What kind of NJ pine barrens snake has black skin black tongue wraps self in a blueberry bush calm but withdraws very rapidly after a while?

Without pictures it is impossible to tell but all snakes are reclusive and will hide from a predator. No snake (save for possibly the black mamba) will chase down a predator. There are two species of black snakes in the pine barrens. The Northern Black Racer and Black Rat Snake. Both are nearly all black with white or light markings on their chin and throat. The Rat Snake is noticeably lighter in color on its underside.The Black Racer is typically a more aggressive snake than the Rat Snake but it will retreat as well when given the chance. As its name implies the Racer can move very quickly.