To me it seems the head and antenae are a bit soft with the focus point being on the leaf in the foreground. A slightly smaller aperture would have helped get it all in focus and when shooting animals / insects its a good rule to make the eyes the focus point.
To improve the shot I think it would be better if you cropped it so the butterfly was off center, maybe on the left third would work best. A little saturation boost could help too.
Hope this helps, keep it up!
Nice shot. I think if you take this snap more closer that would be excellent.