Townsend's Solitaire?

I spotted this bird in a pine along Battle Creek 5 miles west of Hermosa today. I don't recall seeing one like this before, although its call (kind of a single-note bell sound) seemed familiar. If it is a Townsend's Solitaire female (Audubon pix), it is at the eastern edge of its normal range. Anybody disagree with the ident?

Note: The shadow of a branch makes a black bar across the underside of its tail in a few of the pix.