Elegant Crescentchest
Melanopareia elegans
The elegant crescentchest is 14.5 cm (5.7 in) long. Males weigh 16.0 to 20.2 g (0.56 to 0.71 oz) and females 15.5 to 19.0 g (0.55 to 0.67 oz) Males of both subspecies have a black crown, nape, and mask and a creamy supercilium. The back and rump are olive-brown. Its throat is white or pale buff that is darker around the margins and a black "bib" is below it. The upper chest is dark chestnut fading to tawny on the flanks and belly. The nominate female is similar, but the crown is sooty and there is no dark chestnut on the chest. The female M. e. Voice: The elegant crescentchest's song is "a series of..."chuck" notes" . Its scold call is "a dry penetrating churr" .
ID text from Wikipedia, CC BY-SA 4.0

Olive-crowned Crescentchest
Melanopareia maximiliani
The olive-crowned crescentchest is 15 cm (5.9 in) long. Males weigh 17.1 to 18.0 g (0.60 to 0.63 oz), one female weighed 16.7 g (0.59 oz), and unsexed specimens weighed 16.9 to 18.2 g (0.60 to 0.64 oz). The nominate subspecies' crown and upperparts are olive-brown, the throat deep buff, and the chest and belly ochraceous. It has a narrow buff supercilium with a black mask below and a black crescent and chesnut band between the throat and chest. M. m. argentina is similar but has paler underparts. M. m. Voice: The nominate olive-crowned crescentchest and M. m. argentina have two songs, one described as "chuck" notes and the other as "chi" notes . The song of M. m. pallida is faster . The species' call is described as "chit chuck" .
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: Elegant Crescentchest and Olive-crowned Crescentchest.