Are all snakes in Arizona poisonous?
No. Of the 52 species of snakes listed in A Field Guide to Amphibians and Reptiles in Arizona, only 14 (27%) are considered venomous and a danger to humans. This includes 13 species of rattlesnakes and one coral snake. There are several species of snakes that look somewhat like rattlesnakes and others that look like coral snakes. Some other species of snakes are poisonous, but have smaller teeth and need to chew in order to inject their venom, and are generally considered not venomous to humans.
