Thomas, I'm viewing this on an uncalibrated monitor so I'm not too keen on giving my opinion on the lighting but it appears to be a little dark to me. I do really like your point of focus on the flower and the bee and you did great capturing such a quick insect at 1/400th!
Did you think about adding fill flash at all or did you do anything in pp to bring up the dark green BG at all?
I like the position, sharpness and how good the flower looks !!! I usually get the bug but trouble with the plant !!! Love seeing them in flight !!! Awesome !!!!