Crotalus tigris is a venomous pitviper species found in the southwestern United States and northwestern Mexico. No subspecies are currently recognized. The specific name is Latin for tiger and is an allusion to many narrow dorsal crossbands that create a pattern of vertical stripes. A relatively small species with adult reaching less than 100 cm in length. The largest specimen on record measured 88.5 cm. Proportionally, the head is small and the rattle is large. The color pattern consists of a gray, lavender, blue-gray, pink or buff ground color that usually turns to pink, pale orange or cream on the sides. This is overlaid with a series of 35-52 crossbands that are dark gray or brown in color and consist mainly of heavy punctations.

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