Andrea, that’s a fine question….My past Xmas Bird Count(s) when living and teaching in the Midwest rarely included detections of wood-warblers…but, if so, it was typically Yellow-rumped Warbler (Myrtle subspecies, Setophaga coronata coronata).

More rare in s. WI, I’ve seen people list Common Yellowthroat and Palm Warblers.

Here in N. CA in the SF Bay Area where I have lived for 25+ years, my Xmas Bird Counts sometimes yield the auduboni subspecies of the Yellow-rumped (with rare to periodic Myrtle subspecies)…..Common Yellowthroat (resident here)…..and rarely: Black-throated Gray and Wilson’s….Even more rarely: Nashville, Hermit, and Yellow.

I hope this helps? Now it’s off for more gulling later today at Shollenberger Park in Petaluma — a fine venue for seeing rare Laridae/gull family member species…but, oops, this blog is supposed to be wood-warbler-centric. Sorry. 

Happy Holidays! Daniel

(with my “Birding Tours” information noted elsewhere in my web site, WarblerWatch.com)