Austral Thrush
Turdus falcklandii
The austral thrush is 23 to 26.5 cm (9.1 to 10 in) long and weighs 95 to 113 g (3.4 to 4.0 oz). The sexes have the same plumage. Adults of the nominate subspecies have a mostly blackish brown head with a thin orange-yellow eye-ring and a buffy and blackish stippled chin and throat. Their upperparts, wings, and tail are warm brownish olive and their underparts ochre. Both sexes have a dark iris and an orange-yellow bill, legs, and feet. Juveniles have the same warm brownish olive upperparts as adults but with heavy buff streaks. Their underparts are buff-yellow with dark brown spots. Voice: Only male austral thrushes are known to sing. Individuals have a large repertoire consisting of "phrases of whistled and screeching syllables produced at a regular tempo". Older individuals tend to have more songs. The austral thrush is also an accomplished mimic and is known to imitate the songs of at least 12 species including songbirds and raptors.
ID text from Wikipedia, CC BY-SA 4.0
Creamy-bellied Thrush
Turdus amaurochalinus
The creamy-bellied thrush is 22 to 25 cm (8.7 to 9.8 in) long and weighs 52 to 73 g (1.8 to 2.6 oz). The sexes have the same plumage. Adults have a mostly olive-brown head with black lores and a brown-streaked white throat. Their upperparts, wings, and tail are the same olive-brown as the head. Their breast and flanks are usually grayish buff that becomes creamy white on the belly and undertail coverts. (Some individuals have pure gray instead of grayish buff underparts.) They have a dark iris, a yellowish bill when breeding and a darker one otherwise, and drab brown legs and feet. Voice: The creamy-bellied thrush's song is a "simple, little varied, yet musical series with short notes, like tjurre, wurr, tjeeh, and tjut-tjeé". Its calls include a "sharp pok", a "psiip in or before flight", and as a warning a "sharp kitten-like pchuo".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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