Great Thrush
Turdus fuscater
Adults are 28 to 33 cm (11 to 13 in) in length and weigh 128 to 175 g (4.5 to 6.2 oz), averaging 141 g (5.0 oz), making the species the largest member of the wide-ranging Turdus genus, and one of the largest thrushes although the Amami thrush may match or exceed it in size. It can be easily identified by its yellowish-orange beak and legs and yellow ring around the eye. Slight sexual dimorphism is sometimes present, with males having more strongly coloured legs and eye rings. Tail feathers are long. The plumage is black-brown, darker on wings and tail and pale on the belly.
ID text from Wikipedia, CC BY-SA 4.0
Rufous-bellied Thrush
Turdus rufiventris
This species is named after its distinctive reddish-orange underparts. Rufous-bellied thrushes can reach a length of 25 cm and weigh up to 68 g (male) or 78 g (female), though weights of about 59 g for males and 64 g for females are more usual. Contrary to what one might expect from the rather marked weight difference, the females are not larger, only plumper; their tarsus is actually a bit shorter than that of males on average.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in BeakBrain
Photo and call practice, free in any browser.
Play BeakBrainPhotos and recordings are credited to their authors under the licence shown. Full profiles: Great Thrush and Rufous-bellied Thrush.