Snake Skin

Peg found this snake skin the other morning in the yard.  I am pretty sure it is not the skin of a poisonous snake.  I could be wrong but the shape of the head is that of a "friendly" snake.  The grand kids manhandled it prior to its picture being shot so I can't be completely certain.

I'm calling it a rat snake skin.  One reason we've had no mice in the house is these snakes are patrolling the yard on a regular basis.