Smooth black upper parts, dark gray lower parts, white lips.
Seen in Lower Frick Park Parking lot.
Just managed to snag the lower portion of it on camera and I didn't realize
Coluber constrictor is a species of nonvenomous, colubrid snake, endemic to North America and Central America. Eleven subspecies, including the nominotypical subspecies, are recognized, which as a group are commonly referred to as the eastern racers.