Cobalt-winged Parakeet
Brotogeris cyanoptera
The cobalt-winged parakeet is 18 to 20 cm (7.1 to 7.9 in) long and weighs an average of 67 g (2.4 oz). The species is almost entirely green that is darker on its upperparts. Adults of the nominate subspecies B. c. cyanoptera have a yellowish forehead, an orange chin, and a blue tinge on their crown and nape. Their flight feathers are blue; their central tail feathers are also blue and the rest are green. Immature birds are a duller version of the adult. Subspecies B. c. gustavi has very little blue on its head and a yellow edge on the carpals. B. c. Voice: The cobalt-winged parakeet's common calls are " a high-pitched "klee", shrill "chree" or bisyllabic "chree-chree"" that are given both when perched and in flight. Another call is "a fast chattering series "chichichichichi"." Members of flocks call simultaneously and make "a shrill chattering".
ID text from Wikipedia, CC BY-SA 4.0

Orange-chinned Parakeet
Brotogeris jugularis
The orange-chinned parakeet is 18 to 19 cm (7.1 to 7.5 in) long and weighs between 53 and 65 g (1.9 and 2.3 oz). Adults of the nominate subspecies have a bright green head with a bluish wash on the crown, a white eye ring, an orange chin, and a pale bill. The chin patch is often hard to see. Their upperparts and tail are bluish green with brown wing coverts that show as "shoulders" when perched. Their underparts are mostly bright green with bluish vent and thighs. Their underwing coverts are yellow. Immature birds are similar to adults. Subspecies B. j. Voice: The orange-chinned parakeet's common calls are "a high-pitched "klee", shrill "chree" or bisyllabic "chree-chree"" that are given when perched or in flight. It also makes "a fast chattering series "cra-cra-cra-cra-cra"." It makes "a near constant, shrill, harsh chatter."
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: Cobalt-winged Parakeet and Orange-chinned Parakeet.