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.
Some 64 different rattlesnake varieties (species and subspecies) are generally recognized, of which about 30 occur in the United States. Arizona has the most diverse, stateside assemblage with 17. By comparison, Nevadaâs six seem a rather scant array. These snakes are born alive and may live as long as twenty years.