It's not supposed to be a mounted butterfly, it's some sort of overlaid graphic of the idea of a computer box with butterfly wings.

I think the intended reference is http://emilydamstra.com/news/please-enough-dead-butterflies/ (because of the wing positioning).

THANK YOU, that was enlightening.

But speaking of peeves: that article of plain-text with static images doesn't render without JavaScript damnit.