Bluish-grey Saltator
Saltator coerulescens
On average, the bluish-grey saltator is 20 cm long and weighs 52 g. The plumage depends on age and subspecies, but in general this bird has grey or greyish-olive upperparts, a white stripe over the eye, a narrow white throat, a grey breast and a buff or cinnamon belly. The common call is a long-drawn upward slur, ch'wheeet or ch'kweeee, sometimes with a more elaborate beginning, as hi'whee chu weeeeh. The song is a warble, usually fairly short, varying from nasal to mellow.
ID text from Wikipedia, CC BY-SA 4.0

Green-winged Saltator
Saltator similis
Slightly smaller than other species of the same genus, it has the same strong black beak that gave rise to the common name of these birds. As in the Saltator maximus , it has a green back, gray tail and sides of the head. The superciliary stripe is the longest of the three species (adult bird), with the "mustache" less defined and the throat all white. Underneath, gray dominates on the sides, becoming orange brown and white in the center of the belly. The wings are greenish. The juvenile does not have such a long stripe, being the same failed or nonexistent, right after leaving the nest.
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: Bluish-grey Saltator and Green-winged Saltator.