Rufous Wren
Cinnycerthia unirufa
The rufous wren has a length of about 16.5 cm (6.5 in). Birds in most of Colombia and in Ecuador are a uniform dark chestnut-brown colour with slight blackish barring on the wings and tail, though this is difficult to observe in the field. The lores are also blackish. Individuals in northeastern Colombia and in Venezuela are a slightly paler shade, especially on the crown. The rufous wren could be confused with the sepia-brown wren (Cinnycerthia olivascens), but that species is less rufous and has bolder barring on wings and tail.
ID text from Wikipedia, CC BY-SA 4.0
Sepia-brown Wren
Cinnycerthia olivascens
The sepia-brown wren is 16 cm (6.3 in) long; males weigh an average of 25.9 g (0.91 oz) and females weigh an average of 23 g (0.81 oz). Both subspecies are shades of brown. The nominate adult has a grayish brown crown, reddish brown back and rump, and a chesnut tail with blackish bars. It has a variable amount of white on its face. Its chin and throat are pale grayish brown darkening to dark reddish brown on the belly and vent. C. o. bogotensis is much darker overall and has no white on the face. Immatures are like the adults but with a grayish face. Voice: The sepia-brown wren's song is "complex and variable, a series of musical phrases with changing stress" . Its call is "a soft, low 'wurt'" .
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Rufous Wren and Sepia-brown Wren.