Baby, about 38 cm in length.
Located near a mountain side under a rock and bush. Rocky mountain side around 10:30AM. Temperature was warm out but cool in shade as clouds get mixing up sun exposure.
Found a baby near an area where it is common to see small mammals near a building. More shrub and dead shrub area. Moderately high temperature.
Crotalus is a genus of venomous pit vipers found only in the Americas from southern Canada to northern Argentina. The name is derived from the Greek word krotalon, which means "rattle" or "castanet", and refers to the rattle on the end of the tail which makes this group (genera Crotalus and Sistrurus) so distinctive. 32 species are currently recognized.