Bicolored Wren
Campylorhynchus griseus
The bicolored wren is the largest South American wren and second in size only to the giant wren overall in the family. It is 21 to 22 cm (8.3 to 8.7 in) long and weighs 37 to 46.5 g (1.31 to 1.64 oz). The sexes are similar. The nominate adults have dark chocolate crowns and napes and their upperparts a paler chocolate. An off-white supercilium separates a dark brown stripe through the eye from the crown and the rest of the face is also white. Their tail is dark brown; all of the tail feathers except the middle pair have a white band near the end. The throat and the entire underparts are white. Voice: The male bicolored wren's song is "a series of multiple loud gurgling notes" . The female's is similar but includes a trill. The songs vary widely across the species' range. Its calls are "mostly harsh and grating" .
ID text from Wikipedia, CC BY-SA 4.0
Rufous-backed Wren
Campylorhynchus capistratus
The adult rufous-backed wren is 17 cm (6.7 in) long and weighs 29 to 42 g (1.0 to 1.5 oz). There is some variation among the subspecies but generally they have a black crown and eyestripe separated by a white supercilium, a rufous nape, and cinnamon to chestnut upperparts streaked with black and white, especially on the rump. The wings and tail are barred with black and grayish-white. The underparts are white. Young birds have duller upperparts and buff underparts. Voice: The rufous-backed wren's songs vary somewhat among subspecies but the basic structure is "melodic, pure-tone syllables with multiple frequency changes combined into phrases." An example from Costa Rica is . One from Mexico is . Its calls have great variety even within each subspecies; examples include , , and .
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Bicolored Wren and Rufous-backed Wren.