Overview
AT A GLANCE
- Common Name: Long-nosed Leopard Lizard
- Scientific Name: Gambelia wislizenii
- Category: Reptiles
- Subcategory: Lizards
- Size: 22 to 38 cm (8.7 to 15.0 in) total length including tail; snout-vent length 8 to 14 cm (3.1 to 5.5 in)
- Weight: 30 to 65 g (1.1 to 2.3 oz)
- Lifespan: 5 to 8 years in the wild
- Diet: Carnivorous/predatory; large grasshoppers, beetles, crickets, small lizards (side-blotched lizards, whiptails), and occasionally small rodents
- Habitat: Open desert scrub with scattered shrubs for shade and loose sand or gravel for sprint hunting
- Range: Arid regions of western North America, from eastern Oregon and southern Idaho south throughout the Great Basin, Mojave, Sonoran, and Chihuahuan deserts into northern Mexico
- Conservation Status: Least Concern
The Long-nosed Leopard Lizard (Gambelia wislizenii) is a large, predatory, and fierce crotaphytid lizard native to the sun-baked arid basins and sagebrush steppes of western North America. Named for the striking leopard-like spots covering its dorsal body and its elongated, pointed snout, this formidable desert hunter is famed for its predatory ferocity. Unlike most insectivorous lizards, it routinely hunts, captures, and devours other smaller lizards nearly its own size.
Ecologically, Gambelia wislizenii occupies an apex invertebrate and vertebrate predator niche within desert shrub ecosystems. Equipped with exceptional visual acuity and high-speed bipedal sprinting capabilities, it patrols open gravelly flats between creosote bushes, ambushing grasshoppers and competing lacertilians. During the spring breeding season, females undergo an extraordinary physiological transformation, developing glowing coral-red or orange spots and bars that signal reproductive receptivity.
Biology and Physical Characteristics
The morphology of Gambelia wislizenii features a robust body, a relatively large triangular head with an elongated, pointed snout, and a very long, slender round tail that measures nearly twice the head-body length. The dorsal ground color ranges from pale sandy-grey to yellowish-brown, adorned with dark brown to charcoal circular spots arranged in irregular rows, interlaced with pale whitish transverse crossbars that break up its outline against desert pebbles. Sexual dimorphism is dramatic: during the breeding season, gravid females develop brilliant crimson, orange, or coral-red spots and lateral bars along the sides of the body and underside of the tail, signaling that they are carrying eggs. The hind limbs are long and muscular, permitting sudden, explosive acceleration.
Behavior and Ecology
Diurnal and intensely thermophilic, the Long-nosed Leopard Lizard basks in the morning sun to reach operating body temperatures exceeding 38 degrees Celsius before commencing hunting. When pursuing rapid prey such as whiptail lizards or fleeing grasshoppers, it can sprint bipedally on its hind legs with its tail raised as a counterbalance, reaching speeds that easily overtake other desert fauna. When cornered or seized, it displays fierce combativeness, puffing up its throat, hissing loudly, and delivering a powerful, crushing bite with its heavy jaws. Females lay one to two clutches of 5 to 11 eggs in subterranean burrows dug in soft sand, which hatch in late summer.
Conservation and Human Impact
Currently assessed as Least Concern by the IUCN, the Long-nosed Leopard Lizard is widespread and generally stable across its extensive desert distribution. However, localized habitat degradation caused by invasive cheatgrass proliferation, which fuels destructive rangeland fires that eliminate desert shrub canopies, poses an ongoing threat. Off-road vehicle recreation and expansive renewable energy development in desert basins also fragment localized populations.
Interesting Factoid
The Long-nosed Leopard Lizard can run bipedally entirely on its two hind legs when sprinting at top speed across desert sands, using its long tail as an aerodynamic counterbalance just like a miniature velociraptor.