It's an Acronita aceris or Sycamore Moth. From what I can find the moth is actually quite bland looking. Just do a search for it and you will find a couple of sites with decent pictures. Gene
Thank you Bunkyx ! I found many pictures of Acronicta aceris on Google Images http://images.google.fr/images?svnu...m=1&ct=result&cd=1&q=Acronicta+aceris&spell=1