I live in Sahuarita, AZ which is about 30 miles SW of Tucson. In the desert!!
Rattlers...more rattlers....oh yea...and a few more rattlers! Please don't ask me the type as I have no idea...don't get that close.
I have also seen some king snakes around. And though these are not snakes I have seen....
Trantulas
centipedes
Gila Monsters
scorpions
and of course coyotes and the other day we had a bobcat in the back yard. Good times.....