A fine shot the crop is tight but it works. I don't mind the OOF flowers but might give consideration to removing those on the left (I think it would depend which day it is!). Super details in the butterfly. I am wondering if the greens are a tad strong - maybe the yellow end and possibly there is a cast on the butterfly? It may be worthwhile applying the white dropper tool on the butterfly in the raw conversion - see what you think.
If these are like the white butterflies I see, they are hard to catch. Agree with Jon, I'd love to see a looser composition. Cloning is fair. There is a bit of cyan on the butterfly but it may be natural, in the light. I always enjoy a touch of color, no matter how it got there.
Hi Stuart. The pose, sharpness, and exposure are all first rate! I would agree with cloning the OOF flower in the ULC and you might consider adding a little canvas on the left - it would be easy to do with this smooth background. Very nicely done!