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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 Provincial El Tromen


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: 610978
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
11/19/2024
Dolores Fernandez
Foto
Photography ID: 437222
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
03/11/2021
Ricardo Juliano
Foto
Photography ID: 437221
♂ ♀
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
03/11/2021
Ricardo Juliano
Foto
Photography ID: 427178
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
12/29/2020
Dolores Fernandez
Foto
Photography ID: 307636
  Immature

Parque Provincial El Tromen
Neuquén
Argentina
12/20/2018
Dolores Fernandez
Foto
Photography ID: 254210
♂ ♀
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
03/03/2018
Hugo Caverzasi
Foto
Photography ID: 253260
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
10/13/2013
Silvio Montani
Foto
Photography ID: 178150
  Adult

Parque Provincial El Tromen
Neuquén
Argentina
11/26/2016
Dolores Fernandez



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
220094619/11/2024ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
167907125/11/2022ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
138356921/03/2021ArgentinaNeuquénParque Provincial El Tromen3Nicolas Olejnik
137950911/03/2021ArgentinaNeuquénParque Provincial El TromenRicardo Juliano
137353731/01/2021ArgentinaNeuquénEscorial, Parque Provincial El TromenVictor Hugo Michelini
136650131/01/2021ArgentinaNeuquénParque Provincial El Tromen2Héctor Horacio García
136595630/01/2021ArgentinaNeuquénParque Provincial El Tromen4Héctor Horacio García
134089629/12/2020ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
86109120/12/2018ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
71401103/03/2018ArgentinaNeuquénParque Provincial El TromenHugo Caverzasi
Page 1

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Citation recommended:

EcoRegistros. 2026. Least Seedsnipe (Thinocorus rumicivorus) - Species sheet. Acceded from https://www.ecoregistros.org on 07/04/2026.