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Species icon
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 Mendoza


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: 603920
  Adult

Villavicencio
Mendoza
Argentina
09/26/2024
Emilio Martin Perez
Foto
Photography ID: 524546
♂ ♀
  Adult

Valle Hermoso
Mendoza
Argentina
02/10/2023
Pablo Moreno
Foto
Photography ID: 509388
♂ ♀
  Adult

La Carrera
Mendoza
Argentina
10/01/2022
Pablo Moreno
Foto
Photography ID: 483474
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
02/20/2022
Emilio Martin Perez
Foto
Photography ID: 478892
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
01/09/2022
Emilio Martin Perez
Foto
Photography ID: 478891
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
01/09/2022
Emilio Martin Perez
Foto
Photography ID: 477989
  Adult

Laguna del Diamante
Mendoza
Argentina
01/03/2022
Carlos Schmidt
Foto
Photography ID: 457694
  Adult

Ruta 13, Las Heras
Mendoza
Argentina
01/07/2021
Valentín González Feltrup
Foto
Photography ID: 386101
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
02/24/2020
Emilio Martin Perez
Foto
Photography ID: 368674
  Adult

Los Molles
Mendoza
Argentina
10/01/2017
Raúl Mauro Abalos
Foto
Photography ID: 326910
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
03/09/2019
Emilio Martin Perez
Foto
Photography ID: 290516
  Adult

Reserva Natural Villavicencio
Mendoza
Argentina
10/06/2018
Pablo Moreno



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
225776927/02/2025ArgentinaMendozaReserva Natural Villavicencio2Emilio Martin Perez
225779511/02/2025ArgentinaMendozaRuta provincial 226 a Planchon Vergara, Las Loicas2Emilio Martin Perez
224599211/02/2025ArgentinaMendozaRuta 226, Malargüe2Emilio Martin Perez
224280331/01/2025ArgentinaMendozaReserva Natural Villavicencio1Emilio Martin Perez
216411226/09/2024ArgentinaMendozaVillavicencioEmilio Martin Perez
191448720/11/2023ArgentinaMendozaLaguna Blanca3Pablo Serur
172350010/02/2023ArgentinaMendozaRio Tordillo, Valle Hermoso4Pablo Moreno
171596329/01/2023ArgentinaMendozaPampa fria3Pablo Moreno
168389103/12/2022ArgentinaMendozaLas Carreras - Ruta Provincial 893Pablo Moreno
164785301/10/2022ArgentinaMendozaLa Carrera11Pablo Moreno
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.