title: Western rattlesnake
text: Western rattlesnake may refer to:
  
   Crotalus oreganus, a venomous pitviper species found in North America in the western United States, parts of British Columbia and northwestern Mexico
   Crotalus viridis, a.k.a. the prairie rattlesnake, a venomous pitviper species native to the western United States, southern Alberta, Canada, and northern Mexico