Crotalus oreganus helleri
San Diego Co., California. March 30, 2012.
The first helleri from my first trip to southern California and Baja Norte. This is most common rattlesnake in San Diego County. Highly toxic, irascible, and often likely to strike from cover without warning. Wicked cool, accent on wicked.
My Flickr album California 2012 is here.
HerpMapper records for this species are here.