Blue-grey Tanager
Thraupis episcopus
The blue-gray tanager is 16–18 cm (6.3–7.1 in) long and weighs 30–40 g (1.1–1.4 oz). Adults have a light bluish head and underparts, with darker blue upperparts and a shoulder patch colored a different shade of blue. The bill is short and quite thick. Sexes are similar, but the immature is much duller in plumage. The song is a squeaky twittering, interspersed with tseee and tsuup call notes.
ID text from Wikipedia, CC BY-SA 4.0
Palm Tanager
Thraupis palmarum
Adult palm tanagers are 19 cm (7.5 in) long and weigh 36 g (1.3 oz). They are grey to dull olive-green. The flight feathers are blackish, and the long tail is blackish edged with green. A yellow wingbar shows in flight. Sexes are similar, although females may be somewhat paler.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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