Egg Thief?

This afternoon I went out to the hen house to pick up eggs. There were only 3 eggs in the nesting box... and a big "egg-y" mess - with no broken eggshells in sight! Makes we wonder if a snake might have had a feast that day. On Sunday afternoon I did see this nice black snake making his way up the back steps. I like having black snakes around. They eat rodents and other non-desirables. But don't mess with my eggs!