There were 8 of these (only 3 photographed) in the northeast quadrant of Jackson Reservoir, feeding in moist mud. These normally are very rare in Colorado (only in fall migration), with some years having no reports. This year has been exceptional. The only similar species that is common in Colorado is Baird's Sandpiper (see photo below) which has shorter black legs and less buff on underparts. Mountain Plover (see photo below) in fall is similar (shorter bill, plain upperparts). Similar species that are accidental in Colorado would also include juvenile Ruff (larger, black eyeline) and juvenile Sharp-tailed Sandpiper (short legs, white eyebrow, rufous cap and upperparts), both of which also have yellow legs and buff head and breast.