Do not kill these fine snakes when you find them. They are not Copperheads and they certainly are not Coral Snakes.
They come in many different color morphs, sometimes rings and sometimes splotches so they can be confusing.
They seem to like forest edges and will hang out in old barns, garages, and buildings. The last two I've seen in Massachusetts had been hiding under old piles of boards outside the barn abd the garage. They are mainly nocturnal hunters.
I always wonder how snakes find their mates in the Spring.