Grey wren
{{Short description|Species of bird}}
{{Use American English|date=June 2021}}
{{speciesbox
| name = Grey wren
| image = Cantorchilus griseus 108727526 (cropped).jpg
| status = LC
| status_system = IUCN3.1
| genus = Cantorchilus
| species = griseus
| authority = (Todd, 1925)
| synonyms = Thryothorus griseus, Odontorchilus olallaeRemsen, 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 23 May 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved May 24, 2021
| range_map = Cantorchilus griseus map.svg
}}
The grey wren (Cantorchilus griseus) is a species of bird in the family Troglodytidae. It is endemic to the southwestern part of Amazonas state in Brazil. This small, poorly known wren somewhat resembles a house wren, but its upperparts are gray.
Taxonomy and systematics
The grey wren, with many other Cantorchilus wrens, was originally included in genus Thryothorus, but that genus was determined to be paraphyletic. There are suggestions that the species may warrant its own genus because it is quite different from the rest of genus Cantorchilus.Kroodsma, D. E. and D. Brewer (2020). Gray Wren (Cantorchilus griseus), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.grywre1.01 retrieved June 7, 2021
Description
The grey wren is {{convert|11.5|cm|in|abbr=on}} long. The adults have a lead-gray crown and upperparts; the tail is also gray with broad blackish bars. It has a faint whitish supercilium and the rest of the face is gray. The throat is whitish gray, the chest gray, and the belly a slightly buffy gray. It differs from others of its genus in its smaller overall size, its shorter tail, the gray plumage, and the absence of prominent facial markings.
Distribution and habitat
The grey wren is known only from a small area of Brazil, along the right bank of the Rio Javarí and the upper reaches of the Rio Juruá and Rio Purus to the southeast. The Rio Javari forms the border with Peru but the species is unknown on that side (the left bank) of the river. It is a bird of thick vegetation, inhabiting overgrown clearings and the undergrowth of várzea forest. In elevation it ranges only as high as {{convert|200|m|ft|abbr=on}}.
Behavior
=Feeding=
=Breeding=
No information has been published about the grey wren's breeding phenology.
=Vocalization=
Status
The IUCN has assessed the grey wren as being of Least Concern. Though it appears to be common in parts of its range, it needs much further study.