However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing, kidney problems (such as change in the amount of urine). This is not a complete list of possible side effects.
They are more active when it is cooler, but they can and do come out of hiding at any time of the day. Here in the desert, Arizona Rattlesnakes can easily overheat and die if they cannot find a cool place to keep themselves cool.
Mohave Rattlesnake- This snake is found across most of western and southern Arizona, It occurs in Sonoran, Mohave, and Chihuahuan desert scrubs and Semi desert grassland. In a few Arizona localities it enters the lower reaches of Plains and Great Basin Grassland communities.