It is made with fabric, using a kanzashi fold. The larger wings are simply a larger square of fabric. Then you put a string through the wings at the bottom (order: small, lg, lg, small) the same way you would a kanzashi flower petal and they gather together to make the shape of the butterfly. I hot glued on a piece of black cording I had that is kind-of flat and put a hanging string through the back of one of the large wings.
I know I hung it on a pineapple plant...I do like to put my Christmas tree up early....but even I can't do it this early!