Andean Slaty Thrush
Turdus nigriceps
The Andean slaty thrush is 18 to 23.5 cm (7.1 to 9.3 in) long and weighs 50 to 67.5 g (1.8 to 2.4 oz). The species is sexually dimorphic. Adult males have a mostly slate-gray head with a pale eye-ring and a dark-streaked white throat. Their upperparts, wings, and tail are slate-gray. Their underparts are a slightly paler slate-gray; birds in the north of their range have darker underparts than those in the south. Adult females have a greenish brown head and upperparts and somewhat paler greenish brown underparts. Both sexes have a dark iris, a yellow bill, and yellow legs and feet. Voice: The Andean slaty thrush sings only in the austral summer breeding season. Its song is usually given from a hidden perch and is a ventriloquial "series of rather high, jumbled phrases, some notes high-pitched, rapid, shrill and burry but followed by long pause, tji tjihe tjie tjihe or swidrielipik tillie.
ID text from Wikipedia, CC BY-SA 4.0

Forest Thrush
Turdus lherminieri
The forest thrush is 25 to 30 cm (9.8 to 12 in) long and weighs about 100 g (3.5 oz). The sexes have the same plumage. Adults of the nominate subspecies T. l. lherminieri have a mostly warm brown head with thin white lines on the cheeks and ear coverts and a wide yellow eye-ring. Their upperparts, wings, and tail are also warm brown. Their underparts are whitish with buff-edged dark brown scallops. They have a yellow iris, bill, and legs and feet. Voice: The forest thrush usually sings from a hidden perch. Its song is "oft, musical, clear notes". Its calls include a "sharp chuk or chuk-chuk".
ID text from Wikipedia, CC BY-SA 4.0

Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Andean Slaty Thrush and Forest Thrush.