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Giant Girdled Lizard
Smaug giganteus
A majestic, heavily armored terrestrial lizard native to South Africa. Requires large, highly specialized enclosures with intense heating and UV lighting.
Class:Squamata
Order:Squamata
Family:Cordylidae
Subfamily:Cordylinae
Genus:Smaug
Species:Smaug giganteus
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Environment
Terrestrial
Humidity
40 - 50 %
Day temperature
28 - 35 °C
Night temperature
15 - 20 °C
Adult size
22 cm
UVB
High
Species description
Geographical Origin and Habitat: Endemic to the high-elevation temperate grasslands (Highveld) of South Africa, specifically within the Free State and Mpumalanga provinces. It lives in deep, self-excavated burrows in clay-rich soils of open plains.
Taxonomy and Genetics: Formerly classified under the genus Cordylus as Cordylus giganteus, it is now the type species of the genus Smaug (family Cordylidae), named after Tolkien's dragon. Genetic diversity is low due to extreme habitat fragmentation.
Behavior and Habits: Strictly diurnal and highly wary. Known for its characteristic posture, sitting at burrow entrances looking directly toward the sun (hence "Sungazer"). Highly social but territorial, living in colonies with strict burrow-sharing hierarchies.
Morphology: The largest of the girdled lizards, reaching 30-40 cm in total length. Features heavy, spiked osteoderms (bony plates) covering the body, especially prominent on the back of the head and the tail. Coloration is dark brown to straw-yellow.
Care, breeding and tankmates
Terrarium Setup: Requires a very large enclosure (minimum 150x80x60 cm for a pair). Use a deep substrate (20-30 cm) of sand and clay mix to allow burrowing behavior. Provide heavy, stable flat rocks and logs for basking and shelter.
Lighting and Heating: Requires intense light and heat. Establish a thermal gradient with a basking spot at 40-45°C (104-113°F) and a cool zone of 24-26°C (75-79°F). High-output UVB (12-14% or metal halide) is mandatory.
Humidity and Hydration: Low ambient humidity (30-45%). The deeper layers of the burrowing substrate must remain slightly damp to prevent dehydration and aid in shedding. Provide a shallow, sturdy water bowl.
Feeding and Supplementation: Insectivorous. Diet should consist of crickets, roaches, locusts, and occasional beetle larvae. Dust prey with calcium and vitamin D3 twice weekly to support their dense osteoderm growth.
Compatibility: Can be kept in pairs or small harems (one male, multiple females) in spacious setups. Males are highly territorial and must never be housed together.
Health and Common Diseases: Protected species vulnerable to stress. Highly prone to Metabolic Bone Disease (MBD) under inadequate UVB. Poor ventilation and high humidity lead to fatal respiratory infections.
Geographic Origin and Distribution
Endemic to the high-elevation temperate grasslands (Highveld) of South Africa, specifically within the Free State and Mpumalanga provinces. It lives in deep, self-excavated burrows in clay-rich soils of open plains.
Origin
North AmericaAfrica and Madagascar
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 22 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 22 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 22 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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