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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 Parque Nacional Laguna Blanca


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: 360899
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
11/05/2019
Gustavo Castaing
Foto
Photography ID: 360898
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
11/05/2019
Gustavo Castaing
Foto
Photography ID: 253910
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/21/2018
Sergio Cusano
Foto
Photography ID: 253909
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/21/2018
Sergio Cusano
Foto
Photography ID: 252871
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/21/2018
Eduardo Cusano
Foto
Photography ID: 252870
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/21/2018
Eduardo Cusano
Foto
Photography ID: 252256
  Juvenile

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/16/2018
Pablo Eguia
Foto
Photography ID: 252255
  Juvenile

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/16/2018
Pablo Eguia
Foto
Photography ID: 252254
  Juvenile

Parque Nacional Laguna Blanca
Neuquén
Argentina
02/16/2018
Pablo Eguia
Foto
Photography ID: 135290
  Adult

Parque Nacional Laguna Blanca
Neuquén
Argentina
01/05/2016
Federico Galfione



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 Reports


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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
112671205/11/2019ArgentinaNeuquénEscorial, Parque Nacional Laguna BlancaGustavo Castaing
85304430/11/2018ArgentinaNeuquénParque Nacional Laguna BlancaNicolas Olejnik
71321021/02/2018ArgentinaNeuquénParque Nacional Laguna BlancaSergio Cusano
71100421/02/2018ArgentinaNeuquénParque Nacional Laguna BlancaEduardo Cusano
70892716/02/2018ArgentinaNeuquénParque Nacional Laguna BlancaPablo Eguia
39477105/01/2016ArgentinaNeuquénParque Nacional Laguna BlancaFederico Galfione
39057705/01/2016ArgentinaNeuquénParque Nacional Laguna Blanca2Andres Teran
10593822/01/2014ArgentinaNeuquénParque Nacional Laguna BlancaJorge La Grotteria
5082620/01/2013ArgentinaNeuquénParque Nacional Laguna BlancaJorge La Grotteria
105376420/12/2003ArgentinaNeuquénParque Nacional Laguna Blanca11Julian Quillen Vidoz
Page 1

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Citation recommended:

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