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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: 426198
♂ ♀
  Adult

Río Grande
Tierra del Fuego
Argentina
11/06/2018
Nino A. Grangetto
Foto
Photography ID: 307954
  Adult

Humedal de Batuco
Región Metropolitana
Chile
03/25/2018
Pablo Moya Arias
Foto
Photography ID: 307636
  Immature

Parque Provincial El Tromen
Neuquén
Argentina
12/20/2018
Dolores Fernandez
Foto
Photography ID: 291417
♂ ♀
  Adult

Marcos Juárez
Córdoba
Argentina
06/17/2018
Max Uranga
Foto
Photography ID: 290516
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
10/06/2018
Pablo Moreno
Foto
Photography ID: 284646
  Immature

Tandil
Buenos Aires
Argentina
08/29/2018
Santiago Juan Torres



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
105375324/12/2018ArgentinaChubutCamarones, Florentino Ameghino10Julian Quillen Vidoz
105376321/12/2018ArgentinaSanta CruzLa Angostura y Alto Río Chico (AICA SC07), Río Chico2Julian Quillen Vidoz
105376220/12/2018ArgentinaSanta CruzEstancia Laguna Verde20Julian Quillen Vidoz
86109120/12/2018ArgentinaNeuquénParque Provincial El TromenDolores Fernandez
105376519/12/2018ArgentinaSanta CruzEl Zurdo (AICA SC11)6Julian Quillen Vidoz
105375518/12/2018ArgentinaSanta CruzRío Turbio, Güer Aike3Julian Quillen Vidoz
105376117/12/2018ArgentinaSanta CruzEstancia Laguna Verde30Julian Quillen Vidoz
85511506/12/2018ArgentinaSanta CruzReserva Laguna Nimez2Nicolas Fabian Fontanella
85304430/11/2018ArgentinaNeuquénParque Nacional Laguna BlancaNicolas Olejnik
84882228/11/2018ArgentinaSanta CruzCamino sin nombrar (-49,160752, -67,615427)1Mariano Costa
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.