentinaTierra del FuegoRío Grande, Río GrandeOscar Alfredo Eliseche
245557025/02/2026ArgentinaLa PampaCampo Yardina, Eduardo CastexAlicia Mayor
242399110/01/2026ArgentinaSanta CruzEx ejercito, Avenida Ricardo Balbín - Río GallegosGraciela Viviana
244312206/01/2026ArgentinaSanta CruzCabo VirgenesGustavo Daniel González
244260505/01/2026ArgentinaSanta CruzPunta Loyola, Río GallegosGustavo Daniel González
244260005/01/2026ArgentinaSanta CruzRn 3Gustavo Daniel González
242081804/01/2026ArgentinaSanta CruzRuta 40 ( los 73 km malditos)Hernán Tolosa
Page 1 of 93

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Citation recommended:

EcoRegistros. 2026. Least Seedsnipe (Thinocorus rumicivorus) - Species sheet. Acceded from https://www.ecoregistros.org on 05/04/2026.