a late reply to an old message, but still valid I think:
Indeed, the butterfly was too dark. In the past, I wantet to put my photos just as taken, but very often they are a little too dark, so currently I at least give some more brightness.
I use rawshooter for this, which makes it very easy to do, and saves the changes in a separate file, without changing the original picture. But I don't know if Rawshooter works for other formats than Nicon.
Thanks for the comment.