actually. no - those are just marks from leaning up against a plastic lawn chair. The chair has been out in the sun for a couple of years, and is kind of oxidized - leaves marks on everything, but they do wipe off.
This shot was taken kneeling (in the typical position). I have been waiting to see the first ground hog, and to be honest, this deal was SO fast, that it was a bit anti-climatic ;-)