>>1962844I don't know what you were trying to do with the wings. Make them transparent or just cut them out?
I figured something like this could be done with color to alpha in Gimp so I made this, albeit rather quickly and sloppily.
If you want to do it differently, follow
>>1962641 instructions.
When you do the wings, you have to add color to the white highlights or they will end up completely gone as they are white. I used a blue but messed up the top wing a little, it isn't as transparent as the others.
If you were just trying to cut them out that's much faster to do.