Prairie Kingsnake
Lampropeltis calligaster

Size:  2 1/2 - 3 1/2 ft
Distribution
Statewide except for the western part of the panhandle.  The prairie kingsnake, like other kingsnakes, will eat other reptiles, but usually preys on rodents.  Oklahoma is home to two color varieties, blotched and striped.  The one in the picture above is blotched, but with faint striping.