crossing a road in the Big Burro Mountains. This animal was ~4 feet and had a bulge from a recent meal. Observed ~1330 hrs on an overcast day.
Curled on road cut at about 11pm, right before a rain storm.
Crotalus molossus is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here.