I would like some help with the attached photo. My first thought is its some sort of egg case. I’ve done a lot of searching on the INTERNET and have asked a few knowledgeable friends with no luck. The photo was taken 08/25/2004 in the Charlotte North Carolina area.
You don’t have an egg case, but a caterpillar. It is a Skiff Moth, Prolimacodes badia, one of the Slug Caterpillars. There are several color variations of the caterpillar, but this site has a photo that closely resembles yours. The caterpillars which can be found from July through October feed on cherries, oaks, and many other woody plants.