---
title: "Eastern Fence Lizard"
description: "Sceloporus undulatus — Gady. The eastern fence lizard (Sceloporus undulatus) is a medium-sized species of lizard in the family Phrynosomatidae."
canonical: https://animalchecklist.com/pl/animal/eastern-fence-lizard
last_updated: 2026-09-20
---

# Eastern Fence Lizard

> Sceloporus undulatus — Gady. The eastern fence lizard (Sceloporus undulatus) is a medium-sized species of lizard in the family Phrynosomatidae.

- Scientific name: *Sceloporus undulatus*
- Category: `reptiles` (Gady)
- Habitats: `forest` (Las)
- iNaturalist observations: 31335
- Wikidata: [Q2288496](https://www.wikidata.org/wiki/Q2288496)
- iNaturalist taxon: [36142](https://www.inaturalist.org/taxa/36142)

## Names

- en: Eastern Fence Lizard
- de: Östlicher Zaunleguan
- es: Lagartija espinosa de pradera
- nl: Haagleguaan

## Countries with the most observations

US (30409)

## Summary

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.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Eastern_fence_lizard

## Photo

![Eastern Fence Lizard](https://animalchecklist.com/img/animals/eastern-fence-lizard/medium.jpg)

Photo: Kat · CC0 · inaturalist — https://www.inaturalist.org/observations/193912600

## Machine access

`GET https://animalchecklist.com/api/v1/animals/eastern-fence-lizard?lang=pl` — see [openapi.json](https://animalchecklist.com/openapi.json).