juvenile black racer?
Coluber constrictor priapus, the Southern black racer; Nassau county (16 April 2016, Nikon D7100). More information and images at http://phostracks.com.
About two feet long, light patch on chin
Coluber constrictor priapus, commonly known as the southern black racer, is one of the more common subspecies of nonvenomous Coluber constrictor snakes in the Southeastern United States. The name priapus refers to the proximal spines of the hemipenes being much enlarged into basal hooks, which is characteristic of this subspecies. These snakes are quite active during the day, which increases the chance of sightings. They will eat almost any animal they can overpower, including, rodents, frogs,...