Emerald Tanager
Tangara florida
The emerald tanager is a medium-sized tanager with a length of 10.6–13 cm (4.2–5.1 in) and a mass of 18–20.5 g (0.63–0.72 oz). Both sexes are similar in appearance, but the species shows slight sexual dimorphism, with females being duller and having yellow-green instead of yellow on the head. It may be confused with the glistening-green tanager but can be told apart by its less intense plumage. It is also similar to the blue-whiskered tanager but can be distinguished by the latter's black face and throat and turquoise cheeks. Voice: The emerald tanager makes a sharp chip or tsip which may be repeated and which occasionally accelerates into a rapid twitter. Its song is a series of loud cheet or chiip notes.
ID text from Wikipedia, CC BY-SA 4.0

Red-necked Tanager
Tangara cyanocephala
It is mostly green with a black back and a blue head and throat. Plumage is described as "brilliant and varied, including areas of bright red, bright green, blue, and black." They can be observed in mixed-species flocks along with green-headed tanagers.
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: Emerald Tanager and Red-necked Tanager.