Awesome color and clarity on the butterfly. You may want to think about cropping out the bottom leaf. It would be OK I suppose if it didn't have a big bit mark in it. :)
Nice use of the sky as background to bring out the colors. This might be better if more of the purple flower was shown or less of the green leaf. It has the feel of being incomplete.
Subtle framing is this images main strength. The angled flower provides a nice platform to highlight your subject. It is cropped perfectly. I like the way that the buttlerfly is nearly centered in the frame but does not look like it. Simple, clean, elegant.