I took this picture while hiking in the Great Falls region of Maryland. Trudging down a pine-needle blanketed path in a thickly-wooded area I spotted this little guy resting on an old log, brilliantly displayed in a shaft of sunlight. After looking through the other moth pages, it appears that this might be a Cecropia moth? Thanks!
This is actually another of the Saturnid Moths, the Tulip-Tree Silkmoth, Callosamia angulifera. It is found in the East and Midwestern States from Canada to Florida and west to Illinois. The strong side-lighting brings out the wing texture nicely in your photo.