🦎 General Info

Lace Monitors (Varanus varius) are large, intelligent, and active lizards native to eastern Australia. They are named for the striking black and cream or yellow “lace-like” pattern across their bodies. Adults typically reach 6–8 feet in total length, with males generally larger and more robust than females.

Lace Monitors are highly intelligent, strong, and curious, capable of forming bonds with experienced keepers. They are semi-arboreal and semi-terrestrial, requiring climbing opportunities, spacious enclosures, and a varied diet. With proper care, Lace Monitors can live 15–20+ years in captivity.

1. Enclosure

Size

Lace Monitors are extremely active and require very spacious enclosures:

  • Juveniles: Minimum 6 ft x 3 ft x 3 ft

  • Subadults: Minimum 8 ft x 4 ft x 4 ft

  • Adults: Minimum 12 ft x 6 ft x 6 ft (larger is ideal)

Include climbing structures, basking areas, and space for roaming.

Material

  • PVC, wooden custom builds, or large glass/mesh vivariums

  • Must be secure, as Lace Monitors are strong and excellent escape artists

  • Adequate ventilation is essential

Substrate

  • Loose, moisture-retentive substrates suitable for digging:

    • Cypress mulch

    • Coconut husk

    • Organic topsoil/sand mix

  • Depth: 6–12 inches for natural digging

Décor

  • Sturdy logs, rocks, and branches for climbing

  • Hides on both warm and cool sides

  • Shallow or large water feature for soaking

  • Live or artificial plants for cover

  • Plenty of open floor space for roaming

2. Temperature & Lighting

Basking Spot

  • 115–125°F for proper digestion and metabolism

Ambient Temperature

  • 80–90°F during the day

  • Cool side: 75–80°F

  • Night Temperature: 70–75°F (do not let temps drop below 70°F)

UVB Lighting

  • High-quality T5 HO 10–12% UVB is essential for bone health

  • Replace bulbs every 6–12 months

  • Lace Monitors are diurnal and require full-spectrum lighting

Day/Night Cycle

  • 12–14 hours of light daily

  • Mimics natural diurnal activity patterns

3. Humidity & Water

Humidity

  • Moderate humidity: 60–70%

  • Supports skin health, shedding, and hydration

  • Provide misting as needed and a water feature

Water

  • Provide a large water dish or pool for soaking and drinking

  • Change water daily or when dirty

  • Juveniles may require soaking 2–3× per week

4. Diet

Lace Monitors are carnivorous, requiring a varied diet of protein with occasional supplements.

Staple Foods

  • Rodents: mice, rats, chicks

  • Fish and crustaceans

  • Insects: crickets, roaches, earthworms

Occasional Treats

  • Eggs

  • Lean meats (chicken, turkey, fish)

  • Small amphibians or reptiles occasionally

Supplements

  • Calcium powder: 3–4× per week

  • Reptile multivitamin: 1–2× per week

  • Avoid excessive fatty meats

5. Behavior & Handling

Temperament

  • Highly intelligent, strong, and active

  • Juveniles can be defensive; adults may tolerate handling with experience

  • Not recommended for beginners

Handling

  • Support the entire body; never lift by tail or limbs

  • Start with short, careful sessions

  • Use gloves or protective tools if necessary

Enrichment

  • Climbing branches and sturdy logs

  • Large water area for swimming or soaking

  • Deep substrate for digging and exploring

  • Scent trails or live prey for mental stimulation

6. Health & Lifespan

Lifespan

  • 15–20+ years with proper care

Common Health Issues

  • Metabolic Bone Disease (MBD): from poor UVB or calcium deficiency

  • Obesity: overfeeding or low activity can lead to weight problems

  • Respiratory infections: from low temperatures or high humidity without ventilation

  • Parasites: monitor feces regularly

Signs of Illness

  • Lethargy or refusal to eat

  • Swollen limbs or joints

  • Respiratory wheezing or discharge

  • Poor shedding or retained skin

  • Sudden weight loss or bloating

Vet Care

  • Consult a reptile veterinarian for serious symptoms

  • Routine check-ups are recommended, especially due to their size and strength

🦎 Final Notes

Lace Monitors are large, intelligent, and highly active reptiles best suited for experienced keepers. They require spacious enclosures, proper heat and UVB, climbing opportunities, a varied protein diet, and enrichment. With correct care, they thrive, display natural behaviors, and can become fascinating, long-term companions.