The
eastern fence lizard (
Sceloporus undulatus) is a medium-sized
species of
lizard found along
forest edges, rock piles, and rotting logs or stumps in the eastern United States. It is sometimes referred to as the
prairie lizard,
fence swift,
gray lizard,
northern fence lizard or
pine lizard. It is also referred to colloquially as the horn-billed lizard.