#genus_Crotalus__Crotalus  large rattlesnakes; seldom bite unless startled or pursuing prey
  supertype:  reptile_genus__reptilegenu  a genus of reptiles
  member of:  family_Crotalidae
  member:  timber_rattlesnake__banded_rattlesnake__Crotalus_horridus_horridus  widely distributed in rugged ground of eastern United States
  member:  prairie_rattlesnake__prairie_rattler__Western_rattlesnake__Crotalus_viridis  widely distributed between the Mississippi and the Rockies
  member:  horned_rattlesnake__sidewinder__Crotalus_cerastes  small pale-colored desert rattlesnake of southwestern United States; body moves in an S-shaped curve
  member:  Western_diamondback_rattlesnake__Western_diamondback__Crotalus_atrox  largest and most dangerous North American snake; of southwestern United States and Mexico
  member:  rock_rattlesnake__Crotalus_lepidus  mountain rock dweller of Mexico and most southern parts of United States southwest
  member:  tiger_rattlesnake__tigerrattlesnake__Crotalus_tigris  having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico
  member:  Mojave_rattlesnake__Crotalus_scutulatus  extremely dangerous; most common in areas of scattered scrubby growth; from Mojave Desert to w. Texas and into Mexico
  member:  speckled_rattlesnake__Crotalus_mitchellii  markings vary but usually harmonize with background; of sw Arizona and Baja California

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