Black Snake or Blue Racer, a common snake in North America, reaching a length of five or six feet, and exceedingly agile and swift. It has no poisonous fangs and therefore is comparatively harmless, though it possesses power of destroying its prey by the contraction of its folds. It is a deadly enemy of the rattlesnake, in destroying which it shows great skill. The blacksnake is usually bluish above and slate color beneath, though in the South it becomes an olive-green. Birds' eggs and small animals, like mice, frogs and birds, comprise its food.