This species is found in southeastern to west-central Arizona and in Northern Mexico.
The Sonoran whipsnake is diurnal and can be found in rocky streams, where grass, saguaro cactus, ocotillo, palo verde grow through chaparral and juniper areas. Rocky canyons, foothills and mountains with dense vegetation are part of its habitat. It feeds on birds, other snakes, frogs, lizards and small mammals. The females lay 4-13 eggs per clutch.
The Sonoran whipsnake has a length that ranges from 24-67 inches. It has a body coloration of olive, gray, greenish or gray-brown color that fades towards the tail. The body of this species has two-three light-colored stripes on each side that extend from the neck to about the mid-body before melting into the color of the background. Its belly is cream that fades to pale yellow towards its tail. Masticophis bilineatus has a broad head with large eyes and round pupils.
Learn more with Schechter Natural History's Guide to Reptiles and Amphibians