The Dusky Robin is an olive-brown bird, with an indistinct white wing-bar. The underbody is mostly light grey-brown. There is a slight dark eyeline and a whitish mark at the bend of the wing. It has a short, slender bill and moderately long, square-shaped tail. Juveniles are darker brown above, streaked paler above, and mottled below. Dusky Robins are usually seen as singles or pairs, but do come together in small winter flocks.