Green Iguana (Iguana iguana) Care Sheet

The Vivarium Vault: Comprehensive Care Sheets
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Green Iguana (Iguana iguana) Care Sheet

​A complete guide for the successful keeping of this large, highly arboreal, and strictly herbivorous lizard, emphasizing immense vertical space and a high-fiber plant-based diet.

​1. Overview & Commitment

  • ​Common Name: Green Iguana, Common Iguana

  • ​Scientific Name: Iguana iguana

  • ​Natural Habitat: Tropical rainforests and riparian (riverbank) habitats of Central and South America. They are powerful swimmers and strictly arboreal (tree-dwelling).

  • ​Size (Extreme): Males commonly reach 1.5 – 2 m (5 – 6.5 feet) in total length, including the tail, and are strongly built.

  • ​Lifespan: 15 – 20+ years in captivity.

  • ​Temperament: Highly intelligent and can be socialized, but males can become territorial and aggressive during breeding season. They are strictly diurnal.

  • ​:warning: Extreme Commitment Warning: Iguanas require custom, room-sized, vertical enclosures for their adult lives. They are not for beginners, as improper care often leads to severe metabolic bone disease (MBD) or aggressive behavioral issues.

    ​2. Vivarium/Enclosure

    ​Iguanas require massive, tall enclosures that prioritize height and security.

    • ​Minimum Adult Enclosure (Crucial): For an average adult, a custom enclosure of at least 2.4 m x 8 ft high, 1.8 m x 6ft wide, and 0.9 m x 3ft deep is the bare minimum. Custom rooms or modified closets are often utilized.

    • ​Enclosure Type: Custom-built wooden or PVC enclosures that are easy to clean and seal moisture. Must be secured against their immense strength.

    • ​Structure (Crucial): Provide thick, sturdy logs, platforms, and ramps positioned at various heights. The branches must be strong enough to support the iguana’s weight.

    • ​Basking Platform: Multiple platforms must be provided near the heat source.

    ​3. Substrate

    • ​Recommended Substrate: A simple, easily cleaned substrate like paper towels, reptile carpet, or large tiles for hygiene. If live plants are used, organic topsoil is suitable.

    • ​Avoid: Fine substrates (sand, wood shavings) to prevent impaction, especially since their diet is plant-based.

    ​4. Heating & Temperature

    ​Iguanas require extremely high, consistent temperatures for proper digestion of their fibrous diet.

    • ​Primary Heat Source: High-wattage Ceramic Heat Emitters (CHEs) and large heat panels connected to a dimming thermostat.

    • ​Basking Spot Temp (Extreme Hot Spot): 35°C – 40°C (95°F – 104°F). This should be measured directly on the basking platform surface.

    • ​Ambient Warm Area: 29°C – 32°C (85°F – 90°F).

    • ​Cool End: Should not drop below 26°C (78°F).

    • ​Night Time Temperatures: Should not drop below 24°C (75°F).

    ​5. Lighting & UV

    ​Strong, high-quality UV light is non-negotiable and mandatory for calcium absorption.

    • ​UVB Light (Mandatory): A high-output 10% or 12% T5 linear fluorescent tube is absolutely essential. It must span the length of the basking zone and be replaced every 6-12 months.

    • ​Visible Light: High-quality full-spectrum lighting (LEDs) is required to ensure bright, realistic daylight.

    • ​Photoperiod: Maintain a consistent 12-14 hour day/night cycle.

    ​6. Humidity & Hydration

    ​High humidity is crucial for skin and respiratory health.

    • ​Ambient Humidity: Must be maintained between 70% and 80%.

    • ​Misting/Fogging: Automated misting or fogging systems are often necessary to maintain high humidity. Misting should be done 2-3 times per day.

    • ​Water Dish: A large, sturdy water container or pool must be provided for soaking and hydration.

    ​7. Diet & Feeding

    ​Iguanas are strict herbivores and require a high-fiber, low-protein, low-fat diet. A poor diet is the leading cause of death and MBD.

    • ​Staple Diet (80-90%): A balanced mix of dark, leafy greens and high-quality vegetables. Must be chopped fine.

      • ​Greens: Collard greens, Turnip greens, Dandelion greens, Mustard greens, Hibiscus flowers (excellent calcium source).

      • ​Vegetables: Shredded squash (butternut, acorn), Carrots, Sweet potatoes.

    • ​Protein (Avoid): NEVER feed animal protein (insects, meat, dog/cat food) to adults, as this causes severe kidney failure.

    • ​Fruits (Treat): Offer fruits (berries, melon, banana) very sparingly, as treats only.

    ​Supplementation:

    • ​Calcium Powder (Pure, No D3): Dust all fresh food every day.

    • ​Multivitamin: Dust food once per week.

    ​8. Handling & Maintenance

    • ​Handling/Socialization: Requires consistent, calm, and daily interaction from a young age. Untamed adults can be dangerous, using their claws, teeth, and tail as weapons.

    • ​Caution: Males, especially, can display dominance and territorial aggression, requiring experienced management.

    • ​Maintenance: Daily spot cleaning is required. The water tub must be cleaned frequently.