- belly and sides marked with oval-shaped spots (spots wider than long) distinctly paler than breast spots.
- cold grayish wash on flanks (this color similar to upperparts).
- Contrast between darker triangular anterior spots and pale oval posterior spots, combined with cold, grayish sides and flanks and minimal buff wash on breast highly distinctive.
Why it's not a...
Veery: Breast spotting would be less distinct and smudgier. Flanks would be brighter, and the upper parts should have at least some warm reddish tones, even on a duller western one.
Hermit Thrush: Should have at least an indistinct eye-ring, a tail and rump that contrast with the back more. In the absence of a strongly contrasting tail, I would still expect to see brighter, contrasting primaries.
Swainson's Thrush: Would have a buffy wash to the face, throat and upper breast, not to mention the typically bold eyering.
I am mostly familiar with Gray-cheeked from Alaska (and the northeast/mid-west a long time ago), but I wouldn't hesitate to ID this bird as one up there.
Greg Levandoski
Longmont, CO