Ackie Monitor — Fact Sheet

Varanus acanthurus · Ackie Monitor

Full care guide and sources

📋 At a glance

🏠 Enclosure

This species should be kept alone except in carefully managed breeding situations. A practical adult enclosure is often at least around 150 x 75 x 75 cm, and larger is better. Juveniles can be started in a smaller enclosure — around 60 x 45 x 45 cm — which makes it easier to maintain prey availability and stable temperatures; upgrade to adult dimensions as the animal grows.

The juvenile enclosure is a management stage, not a long-term home. Young monitors should be easy to observe, feed, hydrate, and remove safely, but they still need a real heat and UV gradient, secure hides, and enough depth or structure to behave normally. Increase enclosure size before the animal becomes cramped; do not wait until nose-rubbing, frantic pacing, or food aggression appear.

Good basics include:

• Deep diggable substrate
• Secure rocks and hides
• Strong overhead lighting
• A large basking platform
• Plenty of active floor space

🪨 Substrate and furnishings

The enclosure should support digging, climbing, and thermoregulation.

Useful elements include:

• Deep packed substrate
• Cork tubes or rock shelters
• Stable stacked stone structures
• Elevated basking ledges
• Branches for climbing and enrichment

💡 Lighting

• Ferguson Zone 3; aim for UVI 4-6 at the animal’s back height on the basking site. See the full care guide for the evidence and any uncertainty.
• Measure with a Solarmeter 6.5; provide a gradient to fully shaded retreats near zero UVI. Lamp percentage alone does not specify exposure.
• Photoperiod: 10-12 h; no bright night light.

🌡️ Temperature

• Basking surface: 70-78 °C

• Warm-side air: 29-38 °C

• Cool-side air: 24-28 °C

• Night air: 20-24 °C

• Measure the basking surface with an infrared thermometer and air at the animal’s resting height with digital probes. A surface target is not an air temperature or a thermostat setting. Keep heat sources guarded and controlled, and provide a cooler shaded retreat.

• The high basking value applies only to the local surface after the lamps have warmed it fully. Use a broad lamp arrangement that warms the whole torso, with deep burrows and a measured cool retreat always accessible. Never raise enclosure air to this temperature. Juvenile enclosures must also preserve the full gradient; switch basking lights off at night.

💧 Humidity and water

Surface conditions should usually stay fairly dry, but the lizard still benefits from access to water and a more humid lower burrow zone.

Useful principles:

• Fresh water always available
• Dry surface substrate
• Humid retreat lower down in the enclosure
• Good airflow

A completely bone-dry setup from top to bottom is less useful than a dry enclosure with a proper microclimate gradient.

🪳 Feeding

Varanus acanthurus is a carnivorous lizard that does best on a varied prey-based diet.

Suitable foods include:

• Roaches

• Crickets

• Locusts

• Silkworms where available

• Occasional appropriately sized whole-prey items used carefully

• Adult maintenance meals: Every 2 days.

This is a starting schedule for measured portions in healthy, established adults, not an instruction to offer a large whole-prey meal at every feeding. Small insect meals and larger whole prey have different energy contents; reduce the portion or frequency if weight and body fat rise. Growing juveniles need smaller meals daily or every other day, with intake adjusted to growth. Reproductive, recovering or underweight animals need an individual plan. Record food, weight and condition; persistent refusal or weight loss needs veterinary review.

For this mainly insect-eating species, ReptiFiles recommends daily feeding for young juveniles and every other day after about six months. Use that age as a rough guide alongside growth and condition.

☠️ Safety

For Varanus acanthurus, bite prevention must address sharp teeth, gripping force and contaminated wounds. Monitor bites can cause punctures, lacerations, bleeding and infection; the contribution of oral secretions to human symptoms is not reliably established for every species. Do not infer a snakebite syndrome or an antivenom requirement from a venom label.

Use feeding tongs, predictable routines and voluntary movement into a secure compartment; avoid hand-feeding and forced restraint. After a bite, wash the wound with soap and water, cover it with a clean dressing and seek medical advice for broken skin, especially on a hand or near a joint. Large or deep wounds, uncontrolled bleeding, loss of movement or feeling need urgent care. Increasing redness, heat, swelling, discharge or fever may indicate infection. A clinician should assess wound damage, tetanus protection and any need for antibiotics.

🩺 Health — warning signs

For this dry dwarf rock monitor, the main captive problems are stuck shed on toes and tail tip, burns from intense basking spots, dehydration from a dry setup without a humid retreat, obesity from too many rodents, nose rubbing in cramped enclosures, and injuries from unstable rock piles.

Warning signs include swollen toes, retained shed rings, repeated glass pacing, weak climbing grip, sunken eyes, dull posture, food aggression that appears with cramped housing, and a soft or kinked tail tip.

When something changes, check basking surface temperature, UVB distance, hide humidity, substrate depth, rock stability, enclosure size, and feeding frequency. Serious wounds, swelling, breathing signs, repeated refusal to feed, weakness, or suspected burns need a reptile veterinarian. Monitors hide illness well, so a visible decline is already urgent.