Two of my favorite operas, Ravel's L'enfant et les sortilèges and Janáček's Cunning Little Vixen, are set in the animal world and the music is amazingly mystical and magical. I was trying to think of other operas that deal with animals that capture that same sort of mystical musical quality. I couldn't think of any others in the standard repertory, but maybe I am missing some obvious ones? Probably there are operas by unsung composers that I am not familiar with! Can anybody think of any?