Overview
The Coachella Valley Fringe-toed Lizard (Uma inornata) is an endangered, hyper-specialized reptile found nowhere else on Earth outside the windblown sand dune systems of the Coachella Valley in southern California. With specialized comblike scales on its toes that act like miniature snowshoes, this extraordinary creature has adapted to survive in blistering desert sands exceeding 130°F.
Biology and Physical Characteristics
Uma inornata features a flattened, aerodynamic body covered in smooth, granular scales. Its dorsal pattern is exquisitely understated, featuring fine, pale brownish network lines and dots on a pale ivory-whitish ground that matches the fine quartz sands of the Palm Springs desert. Its eyelids have interlocking granular margins that exclude dust, and its countersunk lower jaw prevents sand ingestion during headlong burrowing.
Behavior and Ecology
When pursued by predators such as roadrunners, desert kit foxes, or sidewinders, this lizard accelerates to blinding speeds across shifting dunes before executing a sudden headfirst dive directly into the loose sand. Using rapid lateral swimming motions of its body and tail, it submerges beneath the sand within seconds, leaving no track on the surface.
Conservation and Human Impact
Listed as Endangered by the IUCN and Federally Threatened under the US Endangered Species Act, the Coachella Valley Fringe-toed Lizard has lost over 80% of its historical sand dune habitat to golf courses, housing subdivisions, agricultural expansion, and windbreaks that block the natural wind transport of sand from Whitewater River.
Interesting Factoid
The Coachella Valley Fringe-toed Lizard lives exclusively on wind-blown sand; it can run across loose, blistering dunes at 15 miles per hour and then instantly ‘swim’ under the sand to escape desert heat.