Overview
The Great Basin Collared Lizard (Crotaphytus bicinctores), also celebrated as the Desert Collared Lizard, is a fierce, athletic reptile native to the sun-scorched boulder piles and basalt canyons of the American Great Basin. Instantly recognized by its broad, massive bulldog-like head and two bold, jet-black collars ringing its neck, this apex desert lizard is famous for sprinting on its hind legs at breathtaking speeds like a miniature bipedal dinosaur.
Biology and Physical Characteristics
Crotaphytus bicinctores possesses a robust, muscular body with long, powerful hind legs and an exceptionally long, laterally compressed tail. Males display striking coloration: a tan to olive-brown back speckled with white and yellow dots, a bright orange-yellow wash over the chest and throat, and two prominent black collar bands separated by a white stripe. Gravid females develop brilliant bright orange or crimson flank spots.
Behavior and Ecology
An aggressive, visual apex predator of the rocks, the Great Basin Collared Lizard perches atop prominent lookout boulders to scan for prey and rival males. When hunting or chased, it can accelerate explosively, lifting its front legs entirely off the ground and sprinting bipedally across rocky terrain on its hind legs. Its powerful jaws deliver crushing bites that allow it to subdue large armored beetles and even other lizards.
Conservation and Human Impact
Classified as Least Concern by the IUCN, Crotaphytus bicinctores maintains healthy, stable populations across protected public lands throughout the desert West. Its reliance on rocky basalt outcrops and arid canyons naturally insulates it from widespread human disturbance.
Interesting Factoid
When sprinting at top speed across desert rocks, the Great Basin Collared Lizard lifts its front legs off the ground and runs entirely on its two hind legs like a miniature Velociraptor, using its long tail to balance like a tightrope walker.