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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: 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: 591899
  Adult

Balcarce
Buenos Aires
Argentina
07/17/2024
Edgar Romeo
Foto
Photography ID: 591898
  Adult

Balcarce
Buenos Aires
Argentina
07/17/2024
Edgar Romeo
Foto
Photography ID: 585632
  Adult

Valle Grande
Jujuy
Argentina
04/21/2024
Edgar Romeo
Foto
Photography ID: 445681
  Adult

Balcarce
Buenos Aires
Argentina
05/16/2021
Edgar Romeo
Foto
Photography ID: 445665
  Adult

Ruta nacional 40
Santa Cruz
Argentina
02/27/2021
Edgar Romeo
Foto
Photography ID: 347157
  Adult

Partido de Tres Arroyos
Buenos Aires
Argentina
06/26/2019
Edgar Romeo
Foto
Photography ID: 267360
  Adult

San Cayetano
Buenos Aires
Argentina
05/26/2018
Edgar Romeo
Foto
Photography ID: 267357
  Adult

San Cayetano
Buenos Aires
Argentina
05/26/2018
Edgar Romeo



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
245534213/03/2026ArgentinaTierra del FuegoLaguna de los cisnes ruta 5, Río GrandeEdgar Romeo
211290117/07/2024ArgentinaBuenos AiresCabaña San Juan, BalcarceEdgar Romeo
203869921/04/2024ArgentinaJujuyValle GrandeEdgar Romeo
140614016/05/2021ArgentinaBuenos AiresEntre Napaleofu y Balcarce, BalcarceEdgar Romeo
140612427/02/2021ArgentinaSanta CruzLago Cardiel, Ruta nacional 40Edgar Romeo
96338426/06/2019ArgentinaBuenos AiresRio quequen Salado, Partido de Tres ArroyosEdgar Romeo
76235026/05/2018ArgentinaBuenos AiresSantuario Natural del Cauquén Colorado, San CayetanoEdgar Romeo
Page 1

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Citation recommended:

EcoRegistros. 2026. Least Seedsnipe (Thinocorus rumicivorus) - Species sheet. Acceded from https://www.ecoregistros.org on 12/04/2026.