Chilean Mockingbird
Mimus thenca
The Chilean mockingbird is 28 to 29 cm (11.0 to 11.4 in) long and weighs 66 g (2.3 oz). The male is somewhat larger than the female. Adults have a wide whitish supercilium. Their crown, neck, and back are brownish gray with darker streaks and their rump browner. The wings and tail are blackish. The wings show two narrow bars when folded. The outermost tail feathers have white edges and most of the others have white tips. The throat is whitish, the chest brownish gray, the belly dirty white, and the flanks buffy with blackish streaks. Voice: The Chilean mockingbird sings year round, "a series of sweet, variable notes and phrases". It is an "excellent mimic of other bird species".
ID text from Wikipedia, CC BY-SA 4.0
Long-tailed Mockingbird
Mimus longicaudatus
The long-tailed mockingbird is 27 to 29.5 cm (10.6 to 11.6 in) long and weighs 54 to 79 g (1.9 to 2.8 oz) with an average of 66.6 g (2.35 oz). Males are slightly larger than females. Adults of the nominate subspecies have a broad white supercilium and a black stripe through the eye that touches a black patch on the white cheek. Their crown and upperparts are brownish gray with darker streaks. The wings and long tail are mostly dusky brown, with patches of white that show conspicuously in flight. The throat, belly, and vent area are white and the breast and flanks buff to dull brown. Voice: The long-tailed mockingbird's song is "a fairly slow-paced series of variable rich whistled notes, churrs, rattles, squawks, and other noises, often with phrases repeated. Its calls are a throaty "garr!" and rapsing "gaawrr". It is not known to mimic other birds.
ID text from Wikipedia, CC BY-SA 4.0

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