Choco Brushfinch
Atlapetes crassus
The Choco brushfinch is 16 to 18 cm (6.3 to 7.1 in) long and weighs 29.5 to 40 g (1.0 to 1.4 oz). The sexes have the same plumage. Adults have a tawny-golden crown and nape and a black face. Their back is dark olive to dark gray and their rump and uppertail coverts are olive. Their tail is dusky blackish and their wings dusky gray with dark olive feather edges. Their throat and underparts are bright yellow with an olive wash on the sides, flanks, vent, and undertail coverts. They have a deep reddish brown iris, a long, stout black bill, and grayish or dusky black legs and feet. Voice: The Choco brushfinch's song is a "lively phrase lasting some 2‒3 seconds that is repeated (with or without variations) every few seconds...transcribed as tzit-tzit-tzit-tju-tju-tju-tju-tjrrrr or seeuwee swee swit-swit-swit". Its call is a "high-pitched short staccato tsit". The species sings mostly at dawn and the early morning, typically from a high perch.
ID text from Wikipedia, CC BY-SA 4.0
Slaty Brushfinch
Atlapetes schistaceus
The slaty brushfinch is 17 to 18 cm (6.7 to 7.1 in) long and weighs about 23 to 44 g (0.81 to 1.6 oz). The sexes have the same plumage. Adults of the nominate subspecies A. s. schistaceus have a rusty crown and nape and a mostly black face. They have a whitish spot on the lores and a long white "moustache" with a thin black stripe below it. Their upperparts are dark gray and their tail blackish. Their wings are mostly blackish with white bases on the primaries and white marginal coverts. The last shows as a white spot on the folded wing. Voice: The slaty brushfinch sings mostly at dawn, "a short tsuu, tweet-tweet". Pairs sing in duet, "poorly coordinated...high-pitched notes and trills that end with distinctive chewy-chewy-chewy or t'chew, t'chew, t'chew". When foraging it makes "thin tseet notes".
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: Choco Brushfinch and Slaty Brushfinch.