Arizona Diamondback Rattlesnake getting some sun

I came across this fellow sunning itself under the warming morning sun on my way out to the goldfields near Stanton, Arizona. I didn't want it to get run over by some other car so I encouraged it to get off the road. Definately not a happy camper as it assumed an aggressive posture and rattled loudly but eventually retreated to the safety of the scrub.

(Unfortunately it was very windy so it's hard to hear the buzzing of its rattles)