Going back to the picture...
I think it is a great photo for sure, but it's not a silhouette one, and for a normal one it is probably too dark. Just had a quick edit (not meant for uploading). Since you do not have any other reference, I levelled according to the wings (0.4 CCW), highlighted mid-tones 0.2 and used some shadow highlight (
), and surprise, you see again the original picture!