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
White-naped Brushfinch
Atlapetes albinucha
The white-naped brushfinch is 17 to 21 cm (6.7 to 8.3 in) long and weighs 31 to 37 g (1.1 to 1.3 oz). The sexes have the same plumage. Adults of the nominate subspecies have a mostly black head with a wide white stripe in the middle of the crown that continues onto the nape. Their upperparts, wings, and tail are dark slaty gray with a slight olive tinge. Their throat and underparts are yellow with a dusky yellowish gray wash on the flanks. Juveniles have a medium sooty brown head and dark sooty brown upperparts, dark streaks on the breast, and a brownish cinnamon wash on the flanks. Voice: The white-naped brushfinch's song is "a series of high-pitched notes and trills: tseee'up-tseee'ew-ti'ti'ti'ti'ti'ti'ti....
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: Slaty Brushfinch and White-naped Brushfinch.