White Milkweed (Asclepias variegata) – in the process of blooming.
Gaura … probably Gaura longiflora or “Beeblossom”. I didn’t notice that flying insect near the top until later … and I can’t be any more specific about that critter either.
Once a year or so I head up towards West Memphis to visit some folks, and always try to stop by the Wapanocca National Wildlife Refuge just north of there. (I don’t always get to – it’s sometimes closed due to flooding.) I have a photo of it in Winter that you can see in this post – and the top photo above is the same location seen in Spring, plus an extra shot that I liked. (Forgive the blown-out clouds – it was a bright afternoon and I exposed for the shadows…)