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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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Last published photographs

Foto
Photography ID: 657637
  Adult

Lobería
Buenos Aires
Argentina
08/03/2025
Susana Gomez
Foto
Photography ID: 626012
  Adult

Vía Sin Nombre
Chubut
Argentina
03/05/2025
Susana Gomez
Foto
Photography ID: 591652
 
Lobería
Buenos Aires
Argentina
07/14/2024
Susana Gomez
Foto
Photography ID: 585638
  Adult

Lobería
Buenos Aires
Argentina
05/28/2024
Susana Gomez
Foto
Photography ID: 585637
  Adult

Lobería
Buenos Aires
Argentina
05/28/2024
Susana Gomez
Foto
Photography ID: 585636
  Adult

Lobería
Buenos Aires
Argentina
05/28/2024
Susana Gomez
Foto
Photography ID: 533342
  Adult

Río Grande
Tierra del Fuego
Argentina
04/27/2023
Susana Gomez
Foto
Photography ID: 529888
  Adult

Lobería
Buenos Aires
Argentina
03/28/2023
Susana Gomez
Foto
Photography ID: 500843
 

Punta Loyola
Santa Cruz
Argentina
07/16/2022
Susana Gomez
Foto
Photography ID: 500842
 

Punta Loyola
Santa Cruz
Argentina
07/16/2022
Susana Gomez
Foto
Photography ID: 495647
  Adult

Lobería
Buenos Aires
Argentina
06/04/2022
Susana Gomez
Foto
Photography ID: 452647
  Adult

Lobería
Buenos Aires
Argentina
07/04/2021
Susana Gomez



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
236369303/08/2025ArgentinaBuenos AiresLos Carpinchos, Lobería8Susana Gomez
236381309/07/2025ArgentinaBuenos AiresLos Carpinchos, Lobería68Susana Gomez
236389005/07/2025ArgentinaBuenos AiresLos Carpinchos, Lobería89Susana Gomez
226199605/03/2025ArgentinaChubutVía Sin NombreSusana Gomez
211090314/07/2024ArgentinaBuenos AiresLos Carpinchos, Lobería52Susana Gomez
203871028/05/2024ArgentinaBuenos AiresLos Carpinchos, LoberíaSusana Gomez
175888327/04/2023ArgentinaTierra del FuegoRío GrandeSusana Gomez
174046528/03/2023ArgentinaBuenos AiresLos Carpinchos, LoberíaSusana Gomez
161080916/07/2022ArgentinaSanta CruzRuta Nacional 40 (-51,611492, -69,015460), Punta LoyolaSusana Gomez
159103604/06/2022ArgentinaBuenos AiresLos Carpinchos, LoberíaSusana Gomez
Page 1

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Citation recommended:

EcoRegistros. 2026. Least Seedsnipe (Thinocorus rumicivorus) - Species sheet. Acceded from https://www.ecoregistros.org on 11/04/2026.