No documented deaths have been caused by ridge-nosed rattlesnakes, but pain and discomfort can still result from a rare bite.

The Arizona ridge-nosed rattlesnake is the state reptile of Arizona.

An example study is for snakes, the Animas ridge-nosed rattlesnake, Crotalus willardi obscurus.

Taxonomy of the New Mexican Ridge-nosed Rattlesnake at Virginia Tech.

Crotalus willardi obscurus, "Animas ridge-nosed rattlesnake"

In common names, Arizona and Texas were represented by the Arizona ridge-nosed rattlesnake and Texas horned lizard.

Common names: Animas ridge-nosed rattlesnake, New Mexican ridge-nosed rattlesnake.

Common names: ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler Crotalus willardi is a venomous pit viper species found in the southwestern United States and Mexico.

Although four of the five subspecies are secure, the New Mexico ridge-nosed rattlesnake (C. w. obscurus) is an endangered species and listed as threatened by the US Fish and Wildlife Service.

Mr. Smith is an amateur herpetologist with big plans for this slick, full-color magazine stuffed with razor-sharp images of snake-necked turtles, legless lizards, giant hornets and the seldom seen ridge-nosed rattlesnake and articles with headlines like "The Joy of Toads" and "Along Came a Spider."

Common names: ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler Crotalus willardi is a venomous pit viper species found in the southwestern United States and Mexico.

Common names: ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler Crotalus willardi is a venomous pit viper species found in the southwestern United States and Mexico.