Introduction
Setting up a proper enclosure is the foundation of good Argentine Tegu care. These intelligent reptiles require a large, secure, and enriched environment that mimics their natural habitat in South America. Whether you’re building a custom wooden cage or upgrading from a juvenile tank, this article covers all you need to know about enclosure size, temperature, lighting, and humidity.
Minimum Enclosure Size
Argentine Tegus grow quickly and need plenty of space.
| Tegu Age | Enclosure Size |
|---|---|
| Hatchling (0–6 months) | 40–75 gallon tank |
| Juvenile (6–12 months) | 4x2x2 ft minimum |
| Adult (1+ years) | 6x3x3 ft minimum (preferably 8x4x4 ft) |
If you’re handy, custom-built wooden enclosures offer the most flexibility and space.
Temperature Gradient
Tegus are ectothermic, so they rely on external temperatures to regulate their body heat.
- Basking Spot: 100–110°F (38–43°C)
- Ambient Temperature: 80–90°F (26–32°C)
- Cool Side: 75–80°F (24–27°C)
- Nighttime: No lower than 70°F (21°C)
Use ceramic heat emitters or halogen bulbs. A thermostat and digital thermometers are essential for accuracy.
UVB Lighting
Tegus need strong UVB exposure to metabolize calcium and prevent metabolic bone disease.
- Use T5 HO 10.0 or 12.0 UVB bulbs
- Position the bulb inside the enclosure, 12–18″ above the basking area
- Replace bulbs every 6–12 months depending on manufacturer guidelines
Natural sunlight (unfiltered) can help if you take your tegu outdoors safely for short periods.
Substrate & Humidity
Argentine Tegus enjoy burrowing and need moderate humidity:
- Substrate options: Cypress mulch, organic topsoil, coconut fiber
- Depth: 6+ inches for digging
- Humidity range: 60–80%
Mist the enclosure daily or use an automatic fogger. A large water bowl for soaking helps raise humidity naturally.
Enrichment and Security
Tegus are intelligent and curious. To keep them active and reduce stress:
- Add climbing logs, rocks, tunnels, and multiple hides
- Rotate decor monthly to simulate novelty
- Ensure the enclosure has secure latches—adult tegus are escape artists!
Cleaning and Maintenance
- Spot clean daily (remove waste, leftover food)
- Deep clean monthly (replace substrate, sanitize surfaces)
- Check humidity and temps twice daily
- Replace UVB bulb as needed
Final Thoughts
A well-designed Argentine Tegu enclosure replicates their wild habitat, encourages natural behaviors, and supports long-term health. It’s a significant investment in time, money, and space—but the payoff is a healthy, happy lizard that thrives in captivity.