Yellow-rumped Warbler

How nice of you both to comment on this! These mysteries are always interesting! It is always nice for me to learn more! Thank you!

I think I'm going to go ahead and agree with imm/female blackburnian warbler. This one really threw me off though, but that is the best match I can come up with!

Thank you for commenting. I've put up a cropped picture too.

I'm going to take a wild stab at a guess and say.... an immature female Blackburnian Warbler? (Ducking head and running for cover....)