Look at the size of this moth -it's 11 inches across! This is the Atlas moth, the largest moth species in the world. The wings have transparent "windows" that are not holes, but translucent tissue. See many more pictures of this gorgeous moth at Environmental Graffiti. Link
(Image credit: Flickr user fabianfred)
I made a Picture of an Atlas Moth myself, and I think its awesome enough to show it:
http://imageshack.us/photo/my-images/39/dsc00189ld.jpg/
Made in the Zoo "Wilhelma" in Stuttgart, Germany.
Greetings
Michael F