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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: 585573
  Adult

Tornquist
Buenos Aires
Argentina
09/01/2020
Gustavo Abel Larracoechea
Foto
Photography ID: 427178
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
12/29/2020
Dolores Fernandez
Foto
Photography ID: 421942
  Fledgling

RN Lomas de Lachay
Lima
Peru
11/06/2020
Rutger Koperdraad
Foto
Photography ID: 417841
  Immature

San José del Rincón
Santa Fe
Argentina
05/18/2020
Maximiliano Gili
Foto
Photography ID: 416674
  Adult

Ruta 1 a Cabo Raso
Chubut
Argentina
10/23/2020
Zulima América Schupbach
Foto
Photography ID: 416233
  Adult

Ruta 1 a Cabo Raso
Chubut
Argentina
10/23/2020
Zulima América Schupbach
Foto
Photography ID: 416232
♂ ♀
  Adult

Ruta 1 a Cabo Raso
Chubut
Argentina
10/23/2020
Zulima América Schupbach
Foto
Photography ID: 416231
♂ ♀
  Adult

Ruta 1 a Cabo Raso
Chubut
Argentina
10/23/2020
Zulima América Schupbach
Foto
Photography ID: 412132
♂ ♀
  Adult

Ruta 1 a Isla Escondida
Chubut
Argentina
09/15/2020
Zulima América Schupbach
Foto
Photography ID: 412131
♂ ♀
  Adult

Ruta 1 a Isla Escondida
Chubut
Argentina
09/15/2020
Zulima América Schupbach



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
134089629/12/2020ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
132102606/11/2020PeruLimaRN Lomas de LachayRutger Koperdraad
130724528/10/2020ArgentinaMendozaRuta 13, Ruta 13, Las HerasMatias Pescara
130357723/10/2020ArgentinaChubutRuta 1 a Cabo Raso2Zulima América Schupbach
130040617/10/2020ArgentinaChubutRuta 1 a Isla EscondidaZulima América Schupbach
156996915/09/2020ArgentinaChubutRuta 1 a Isla EscondidaZulima América Schupbach
128974315/09/2020ArgentinaChubutRuta 1 a Isla Escondida4Zulima América Schupbach
203852101/09/2020ArgentinaBuenos AiresTres Picos, TornquistGustavo Abel Larracoechea
128117519/08/2020ArgentinaBuenos AiresTandilSantiago Juan Torres
127856007/08/2020ArgentinaBuenos AiresCamino sin nombrarSantiago Juan Torres
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.