Solitary bird in grass of city square in Quebec (old) City. It seemed an unpromising site for a warbler.
No interactions present.
I am at work without books to refer to, so this suggestion is from memory (and probably wrong, therefore!).
My Flickr photos...
Thanks for that. Am no expert on American birds! Looks right. On another picture the 'pale grey neckband' is clearly visible.
Lat/Lng: 46.8109, -71.2055
Quebec old city square. Trees but no bushes in sight.