Reptiles
Granite Spiny Lizard
Sceloporus orcutti · also called granite spiny lizards
A male granite spiny lizard basks openly atop a sun-warmed boulder in the southern California desert, its iridescent blue-purple sheen catching the light against the pale granite it calls home.
Overview
The granite spiny lizard, Sceloporus orcutti, is a large, robust lizard native to rocky desert and mountain habitat across southern California and northern Baja California. Its brilliant iridescent male colouration, exceptional climbing ability on granite rock, and spiny, defensive scales make it one of the more strikingly colourful and well-armoured lizards of the southwestern desert.
Colour built for granite
Against the pale gray of a granite boulder, a basking male granite spiny lizard’s iridescent blue-purple sheen stands out dramatically, turning an otherwise ordinary rock outcrop into a display stage.
Status
Least Concern — widespread and common across suitable rocky habitat throughout southern California and northern Baja California.
Granite Spiny Lizard: common questions
Why do male granite spiny lizards look so colourful?
An adult male displays a striking iridescent blue-purple sheen across its body, one of the more vividly coloured spiny lizards in North America, a colouration that likely plays a role in territorial signalling and attracting mates during the breeding season.
Why is it called the granite spiny lizard?
This species is closely associated with granite boulders and rock outcrops across its southern California and Baja California range, where it basks, shelters, and forages, and its excellent climbing ability on rough granite surfaces gives the species its common name.
How does the granite spiny lizard defend itself from predators?
If captured, this species can deliver a firm defensive bite, and its rough, spiny, keeled scales make it an uncomfortable and difficult animal for a predator to grip and hold onto, buying the lizard a chance to escape into a nearby rock crevice.
Is the granite spiny lizard closely related to other spiny lizards?
Yes, it belongs to the same genus, Sceloporus, as several other North American spiny lizards, including the desert spiny lizard and Texas spiny lizard, though the granite spiny lizard is notably larger and more heavily built than many of its relatives.