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Argentine Black and White Tegu (Chacoan Giant)
Salvator merianae "Chacoan Giant"
Chacoan giant tegu. A massive geographic locale of the Argentine black and white tegu, characterized by its larger size, prominent jowls in adult males, and high-contrast white coloration.
Class:Squamata
Order:Squamata
Family:Teiidae
Genus:Salvator
Species:Salvator merianae "Chacoan Giant"
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Environment
Terrestrial
Humidity
60 - 80 %
Day temperature
28 - 35 °C
Night temperature
22 - 26 °C
Adult size
50.1 cm
UVB
Medium - High
Species description
Geographical Origin and Habitat: Native to the dry forests, scrublands, and grasslands of the Gran Chaco region in South America (spanning Argentina, Bolivia, and Paraguay). A highly active diurnal reptile that digs deep burrows to escape temperature extremes.
Taxonomy and Genetics: Family Teiidae. *Salvator merianae* "Chacoan Giant" represents a distinct geographic locale of the Argentine black and white tegu, characterized by its larger genetic size potential, prominent jowls in adult males, and high-contrast white coloration.
Behavior and Habits: Diurnal, highly active, and exceptionally intelligent. They show advanced cognitive abilities, recognizing their keepers, responding to target training, and seeking physical contact. They undergo a defensive adolescent phase due to hormonal changes.
Morphology: Mature males are significantly larger, heavier, and develop massive jowls (cheek muscles) and a broader head. Females remain smaller and more slender.
Care, breeding and tankmates
Terrarium Setup: Requires a custom-built, very large enclosure (minimum 240x120x120 cm for an adult). Substrate must be deep (30-40 cm) to allow burrowing behavior (using a mix of coco fiber, topsoil, and play sand). Provide a giant, sturdy water basin for soaking.
Lighting and Heating: Requires high heat for digestion. Maintain a cool side at 24-26°C and a hot basking spot at 40-45°C using overhead halogen bulbs. High-output UVB (12-14% T5) is mandatory to prevent metabolic bone disease.
Humidity and Hydration: Maintain relative humidity around 70-80% to prevent shedding issues. Mist the enclosure daily and ensure the substrate remains damp underneath.
Feeding and Supplementation: Opportunistic omnivores. Juveniles are primarily insectivorous (roaches, locusts, earthworms) and eat small whole prey. Adults consume thawed rodents, chicks, fish, fruit (mango, papaya, berries), and vegetables. Supplement with calcium and D3 on boneless meals.
Compatibility: Solitary. Can be housed with similar-sized tegus in massive enclosures, but individual housing is highly recommended to avoid territorial aggression. Any smaller tankmate will be eaten.
Health and Common Diseases: High risk of obesity and fatty liver disease if fed fatty meats too often. Susceptible to metabolic bone disease (MBD) and dysecdysis (bad shed) if humidity or UVB are inadequate. Brumates (hibernates) naturally in autumn for 5-7 months.
Geographic Origin and Distribution
Native to the dry forests, scrublands, and grasslands of the Gran Chaco region in South America (spanning Argentina, Bolivia, and Paraguay). A highly active diurnal reptile that digs deep burrows to escape temperature extremes.
Origin
Extra-Amazon South America
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 50.1 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 50.1 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 50.1 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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