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Grass Wren - BirdForum Opus

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Austral Wren group, falklandicus subspecies.
Photo © by crispash
Near Lighthouse, Stanley, Falkland Islands, March 2005
Cistothorus platensis



Paramo Wren aequatorialis group
Photo © by Ecuadorrebel
Cotopaxi, Ecuador, September 2010

From Mexico through Central and South America to the Falkland Islands.


Previously included in Sedge Wren.


Juvenile of the Austral Grass Wren group, falklandicus subspecies.
Photo © by Joseph Morlan
Gypsy Cove, Stanley, Falkland Islands, 3 March 2018

Seventeen subspecies are recognized[1]. Northern Grass Wren Group - Highlands of Middle America

  • C. p. tinnulus: Western Mexico (Nayarit to Michoacán, México and Distrito Federal)
  • C. p. potosinus: North-central Mexico (San Luis Potosí)
  • C. p. jalapensis: Eastern Mexico (interior central Veracruz to Orizaba region)
  • C. p. warneri: Tropical southern Mexico (Veracruz, Tabasco and western Chiapas)
  • C. p. elegans: South-central Guatemala
  • C. p. russelli: Pine ridge region of Belize
  • C. p. graberi: Eastern Honduras to north-eastern Nicaragua
  • C. p. lucidus: Subtropical central Costa Rica to western Panama (Chiriquí)

Venezuelan Grass Wren Group - Tepuis of Venezuela.

Paramo Grass Wren Group - Paramos of Andean Venezuela, Colombia south to N Peru.

  • C. p. aequatorialis: Central and Western Andes of southern Colombia and Ecuador

Junin Grass Wren Group - Highlands of N Peru, Junin.

  • C. p. graminicola: Andes from southern Ecuador south through Peru to northwestern Bolivia (La Paz)

Puna Grass Wren Group - Ayacucho Peru to Altiplano of Bolivia.

  • C. p. minimus: Southern Peru in Puno (Oconeque)

Tucuman Grass Wren Group - Santa Cruz, Bolivia south to Cordoba, Argentina.

  • C. p. tucumanus: North-western Argentina (Jujuy to Catamarca and Tucumán)

Pampas Grass Wren Group - Lowlands of Bolivia east through Paraguay and S Brazil south through Uruguay to central Argentina.

  • C. p. polyglottus: South-eastern Brazil (Goiás and Minas Gerais) to Paraguay and north-eastern Argentina
  • C. p. platensis: Central and eastern Argentina to Córdoba and Mendoza

Austral Grass Wren Group - Chile, Pagagonia & the Falklands

  • C. p. hornensis: Southern Argentina (Neuquén) and Chile (Coquimbo) to Tierra del Fuego
  • C. p. falklandicus: Falkland Islands


In the north of South America limited to mountain ranges, but in the southern cone more widespread.




  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
  2. Herkert, J. R., D. E. Kroodsma, and J. P. Gibbs (2021). Grass Wren (Cistothorus platensis), version 1.1. In Birds of the World (Editor not available). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173
  3. Robbins, M.B. & Nyári, Á.S. (2014) Canada to Tierra del Fuego: species limits and historical biogeography of the Sedge Wren (Cistothorus platensis). Wilson J. Orn. 126(4): 649–662.
  4. Traylor, M. A. 1988. Geographic variation and evolution in South American Cistothorus platensis (Aves: Troglodytidae). Fieldiana Zool. no. 48:1-35.

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