Mike Cain had a photo the other day on his blog and I took a photo of one on my kitchen window a few minutes ago:
(http://www.vtgrandpa.com/photos/albums/forum_photos/dcp_8062.sized.jpg)
If you would like a little more information, below is a link and also a better photo than I was able to get - Apparently is one of those caterpiller transformation insects:
http://www.fcps.edu/islandcreekes/ecology/luna_moth.htm (http://www.fcps.edu/islandcreekes/ecology/luna_moth.htm)