Ackie monitors, or spiny-tailed monitors, are small Australian dwarf monitors valued for their intelligence and activity.
Though small for a monitor, they are demanding lizards that need far more than typical reptile husbandry.
They are alert, fast, and curious, displaying complex behaviours such as digging, climbing, and problem-solving.
They suit dedicated, experienced keepers able to provide a large, high-heat, enrichment-rich enclosure.
Housing
Ackies need a large enclosure, at least 180x90x90cm and ideally bigger, with a deep substrate of around 30-60cm of a moisture-holding sand-soil mix that holds burrows.
Floor space and burrow depth are critical.
They require an intense basking zone of 50-60C surface temperature under a focused basking lamp, with a cool retreat around 24-28C, plus strong UVB.
This high-energy thermoregulation is essential to their digestion and health.
Diet
Ackies are insectivores and carnivores fed a varied diet of appropriately sized insects such as roaches, crickets, and locusts, with the occasional whole rodent or egg.
Gut-load and dust insects with calcium and vitamins.
Juveniles eat daily and grow fast; adults are fed several times a week.
They are prone to obesity on fatty prey, so monitor body condition and favour lean, varied invertebrates over frequent rodents.
Health
Ackies suffer when kept too cool or without high enough basking temperatures, leading to poor digestion and obesity.
Inadequate UVB and calcium cause metabolic bone disease, and shallow, dry substrate prevents natural burrowing and thermoregulation.
Provide intense heat, strong UVB, deep moisture-holding substrate, and a varied diet.
Their high metabolism and activity demand careful temperature and weight management, with support from a monitor-experienced vet.
Temperament
Ackies are intelligent and can become tame and interactive with consistent, patient handling, often recognising their keeper.
However, they are fast, strong for their size, and can scratch or bite if stressed.
They are best regarded as active, engaging display animals that may accept handling rather than as cuddly pets.
Their inquisitive nature rewards enrichment and routine, but they need an experienced, committed keeper.
A good fit for
Experienced, dedicated reptile keepers
Those able to build a large high-heat setup
Keepers wanting an intelligent, active monitor
People committed to daily enrichment
Common mistakes to avoid
Needs very high basking temps (50-60C)
Deep burrowing substrate is essential
Large enclosure and high cost often underestimated
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