Thanks for the replies, everyone! And thanks, too, for those beautiful photos; more would certainly be welcome. Oh, and that cardinal is really cool, Oniya!
Good question about why the curators were "astounded," incidentally. My own impression wasn't that the curators were astounded by the notion of gynandromorphic butterflies, however, but rather by the birth of this particular butterfly during the exhibition itself. Gynandromorphism might indeed not be unusual in butterflies -- I myself have no idea how frequent it is -- but the manager of the exhibition "has seen only two other gynandromorphs in his career," and this presumably includes the gynandromorphic moth that was born at the museum in 2008. So I can imagine how the birth of a gynandromorphic butterfly during the exhibition would prove a pleasant surprise for the curators and a boost for the exhibition itself.
Really quite paradise...