Southwestern Fence Lizard

Southwestern Fence Lizard

Sceloporus cowlesi

Silhouette: SeismicShrimp · PhyloPic

Daily sighting probability ~20% · Possible
at Big Bend National Park
83 Verified sightings at Big Bend National Park From 2019 to 2026
273 Verified sightings across all 3 parks From 2019 to 2026
September Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Southwestern Fence Lizard

The southwestern fence lizard (Sceloporus cowlesi), also known as Cowles' prairie lizard, the White Sands prairie lizard or the White Sands swift, is species of spiny lizard in the family Iguanidae. The species is native to the Chihuahuan Desert of the south-western United States and north-central Mexico. Originally described in 1956 as Sceloporus undulatus cowlesi, a subspecies of the eastern fence lizard, subsequent DNA studies elevated the southwestern fence lizard to species status.

The following cladogram is based on Leaché and Reeder, 2002, and shows the relationship of Sceloporus cowlesi to other species in the "Sceloporus undulatus group". The specific name, cowlesi, is in honor of American herpetologist Raymond Bridgman Cowles. Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Guadalupe Mountains National Park 🇺🇸 United States
~70%
2 Big Bend National Park 🇺🇸 United States
~20%
3 Saguaro National Park 🇺🇸 United States
<5%

Quick answers

What are the chances of seeing a Southwestern Fence Lizard in Big Bend National Park?

About 20% of wildlife watchers report a Southwestern Fence Lizard sighting in Big Bend National Park, based on 83 verified sightings from GBIF citizen-science data.

When is the best time to see Southwestern Fence Lizard in Big Bend National Park?

September has the highest sighting rate for Southwestern Fence Lizard in Big Bend National Park in our monthly data.

← Back to Big Bend National Park