C. p. polyglottus Serra da Canastra National Park, Brasil
The grass wren (Cistothorus platensis) is a
species of
passerine bird in the family
Troglodytidae. It is widely distributed in central and southern America.[2]
The grass wren is 10 to 10.5 cm (3.9 to 4.1 in) long. Its upperparts are buffy brown with black and buffy whitish streaks on the back. The wings and tail have dusky bands. Its underparts are mostly buffy.[11]
Distribution and habitat
The grass wren is found discontinuously from central Mexico south through Belize, Guatemala, Honduras, and Nicaragua into Costa Rica, in every mainland South American country except French Guiana and Suriname, and the Falkland Islands.[2][12]
In Colombia and Ecuador, the grass wren inhabits moist grassy and sedgy parts of
paramo, clearings, agricultural areas, and interandean valleys.[11][13] In Brazil it inhabits
cerrado, grassland, and marshes.[14]
Behavior
Non-breeding
Grass wrens build two types of non‐breeding nest structures: platforms and dummy nests. Platforms are rudimentary accumulations of grasses concealed between vegetation. Dummy and breeding nests are dome‐shaped with a similar structural layer. The function of these non-breeding nests is unclear, but an experimental study suggests that building non‐breeding nests may be an attempt by males to manipulate the decision of females to breed with a mate they might otherwise reject or to start reproduction earlier than optimal for the females.[15]
^Robbins, Mark B.; Nyári, Árpád S. (2014). "Canada to Tierra del Fuego: species limits and historical biogeography of the Sedge Wren (Cistothorus platensis)". Wilson Journal of Ornithology. 126 (4): 649–662.
doi:
10.1676/13-162.1.
S2CID86234438.
^Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 August 2021. A classification of the bird species of South America. American Ornithological Society.
https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved August 24, 2021
^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/ Retrieved August 25, 2021
^
abRidgely, Robert S.; Greenfield, Paul J. (2001). The Birds of Ecuador. Vol. II. Ithaca NY: Cornell University Press. p. 590.
ISBN978-0-8014-8721-7.
^Herkert, J. R., D. E. Kroodsma, and J. P. Gibbs (2021). Grass Wren (Cistothorus platensis), version 1.1. In Birds of the World. Cornell Lab of Ornithology, Ithaca, NY, USA.
https://doi.org/10.2173/bow.sedwre.01.1 retrieved September 9, 2021
^McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010). Field Guide to the Birds of Colombia. ProAves. p. 182.
ISBN978-0-9827615-0-2.
^
abvan Perlo, Ber (2009). A Field Guide to the Birds of Brazil. Oxford University Press. p. 344.
ISBN978-0-19-530155-7.
Kroodsma, D.; Brewer, D. (2017). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Grass Wren (Cistothorus platensis)". Handbook of the Birds of the World Alive. Lynx Edicions. Retrieved 31 December 2017.
Kroodsma, Donald E.; Sánchez, Julio; Stemple, David W.; Goodwin, Elijah; Silva, Maria Luisa da; Vielliard, Jacques M.E. (1999). "Sedentary life style of Neotropical sedge wrens promotes song imitation". Animal Behaviour. 57 (4): 855–863.
doi:
10.1006/anbe.1998.1036.
PMID10202093.
S2CID32688973.