
Source: Wikimedia Commons
Varanus acanthurus
A small Australian monitor reaching 70 cm, dark brown with bright yellowish to cream spots. Its tail is round in section and covered with very spiny scales, which is what gives the species its common names.
Varanus acanthurus is a small varanid of semi-arid Australia belonging to the subgenus Odatria. It attains a total length of up to 70 cm, with unconfirmed reports of wild animals reaching 34 inches. The tail is 1.3 to 2.3 times the length of the head and body combined, round in section and covered with very spinose scales. The upper side is a rich dark brown scattered with bright yellowish to cream spots that often enclose a few dark scales, and there are 70 to 115 scales around the midbody. Males mature at about 30 cm snout-vent length and females at 25 to 36 cm; hatchlings measure 15 cm and emerge after three to five months of incubation. In captivity it needs an extremely hot basking surface, but without somewhere cool to escape to it will die of heat stroke, so a large enclosure with a genuine temperature gradient is essential. Substrate moisture matters more than ambient humidity: the substrate should be damp enough to hold burrow humidity at 80 per cent or above. Small and manageable, it is widely kept as an introductory monitor.
Source: Wikipedia (CC BY-SA 4.0)
The Ackie's Dwarf Monitor lives 15-20 years.
The Ackie's Dwarf Monitor grows to Up to 70cm; the tail is 1.3-2.3 times the head and body combined, and hatchlings measure 15cm.
Origin
Semi-arid Australia in Western Australia, the Northern Territory, Queensland and South Australia
Lifespan
15-20 years
Sources: ReptiFiles: Ackie Monitor Care / ReptiFiles: Ackie Monitor Temperatures & Heating / ReptiFiles: Ackie Monitor Enclosure Size Requirements / Wikipedia (English) / Reptile Database
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Varanus acanthurus Boulenger, 1885
Synonyms: Varanus acanthurus brachyurus Sternfeld, 1919
Authority databases: GBIF · Reptile Database
Nomenclature follows global taxonomic authority databases.
Varanidae spp. are listed in CITES Appendix II. Because of Appendix II listing, an international CITES registration certificate is not required, but an export permit issued by the exporting country is necessary for importation. In Japan, only 2 species of Varanidae are designated as Specified Animals; this species is not included. It does not fall under Designated Invasive Species under the Invasive Species Act.
Sources: CITES Appendices (Varanidae spp., Appendix II) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
Up to 70cm; the tail is 1.3-2.3 times the head and body combined, and hatchlings measure 15cm
Mainly insects such as crickets and dubia roaches
Build a wide gradient with a basking surface of 70-78C, warm-side air of 29-38C and a cool side of 24-28C. The very hot basking surface is necessary, but without somewhere cool to escape to the lizard will die of heat stroke. Ambient humidity of 20-50 per cent is fine, but keep the substrate damp enough for burrow humidity to reach 80 per cent or more.
The recommended minimum for keeping one adult long term is about 150 x 75 x 120 cm, giving roughly 1.2 square metres of floor space. Provide a deep substrate so it can dig its own burrows, plus flat stones and cork for basking sites and hides, in a front-opening enclosure. Where that space is not available, keep only one animal per enclosure.
It is primarily insectivorous, taking crickets, dubia roaches and similar prey. Kept at correct temperatures it grows fast, reaching adult size in under a year. Dust feeders with calcium.
It is small and manageable for a monitor and is regarded as an introductory species. It is not particularly social, so keeping one alone is not a problem, and animals of markedly different sizes must never be housed together.
Varanidae spp. are listed on CITES Appendix II, so import requires an export permit; no Japanese registration certificate is needed for Appendix II. Of the varanids, only the Komodo dragon and the crocodile monitor are specified animals under Japanese law, and this species is not among them. Substrate that is too dry has been linked to impaction, and because very hot basking surfaces are used, check basking temperatures regularly as bulb output declines.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The average lifespan of Ackie's Dwarf Monitor is 15-20 years. With proper care and nutrition, they can live a long and healthy life.
Ackie's Dwarf Monitor typically reaches Up to 70cm; the tail is 1.3-2.3 times the head and body combined, and hatchlings measure 15cm as an adult. Size may vary depending on care conditions and individual genetics.
Ackie's Dwarf Monitor feeds on: Mainly insects such as crickets and dubia roaches. Aim for a balanced diet with appropriate feeding frequency.
The price of Ackie's Dwarf Monitor varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: October 1, 2026