Whoa! I happened to look out the window while I was working at home and noticed an unusual bird out there. My thought was "huh, that's like a Wilson’s warbler crossed with a yellow-breasted chat!" 😆 My wife and I hurriedly looked through our books and think it must be a Kentucky warbler, but way out of zone. And it seems nobody’s reported one from Tucson area in years on iNat or ebird, certainly not in dry central Tucson! Our tiny yard continues to deliver.
It was mostly bouncing around on the ground or in low branches of mesquite or prickly pears, sometimes moved up higher in the mesquite branches. So behavior that seems pretty appropriate for a Geothlypis. We watched it for a few minutes in our yard, then it flew over the neighbor’s roof and when I walked around the block I couldn’t re-locate it.
Edit: he continued the next day: https://www.inaturalist.org/observations/163187696