The Tibetan blackbird (Turdus maximus) is a species of bird in the thrush family Turdidae. It is found in the Himalayas from northern Pakistan to southeastern Tibet. Originally described as a separate species by Henry Seebohm in 1881, it was then considered a subspecies of the common blackbird until 2008, when phylogenetic evidence revealed that it was only distantly related to the latter species. It is a relatively large thrush, having an overall length of 23–28 cm. Males are blackish-brown all over with darker plumage on the head, breast, wings and tail and dull orange-yellow bills, while females have browner underparts, faint streaking on the throat, and a dull darkish yellow bill. Both sexes may seem slightly hooded. It can be differentiated from the common blackbird by its complete lack of an eye-ring and reduced song.
Males are brownish-black all over and darker on the head, breast, wings and tail, with dull orange-yellow bills. Females have blackish-brown upperparts and browner underparts, with faint streaking on the throat and a dull darkish yellow bill. Both sexes may appear slightly hooded. Juveniles are like females, but have greyish-buff on the back to wing-coverts and rump, greyish-buff streaking on the throat, and greyish-buff barring on the belly to vent. It differs from the common blackbird in its complete lack of an eye-ring and reduced song.