rattle

…black tail ending in a rattle. Adult length averages 0.9 meter (3 feet), though older males may exceed 1.2 meters (4 feet) in length. Coloration is greenish gray, gray, or yellow, with a body pattern of dark irregular bands, some of which widen above into diamond-shaped blotches with yellow centers.…

…tail blunt, ending in a rattle. Small scales cover the head, and the eyes have vertically slit pupils. Body coloration may be golden yellow, grayish olive, or brown; some snakes are entirely black. The head usually has no markings; however, the heads of some individuals may be accented by a…