Reptiles
Desert Night Lizard
Xantusia vigilis · also called desert night lizards
Beneath a single fallen Joshua tree limb that has lain in the same spot for years, a desert night lizard goes about essentially its entire life, rarely if ever venturing more than a short distance from the one piece of decaying debris it has always called home.
Overview
The desert night lizard, Xantusia vigilis, is a small, secretive lizard native to desert habitat associated with yucca, Joshua tree, and agave plants across the southwestern United States and adjacent Mexico. Its extraordinarily small home range and close dependence on decaying plant debris make it one of the more sedentary and habitat-specific small reptiles in North America.
A lifetime spent under one log
While most lizards range across a reasonably sized territory, the desert night lizard often settles for life beneath a single piece of fallen plant debris, an entire existence measured in inches rather than the wider stretches of ground most reptiles patrol.
Status
Least Concern — widespread and common across suitable desert habitat associated with yucca and Joshua tree debris throughout the southwestern United States and Mexico.
Desert Night Lizard: common questions
How far does a desert night lizard typically travel in its lifetime?
A desert night lizard spends nearly its entire life within a very small area, often remaining under or near a single fallen log or piece of yucca or Joshua tree debris for its whole lifetime, making it one of the more sedentary small lizards found anywhere in North America.
Is the desert night lizard only active at night?
No, despite its common name, a desert night lizard is active both during the day and at night, particularly when temperatures are moderate, meaning the name reflects general habits within its group rather than a strict nocturnal-only lifestyle.
Why is the desert night lizard so hard to spot?
A desert night lizard shelters almost exclusively beneath decaying yucca, Joshua tree, or agave debris and remains hidden beneath this cover for the vast majority of its life, meaning it is rarely observed moving across open ground even in areas where the species is locally common.
Where does the desert night lizard live?
The desert night lizard is native to desert habitat associated with yucca, Joshua tree, and agave plants across the southwestern United States and adjacent Mexico, generally remaining close to decaying plant debris from these specific host plants.