The tawny grassbird (Cincloramphus timoriensis) is a large songbird that is a member of the family Locustellidae commonly found in grassland and reedbed habitats. It is streaked above and has a distinctive rich brown cap. Its underside is paler and it has a long graduated tail. They call often with "loud, grumpy churring calls and a longer call that starts tick-tick-tick-tick and ends with an explosive descending trill".

The tawny grassbird has 10 identified sub-species found in Australia, Indonesia, Papua New Guinea and the Philippines.

The tawny grassbird is a medium sized grassbird with a wingspan of 56-69mm, a stout bill 14-17mmand weighs around 13-25g. The bird has an unstreaked rufous (rich brown) cap, obvious rufous fringes to flight feathers on the folded wing and wholly unstreaked underparts. It also has a long drooping tail and rufous rump. The male has a varied song given in both display flights and from exposed perches. The males sing mostly in spring and summer.

The tawny grassbird is distinguished from the related little grassbird by its larger size, stouter bill, more rufous plumage and longer tail.