species 38,608 observations
Western Rattlesnake
Crotalus oreganus
Field notes
Crotalus oreganus, commonly known as the Western rattlesnake or northern Pacific rattlesnake, is a venomous pit viper species found in western North America from the Baja California Peninsula to the southern interior of British Columbia.
Read more on WikipediaRange
Greener is more native, amber more introduced; paler is less certain. How this was decided