Sunday, March 27th, 2016 at Corp Woods, Galveston, Texas, US. This is migratory range.
This was not a slam-dunk ID for me but my first impression was Louisiana and I think all the clues add up to eliminate Northern. I cloned out a lot of distracting verbiage on the photo below so I hope it isn’t too obvious.
And a Palm Warbler, same location.
And a Flutterby on some wild Lantana. Monarch, right?