Yeah ive seen these guys in two surprisingly different geographic locations. First instance was along the mississippi during the flood in early 90s. Second time, was a small lake approx 60 SSW from Omaha NE.. i ended up identifying it by a book with DNR. the small lake was a popular swimming area, while the snakes generally keep to themselves unless your an a-hole to them. DNR ended up draining the lake and moving them to a safer location for humans and themselves. DNR ended up finding that someone had them as pets, and just turned them loose...