Warbler with gray back, slight rufous crown, yellow throat, patch at forewing, base of tail. Barred wings, slightly streaked breast, white eye ring. Two were foraging on ground, alternating with trips to low branches. These didn't seem to be moving with the mixed flocks. Thanks for ID's, inaturalist folks!
If you think this observation is inaccurate, please add an ID, participate in the quality assessment above, or describe the inaccuracy in a comment.