On the morning of 20 September 1981 Rolf Koford and I saw a Palm Warbler (Dendroica palmarum) in the tiny desert town of Atomic City, Bingham County, southeast Idaho. It was first discovered in a yard, feeding on the ground and in some small bushes. We watched the bird for 2 minutes through binoculars at a distance of about 15 m, before it flew off with a flock of Yellow-rumped Warblers (Dendroica coronata). Later the same morning we relocated a Palm Warbler, very likely the same bird, in another yard where it was also seen by Mark Reynolds.