Cover Characteristics: Book Covers featuring Butterflies

So, butterflies. While not the most difficult topic, you wouldn't think butterflies would be that common on book covers, right? Right?! WRONG. SO RIDICULOUSLY WRONG. I started out well, I knew of a few off the top of my head and found some more on Amazon until I had some nice ones to choose from. But then I had this brilliant idea and was all, "I'll look through my kindle library and my TBR for...