Eastern Fence Lizard
Sceloporus undulatus
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyPhrynosomatidae (Frinosomàtids)
- GenusSceloporus (Spiny Lizards)
- SpeciesSceloporus undulatus (Eastern Fence Lizard)
The eastern fence lizard (Sceloporus undulatus) is a medium-sized species of lizard in the family Phrynosomatidae. The species is found along forest edges, rock piles, and rotting logs or stumps in the eastern United States. It is sometimes referred to as the fence swift, gray lizard, gravid lizard, northern fence lizard or pine lizard. It is also referred to colloquially as the horn-billed lizard. One of its most notable behaviors is that of its escape behavior when encountering fire ants, which have been known to invade and negatively affect many of their populations. Wikipedia →
20–30% of wildlife watchers report a Eastern Fence Lizard sighting in Shenandoah National Park, based on 155 days of visitor records from GBIF citizen-science data.
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States | |
| 3 | Congaree National Park | 🇺🇸 United States |
Quick answers
What are the chances of seeing a Eastern Fence Lizard in Shenandoah National Park?
About 25% of wildlife watchers report a Eastern Fence Lizard sighting in Shenandoah National Park, based on 155 days of visitor records from GBIF citizen-science data.
When is the best time to see Eastern Fence Lizard in Shenandoah National Park?
September has the highest sighting rate for Eastern Fence Lizard in Shenandoah National Park in our monthly data.