Reptiles
Blue Spiny Lizard
Sceloporus serrifer · also called blue spiny lizards
Basking on a sun-warmed rock in southern Texas thornscrub, a male blue spiny lizard displays some of the most vivid blue colouration of any North American lizard, a striking contrast to the muted, camouflaged tones most desert reptiles rely on.
Overview
The blue spiny lizard, Sceloporus serrifer, is a large, vividly coloured lizard native to thornscrub and desert habitat across the southern tip of Texas and a broad range of Mexico. Its strikingly intense blue colouration, considerable size within its genus, and limited toehold within the United States make it one of the more visually dramatic and geographically marginal spiny lizards found north of the Mexican border.
A lizard that skips camouflage entirely
While most desert lizards rely on muted colouration to stay hidden, the blue spiny lizard’s vivid blue patterning does the opposite, functioning instead as a bold signal used in the high-stakes business of courtship and territorial defence.
Status
Least Concern — widespread and common across suitable thornscrub and desert habitat throughout Mexico, with a more limited presence in southern Texas.
Blue Spiny Lizard: common questions
Why is the blue spiny lizard so brightly coloured?
A male of this species displays vivid blue colouration across large portions of the body, among the most intensely blue patterning found on any North American lizard, and this striking colouration is used prominently in territorial disputes with rival males and in courtship displays directed at females.
Where in the United States can you find the blue spiny lizard?
This species reaches only the southern tip of Texas within the United States, representing the very northern edge of a range that extends much farther south through a broad stretch of Mexico, where the species is considerably more widespread.
How big does a blue spiny lizard get?
This species is one of the larger spiny lizards, with a stocky, heavily scaled body reaching a greater overall size than several smaller relatives within the same genus, though still built along the same general robust body plan typical of spiny lizards.
What kind of habitat does the blue spiny lizard prefer?
This species is native to thornscrub and desert habitat, favouring areas with enough rocks, low vegetation, and open ground to support its basking and foraging habits across its range through southern Texas and Mexico.