Not sure of species, but if it were in MY barn it would be a DEAD snake!!
I don't mind the non poisenous ones but the DW hates them all!! The problem with snakes are when they are in my loft, the mice are outside and when the mice are inside the snake is outside hibernating in the ground. Not a very effective mouse controller.
aaaaaaaaaaaaaaaaaaaaaaaaaawwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww .. I would not have been able to take a pic of that, I would have run so fast there would have been a smoke trail......