- Large lizard with large, spiny dorsal scales.
- Long tail.
- Dorsal ground color is green-gray to reddish.
Dorsal pattern varies with sex, but both sexes have a dark band across the neck bordered on both sides by a lighter pigment.
Females and young have dark crossbands on entire dorsum and perhaps a thin dark middorsal stripe.
Males lose dorsal crossbands and develop blue patches on throat and each side of belly.
Distinctly banded (black and white) tail.
Sceloporus poinsettii grows to adult total lengths of 12.5-29 cm (5-11.5 in), including tail.
In North America, Sceloporus poinsettii is found from the Edwards Plateau region of central Texas to Mew Mexico and into northern Mexico.
Sceloporus poinsettii is a diurnal species of lizard. Active and quick, Sceloporus poinsettii will retreat to a crevice when threatened. This species feeds on insects and tender vegetation.
This live-bearing lizard gives birth to young in June or July. As many as 11 young are born.
Sceloporus poinsettii prefers rocky terrains in arid and semi-arid environments where it is commonly seen on boulders, in canyons, and in rocky outcrops.
The crevice spiny lizard is not a protected species in Texas and can be legally collected with a hunting license.
The single subspecies of Sceloporus poinsettii found in Texas, S. p. poinsettii, is found across the Trans-Pecos and Edwards Plateau.