WESTERN COLLARED LIZARD
Crotaphytus collaris – Say in James 1823
Crotaphytus collaris baileyi – Stejneger 1890
IDENTIFICATION:
DISTRIBUTION:
In Sonora, Mexico the range of this species and Crotaphytus nebrius closely approach one-another but do not overlap.
HABITAT:
This lizard inhabits both Sonoran upland and high desert sites, generally where rocks are present. It is most common on alluvial fans and the lower slopes of ridges and Madrean sky island ranges.
NATURAL HISTORY:
This species is saxicolous and is most often observed perched on rocks and rock outcrops. Male and female Crotaphytus collaris baileyi display their breeding coloration in May and early June. Smaller lizards are a large part of the diet of Crotaphytus collaris. This species will bask during the heat of the day in temperatures that are too extreme for other lizards. When frightened, collared lizards have the ability to run on their hind legs (bipedal motion) for short distances.
TAXONOMY:
Some authors suggest that Crotaphytus collaris is a highly variable species with several pattern classes, but none of the various forms are sufficiently distinct enough to warrant recognition. I chose to retain use of the subspecific names until further notice.
TYPE:
PERSONAL NOTES:
I have seen this subspecies on many occasions, but have never looked for it in Mexico. Close to the Mexico border I have commonly seen this lizard basking on small rocks along roads leading in to the Santa Rita Mountains of Santa Cruz County, Arizona.
CONSERVATION STATUS:
Crotaphytus collaris is common, widespread and in no need of protection.
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