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ReptileTerrestrialIntermediate
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Pygmy Mulga Monitor
Varanus gilleni
One of the smallest monitor lizards in the world, arboreal and native to Central Australia. Highly active and intelligent, it requires semi-vertical desert enclosures and very hot basking spots.
Class:Squamata
Order:Squamata
Family:Varanidae
Genus:Varanus
Species:Varanus gilleni
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Environment
Terrestrial
Humidity
20 - 40 %
Day temperature
24 - 28 °C
Ambient temperature
28 °C
Night temperature
20 °C
Basking spot
50 °C
Adult size
19.4 cm
Minimum enclosure
>= 120 L
UVB
Medium
Species description
Geographical Origin and Habitat: Endemic to the arid interior of Central Australia. It is strictly arboreal, closely associated with Acacia (Mulga) woodlands, sheltering under loose bark and in hollow limbs.
Taxonomy and Genetics: Belongs to the family Varanidae, genus Varanus, and subgenus Odatria (dwarf monitors). Genetically adapted to arid arboreal life, retaining the high intelligence and complex behaviors of larger varanids.
Behavior and Habits: Diurnal, highly active, and inquisitive. It spends its active hours hunting insects, geckos, and smaller lizards. It utilizes its agility and sharp claws to climb effortlessly.
Morphology: A dwarf monitor reaching a total length of 30-34 cm. Features a grey-brown base color with reddish-brown longitudinal stripes and spots on the back, and a banded tail. Highly developed claws and a slender body.
Care, breeding and tankmates
Terrarium Setup: Requires a medium-sized semi-arboreal enclosure (minimum 90x45x60 cm). Furnish with hollow cork bark tubes, climbing branches, and rock ledges. Use a dry sand-soil substrate but provide a humid hide.
Lighting and Heating: Requires intense heat. The basking spot must reach 45-50°C (113-122°F), with ambient temperatures of 28-32°C (82-90°F) and a night drop to 20°C (68°F). Strong 10-12% UVB lighting is essential.
Humidity and Hydration: Keep humidity low (30-45%). A humid hide box filled with damp sphagnum moss is critical for shedding success. Provide a shallow water dish.
Feeding and Supplementation: Carnivorous. Feed a variety of insects (crickets, roaches, locusts) and occasional pinky mice or egg pieces. Dust insects with calcium twice a week and multivitamins once a week.
Compatibility: Can be kept in pairs or trios (one male, multiple females) if monitored for signs of bullying. Never house multiple males together due to violent territorial fights.
Health and Common Diseases: Highly prone to obesity in captivity; feed structured diets. Metabolic Bone Disease (MBD) can develop without adequate UVB. Watch for stuck shed on the digits, which can lead to necrosis.
Geographic Origin and Distribution
Endemic to the arid interior of Central Australia. It is strictly arboreal, closely associated with Acacia (Mulga) woodlands, sheltering under loose bark and in hollow limbs.
Origin
Australia, New Guinea, and Oceania
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 19.4 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 19.4 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 19.4 cm for this species, recorded as snout–vent length (SVL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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