Quote Originally Posted by Rustic
oh, it is just the wing.
I thought that the butterfly has both gentials. :P

how do they actually bred? I suppose it is just a mutation, right?
Yah... a freak occurrence of nature, and is something well documented in good butterfly books. The press cutting and the specimen of the Archduke gynandromorph is on display at the PBF. Do look out for it the next time you visit the place.