Greater Earless Lizard

cophosaurus texanus

The Greater Earless Lizard is a fascinating and highly active reptile native to the arid rocky terrains of the southwestern United States and northern Mexico. Instantly recognizable by its lack of external ear openings, this adaptation protects its hearing from the abrasive sands and rocky debris of its desert home. It is a diurnal, heat-tolerant species, often seen basking atop rocks or darting across gravelly flats at astonishing speeds. When startled, this lizard exhibits a unique behavior: it curls its tail over its back, displaying a bold black-and-white striped underside to confuse predators. Its spirited nature and striking movements make it a favorite sight for desert hikers and nature enthusiasts.

Habitat: Typically found in arid and semi-arid regions, particularly rocky hillsides, limestone canyons, desert washes, and gravelly flats with sparse vegetation.

Appearance

This medium-sized lizard, typically measuring between 8 and 18 cm in length, features a flattened body with a gray to grayish-brown coloration that perfectly mimics the surrounding limestone and granite rocks. It lacks external ear openings, presenting a completely smooth head profile. Males display vibrant blue or green patches on their bellies, bordered by two distinct, backward-curved black bars, while females are less colorful but develop beautiful peach or orange-pink flushes along their sides when gravid. The underside of their tail is distinctly marked with prominent black and white bands, which are highly visible when the tail is raised.

KingdomAnimaliaPhylumChordataClassReptiliaOrderSquamataFamilyPhrynosomatidaeGenusCophosaurus

Greater Earless Lizard

Interesting facts

Gravid females signal their reproductive state to males by developing brilliant pink or orange-yellow colors on their sides, which fade after egg-laying.

The absence of external ear openings is an evolutionary trait to keep sand out of their ears while digging or running through loose gravel.

To deter predators, they perform 'tail-wagging' displays, raising and waving their black-and-white banded tail to redirect attacks away from their body.

Special abilities

Lacks external ear openings, which prevents sand, grit, and debris from entering and damaging the middle ear when burrowing.

Curls and wags its zebra-striped tail over its back when threatened to distract predators away from its head and vital organs.

Maintains activity in extreme desert heat by adjusting its body posture on hot rocks and utilizing high heat tolerance.

Measurements & details

Length: 8+ cm
Weight: 0.005+ kg
Lifespan: 3+ years
Top Speed: 15 km/h
Clutch Size: 2+
Incubation: 30+ days

Diet & Feeding

Feeds primarily on a variety of small invertebrates, including insects and arachnids, which it actively hunts during the day.

Primary Foods

Grasshoppers
Ants
Beetles
Spiders
Crickets

Foraging Method

Pursuit

Ecological connections

eaten by

Greater Roadrunner

Geococcyx californianus

Preyed upon by roadrunners which actively hunt lizards on the desert floor.

eaten by

Coachwhip

Masticophis flagellum

Frequents the same rocky habitats and is a swift, active predator of these lizards.

hunts

Red Harvester Ant

Pogonomyrmex barbatus

The lizard opportunistically feeds on these abundant ground-dwelling insects.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Greater Earless Lizard?

The easiest way to identify Greater Earless Lizard is to use the Snappit nature identifier app.

How long is Greater Earless Lizard?

8+ cm

How much does Greater Earless Lizard weigh?

0.005+ kg

How long does Greater Earless Lizard live?

3+ years

How fast can Greater Earless Lizard move?

15 km/h

What does Greater Earless Lizard eat?

Feeds primarily on a variety of small invertebrates, including insects and arachnids, which it actively hunts during the day.

Where is Greater Earless Lizard usually found?

Typically found in arid and semi-arid regions, particularly rocky hillsides, limestone canyons, desert washes, and gravelly flats with sparse vegetation.

How does Greater Earless Lizard hunt?

Pursuit