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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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Records from Uruguay


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: 647400
  Adult

Playa Penino
San José
Uruguay
05/03/2025
Adrian Antunez
Foto
Photography ID: 555791
♂ ♀
  Adult

Laguna del Cisne
Canelones
Uruguay
05/07/2023
Mauricio Silvera
Foto
Photography ID: 452707
  Adult

Punta Carretas
Montevideo
Uruguay
07/05/2021
Guillermo Menéndez
Foto
Photography ID: 444666
  Adult

Laguna de Rocha
Rocha
Uruguay
05/15/2021
Mauricio Silvera
Foto
Photography ID: 265559
  Immature

Montevideo
Montevideo
Uruguay
05/13/2016
Emilio Lessa
Foto
Photography ID: 262564
  Adult

Punta Carretas
Montevideo
Uruguay
04/30/2018
Julio Cesar Castillo Yazauskas
Foto
Photography ID: 262520
  Adult

Punta Carretas
Montevideo
Uruguay
04/30/2018
Adrian Antunez
Foto
Photography ID: 52562
  Adult

Paso Carrasco
Canelones
Uruguay
04/09/2014
Gustavo Miguel Casás Ksiazenicki



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
233985903/05/2025UruguaySan JoséPlaya penino, Playa PeninoAdrian Antunez
191140407/05/2023UruguayCanelonesLaguna del CisneMauricio Silvera
142369105/07/2021UruguayMontevideoPunta CarretasGuillermo Menéndez
140343215/05/2021UruguayRochaLaguna de RochaMauricio Silvera
75083730/04/2018UruguayMontevideoPunta CarretasJulio Cesar Castillo Yazauskas
75069830/04/2018UruguayMontevideoPunta CarretasAdrian Antunez
75827113/05/2016UruguayMontevideoDesembocadura del Arroyo Carrasco, MontevideoEmilio Lessa
75402605/07/2015UruguayFloridaEstancia cercana a Ruta 6 y 58, cerca de San Pedro de Timote.Emilio Lessa
15041209/04/2014UruguayCanelonesAeropuerto Internacional de Carrasco, Paso CarrascoGustavo Miguel Casás Ksiazenicki
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.