Head to head
Colorado Desert Fringe-Toed Lizard vs Mojave Fringe-Toed Lizard
A Colorado Desert fringe-toed lizard and a Mojave fringe-toed lizard are close relatives sharing the same suite of remarkable sand adaptations, yet each is tied to a completely separate stretch of southeastern California desert.
| Colorado Desert Fringe-Toed Lizard | Mojave Fringe-Toed Lizard | |
|---|---|---|
| Scientific name | Uma notata | Uma scoparia |
| Range | Colorado Desert, SE California | Mojave Desert, mainly California |
| Fringed toes | Present, snowshoe-like | Present, snowshoe-like |
| Sand-diving ability | Yes | Yes |
| Sand-sealing nostrils and ears | Yes | Yes |
| Habitat | Active desert sand dunes | Active desert sand dunes |
| Range overlap between the two | None | None |
| Conservation status | Vulnerable | Vulnerable |
Colorado Desert Fringe-Toed Lizard vs Mojave Fringe-Toed Lizard: common questions
Can you tell a Colorado Desert fringe-toed lizard from a Mojave fringe-toed lizard by looking at it?
Not reliably — both species share the same fringed toes, sand-diving ability, and sand-sealing nostrils, and the two simply do not overlap in range, since the Colorado Desert fringe-toed lizard occupies the Colorado Desert of southeastern California while the Mojave fringe-toed lizard is confined to separate dune systems within the Mojave Desert.
Why do both species need to dive into sand?
Diving beneath loose sand lets both lizards disappear from predators almost instantly and also helps them escape extreme surface temperatures during the hottest parts of the day, an adaptation each species evolved independently in response to living on similarly harsh, shifting dune habitat.
Why are both of these lizards considered vulnerable?
Both species depend on specific active sand dune systems that can be degraded by off-road vehicle use, sand mining, and development, and since each lizard's range is already naturally patchy and restricted, this kind of habitat disturbance puts real pressure on both populations in similar ways.