The northern black racer (Coluber constrictor constrictor) is a long slender 36- to 72-inch black snake with a white chin that inhabits a wide variety of early successional habitats. It occurs at the northern edge of its range in southern Maine, central New Hampshire, and southern New York. Threats include development of upland habitat, habitat loss and mortality from sand and gravel mining, mortality from vehicles on roadways and utility rights-of-way, human persecution, den compaction from equipment, and habitat succession from grass and shrublands to forests.