Eastern Collared Lizard Care Guide

Eastern collared lizards are medium-sized, vividly colored reptiles native to semi-arid regions of the southern United States and northern Mexico. Known for their active temperament, striking patterns, and distinctive black neck bands, these lizards are popular among reptile enthusiasts.

Common morphs typically cost between $30–$80, while rare individuals may cost over $150. A single adult requires at least a 40-gallon breeder tank (36″ × 18″ × 18″), with sandy substrate for digging and plenty of climbing areas to support their energetic lifestyle (ReptiFiles Care Sheet).

Eastern Collared Lizards (Crotaphytus collaris) are diurnal, medium-sized lizards found in the south-central U.S. and northern Mexico, known for vivid hues and dark collars. Adults reach 8–14″ (20–35 cm) and possess powerful jaws for prey capture (ReptiFiles).

In the wild they occupy rocky outcrops, desert scrub, and grasslands, basking on stones in full sun and using bipedal sprints (up to ~16 mph) to evade predators. Highly territorial and solitary, males may fight or cannibalize tankmates; best housed alone. Lifespan in captivity often exceeds 10 years.

Provide a front-opening terrarium of at least 36″ L × 18″ W × 18″ H (90 × 45 × 45 cm); larger (48″ × 24″ × 24″) is ideal for exercise. Use a secure mesh top for ventilation and escape prevention.

Line with 4″ (10 cm) of a 60/40 topsoil–play-sand mix to allow digging. Spot-clean daily, replace every 3–4 months, and use paper towels when treating illness. Include two hides (warm and cool) and a flat basking rock under the heat lamp.

Create a gradient with a basking spot of 105–115 °F using a 50–75 W halogen flood lamp 8–12″ above a flat rock, and a cool zone of 75–85 °F. Night lows of 68–75 °F are acceptable (ReptiFiles).

Install a T5 HO 10.0 UVB tube 6–8″ above the basking area to achieve a UV index of 4–6. Supplement with a 6500 K daylight lamp on a 12 h on/12 h off timer (Arcadia).

Maintain ambient humidity at 30–50% with strong airflow via a mesh top or side vents to prevent respiratory issues.

Provide a humid hide (~70% RH) on the cool side using damp sphagnum moss; mist lightly and allow drying within hours to avoid mold.

Feed a variety of gut-loaded insects—crickets, Dubia roaches, locusts, superworms—daily for juveniles; adults 3–4×/week. Release prey into the enclosure for hunting enrichment.

Dust feeders with calcium (+D₃) at every feeding and a multivitamin once weekly. Offer pinkie mice or small anoles as treats monthly for adults.

Provide fresh dechlorinated water in a shallow dish daily and mist decor each morning to encourage droplet drinking.

Include secure rock piles and sturdy branches for climbing and perching. Provide hides on both warm and cool sides (ReptiFiles).

Add leaf litter or artificial plants for digging and cover. Scatter live prey for hunting, and occasionally rearrange decor for novelty.