Chaco Earthcreeper
Tarphonomus certhioides
The Chaco earthcreeper is about 16 cm (6.3 in) long and weighs 18 to 31 g (0.63 to 1.09 oz). It is a small earthcreeper with a long and very slightly decurved bill. The sexes' plumages are alike. Adults of the nominate subspecies have an indistinct orange-rufous supercilium on a mostly dark brown face. Their forehead is dull orange-rufous, their crown and back dull dark brown, and their rump and uppertail coverts somewhat rufescent brown. Their tail is generally dull brown with progressively more rufous from the central to the outermost feathers. Voice: The Chaco earthcreeper's song is "a series of 5–15 loud, squeaky penetrating 'chiqui' notes that increase in intensity descend in pitch". Its call is "a loud whistled 'tééoo' or 'tuéét' ".
ID text from Wikipedia, CC BY-SA 4.0
Cinnamon-throated Woodcreeper
Dendrexetastes rufigula
The cinnamon-throated woodcreeper is one of the larger woodcreepers, with a heavy body, short wings, and a short, stout, bill with a slightly hooked tip. It is 22.5 to 27 cm (8.9 to 11 in) long. Males weigh 64 to 74 g (2.3 to 2.6 oz) and females 66 to 77 g (2.3 to 2.7 oz). The sexes are alike. The nominate subspecies D. r. rufigula has mostly medium brown upperparts with a paler crown and rufous-chestnut wings, rump, and tail. A few whitish streaks span the nape and upper back. It is generally paler and more cinnamon-brown below. Voice: The cinnamon-throated woodcreeper sings mostly at dawn and dusk. One author describes the song as "a fast series of loud rattled notes, ascending at first and descending and trailing off at the end". It "always ends with a distinctive lower-pitched 'tchew' or 'trreew' note". Another describes it as a "very high loud series of ringing notes, sounding almost like a trill."
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: Chaco Earthcreeper and Cinnamon-throated Woodcreeper.