Black-capped Tanager
Stilpnia heinei
The black-capped tanager is approximately 13 centimetres (5 in) long, and weighs between 18 and 20 grams. The bird's iris is dark brown, while the beak and legs are black. The male of the species has a black crown, with the black extending to the lores, forehead, and upper nape. Its upper-parts are a shining silvery bluish-grey, which extends to the upper tail coverts, and contrasts sharply with the black crown. The upperwing-coverts are a duller bluish-grey, with an edging of duller blue, whereas the primary coverts are black, with a dull blue edge paler than that of the wing coverts.
ID text from Wikipedia, CC BY-SA 4.0

Burnished-buff Tanager
Stilpnia cayana
There are several subspecies of the burnished-buff tanager, falling into two main groups: the northern and western cayana group, and the southern and eastern flava group. The subspecies huberi from Marajó Island is intermediate between the two main groups. Males of the cayana group have an orange-rufous crown, black mask, and cream underparts distinctly tinged blue on the throat and chest. Males of the flava group have an orange-buff crown and buff underparts with a black patch extending from the mask, over the throat and central chest, to the mid-belly.
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: Black-capped Tanager and Burnished-buff Tanager.