Id of a thrush by sight is easier for me than by song/call. That's all I'm saying. The Swainson's thrush has a buffy eye-ring and buffy lore (sometimes faint, sometimes prominent) and tends to have a warmer overall colour tone than a Hermit, which has an off-white eye ring, and a rusty rump and tail. The Wood thrush has a rusty back as well and the spots are more balloon-like.