Crotalus

• timber rattlesnake

  Widely distributed in rugged ground of eastern United States.

• prairie rattlesnake

  Widely distributed between the Mississippi and the Rockies.

• sidewinder

  Small pale-colored desert rattlesnake of southwestern United States; body moves in an...

• Western diamondback

  Largest and most dangerous North American snake; of southwestern United States...

• rock rattlesnake

  Mountain rock dweller of Mexico and most southern parts of United States south...

• tiger rattlesnake

  Having irregularly cross-banded back; of arid foothills and canyons of southern...

• Mojave rattlesnake

  Extremely dangerous; most common in areas of scattered scrubby growth; from Mojave...

• speckled rattlesnake

  Markings vary but usually harmonize with background; of southwestern Arizona...

Also contains

• rattle

  Loosely connected horny sections at the end of a rattlesnake's tail.

• diamondback

  Large deadly rattlesnake with diamond-shaped markings.

• massasauga

  Pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice...

• massasauga

  Small pygmy rattlesnake.