Mountain Wren
Troglodytes solstitialis
The mountain wren is 10.5 to 11.5 cm (4.1 to 4.5 in) long and has a mean weight of 11.8 g (0.42 oz). The adult of the nominate subspecies has a rufous brown forehead and crown, a less reddish brown nape, shoulders, back, and rump, and a rufous brown tail with narrow black bars. The folded wings also appear barred. It has a buffy brown supercilium with a darker brown line behind the eye and warm buff cheeks. The throat and chest are also warm buff, the belly a paler buff, the flanks buffy brown with darker bars, and the vent grayish, also with darker bars. Voice: The mountain wren's song is quiet, "a series of high notes, 'treee-treeee-tititiki'". Its calls are repetitive "'dzz' or 'di-di'".
ID text from Wikipedia, CC BY-SA 4.0

Rufous-browed Wren
Troglodytes rufociliatus
The rufous-browed wren is 10 to 11.5 cm (3.9 to 4.5 in) long and weighs 11 g (0.39 oz). The adults of both sexes of the nominate subspecies have a dark brown crown, back, and rump and a warm brown tail. Their back and tail have dark bars. They have a pale buff supercilium and darker brown cheeks. Their chin is buffy and their throat and chest yellowish buff that is darker on the sides. The lower belly and vent area are barred. Compared to the nominate, T. r. chiapensis is darker above with a rufous cast to the throat and a white belly, T. r. Voice: The rufous-browed wren's song is "a varied, scratchy warble running into tinkling trill" and its call "a loud nasal 'zhweet'".
ID text from Wikipedia, CC BY-SA 4.0
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Mountain Wren and Rufous-browed Wren.