Ruby-crowned Tanager
Tachyphonus coronatus
The ruby-crowned tanager is a small bird, 16 centimetres (10 in) long, weighing 26–33 grams (0.92–1.16 oz). Males are shining black with concealed red crests on the front of their head that they rarely raise, usually when excited, and white wingpits that are visible only when flying. Females are light brown, with slight black streaking under the throat and darker wings. Both sexes possess conical bills and black legs and feet.
ID text from Wikipedia, CC BY-SA 4.0
White-lined Tanager
Tachyphonus rufus
The adult white-lined tanager is 18.5 cm (7.3 in) long and weighs 33 g (1.2 oz). It has a long tail and a mostly black stout pointed bill. The adult male is glossy black, apart from white underwing coverts and a small white patch on the upperwing. These white areas are conspicuous in flight but otherwise rarely visible. Females and immatures are entirely rufous in plumage, somewhat paler below.
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: Ruby-crowned Tanager and White-lined Tanager.