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Ackie Monitor

Varanus acanthurus

LizardsIntermediate care
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Ackie Monitor

🌍 Overview

The ackie monitor (ridge-tailed monitor) is a small, active monitor lizard native to the rocky arid regions of northwestern and central Australia. Despite being a "dwarf" member of the Varanus genus - which includes the massive Komodo dragon - ackies exhibit the same intelligence and prey drive as their larger relatives. They use their spiny, whip-like tails to wedge themselves into rock crevices when threatened.

πŸ“‹ Quick Facts

Native Range

Northwestern and central Australia

Natural Habitat

Rocky desert, arid scrubland, and spinifex grassland

Adult Size

Around 2 feet (0.6 m) typical, reported from 17.3 inches (44 cm) to 30 inches (76 cm)

Wild Diet

Insects, spiders, scorpions, small lizards, and eggs

Wild Lifespan

Not well documented in the wild; the widely quoted 15 to 20 years is a captive-care figure

Conservation Status

Least Concern (IUCN)

πŸ“œ History

George Albert Boulenger described the species in 1885 in the second volume of his catalogue of the lizards held by the British Museum, naming all three currently recognized subspecies in the same work. Australia banned the commercial export of live native animals in 1982, so nothing has legally left the country for the trade since, and foreign stock descends from a small pool of earlier founders. The species turned out to breed freely in captivity, with clutches of up to 18 eggs, and that output is what carried it from specialist rarity to a fixture of the reptile hobby. Ridge-tailed monitors nevertheless remain among the Australian reptiles most often found for sale on overseas websites, which keeps smuggling out of Australia a live enforcement problem.

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Ackie Monitor

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Human

Adult Size

Around 2 feet (0.6 m) typical, reported from 17.3 inches (44 cm) to 30 inches (76 cm)

5-6 feet (150-185 cm); ~135-200 lbs

Wild Lifespan

Not well documented in the wild; the widely quoted 15 to 20 years is a captive-care figure

~73 years (global average)

Wild Diet

Insects, spiders, scorpions, small lizards, and eggs

Omnivorous - eats just about anything

Native Range

Northwestern and central Australia

Global - originated in Africa roughly 300,000 years ago

Natural Habitat

Rocky desert, arid scrubland, and spinifex grassland

Everywhere from arctic tundra to tropical megacities

Conservation Status

Least Concern (IUCN)

Least Concern (8+ billion and counting)

🧠 Test Yourself

Question 1 of 40 pts

What's the Ackie Monitor's native range?

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πŸ€“ Did You Know?

Ackie monitors 'taste' the air constantly with their forked tongues, using their Jacobson's organ to detect prey scent, just like their giant Komodo cousins!