Xantusia vigilis
Silhouette: Beth Reinke · PhyloPic
In 3 days ~20% in a week ~40%
The desert night lizard (Xantusia vigilis) is a night lizard native to the Southern California Eastern Sierra and the San Gabriel Mountains into Baja California, southern Nevada, southwestern Utah and extreme western areas of Arizona.
The desert night lizard attains a snout-to-vent length (SVL) of 1.5 to 2.75 in (3.8 to 7.0 cm) with a tail roughly the same length. The lizard's coloring is usually grey, yellow-brownish, or olive. Despite their name, night lizards are active during the day. They are known to easily change their color, from light olive (usually during the evening) to dark brown during the day. It is a good climber and usually eats termites, small insects, spiders and other arthropods.
The desert night lizard is small for a reptile, with the average adult female at 80 mm in total length and 1.3 g in weight. Adult males are slightly smaller at 65 mm in total length and 1.1 g in weight. Male desert night lizards are distinguishable from females as they are lighter and shorter in length. They also have a stouter and wider tail, as well as enlarged femoral pores. Most desert night lizards have 12 longitudinal rows of rectangular ventral scales with 30-50... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Joshua Tree National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Las Vegas | 🇺🇸 United States |
No species of the same family or order lives in Las Vegas, so these are its closest relatives here: other reptiles.
With luck
About 10% of wildlife watchers report a Desert Night Lizard sighting in Las Vegas on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 12th most-seen of the 15 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
January, March, May–June, August and November
In those months about 10% of wildlife watchers report a Desert Night Lizard in Las Vegas on a given day, against under 5% in February, April, July, September–October and December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Desert Night Lizard sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Las Vegas, in our data
Las Vegas is the only city on Wallace's Line with enough records to rate Desert Night Lizard sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Desert Night Lizard is recorded against all the reptiles logged in Las Vegas (8 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
