It is interesting what you see in a photograph and try to reproduce.

To me, in the photo, the lower butterfly is a combination of the colors of butterfly, with back lighting, from the green hues of the diffused light.

You copied the colors, i would have adapted the colors from the photo, to lighting neutral, to black background light. And then, the butterfly would have been much darker. And shifted closer to dark and light.

And then i would have noticed that the butterfly became the background. And then i would add some kind of, in photography terms, a diffused backlight. (which in my mind is white, and so changes all the colors of the butterfly.

But that is my... computerized thinking about painting.

If i had a choice between this finished piece and the white outlines on black, (at an art show) i do not know which i would pick. They both had very good qualities. And, in the end, it would depend on the room i was going to hang the picture in, which one i would decide.

I definitely feel that there is a lot that i am missing because i cannot see the sparkle. I imagine that the original has a shimmer quality like butterflies have. And thus i would be really impressed with the original in natural lighting.