Ironically, there was an AUDUBON'S WARBLER reported for Harris Neck NWR (MCINTOSH) on 11/24/1999 (see Oriole 62:21). Maybe yours is a descendant of that one!!
I notice that Brunswick (GLYNN) had one too on 2/17/1936 for another coastal record.
FYI, I happened to that same species a few years ago at my birdbath here in Waycross (WARE). Right now, don't recall the date. Anyway, I had seen them regularly when I worked out west in the Rockies for several summer seasons now a good while back. It sure was a surprise to see one turn up at my home!!
Sincerely, Sheila Willis Native American-Naturalist Talks & Tours Okefenokee Bird Club Waycross, WARE, GA