Reptiles — Other Lizards · Green Iguana (Iguana iguana)
Green Iguana Care Guide: Housing, Diet, and Health
Comprehensive guide to caring for large, arboreal green iguanas. Learn about enclosure size, temperature gradients, specialized feeding requirements, and common health concerns.
Green iguanas require a spacious, well-ventilated enclosure that mimics their native tropical rainforest habitat. Minimum recommended dimensions are 12 feet tall by 8 feet wide by 6 feet deep (3.6m x 2.4m x 1.8m). Vertical space is crucial for these arboreal animals; horizontal surfaces should not exceed 30% of total floor area.
Temperature and humidity gradients are critical. Maintain a basking spot around 95-100°F (35-38°C) with a heat lamp or ceramic heat emitter, while cooler areas reach 75-85°F (24-29°C). Humidity levels should fluctuate naturally: 60-80% during the day, increasing to 70-90% at night. Avoid direct sunlight and use UVB lighting specifically designed for reptiles, replacing every 6-8 months.
Green iguanas undergo significant dietary changes as they mature. Hatchlings (0-12 months) require live insects like crickets, mealworms, and waxworms (in moderation), feeding daily if possible. Juveniles (1-2 years) transition to more plant material: leafy greens (collard, mustard, dandelion), squash, melons, and fruits. Adults become strict herbivores, consuming a diet rich in vegetables, fruits, and commercial iguana pellets.
Feeding schedule for adults should be moderate: provide fresh food daily, but limit serving size to prevent obesity. Key foods include leafy greens (kale, collard), squash, carrots, apples, and berries. Avoid giving citrus or avocado products, as they're toxic. Supplement with calcium and multivitamin powders 2-3 times weekly.
Handling green iguanas requires patience and caution. They are intelligent but can be aggressive if stressed. Start with short sessions (5 minutes) when young, gradually increasing time as the animal becomes more comfortable. Never grab or restrain them; instead, let them climb onto your arms or shoulders. Be prepared for potential nipping during molting periods.
Common health issues in green iguanas include metabolic bone disease from calcium deficiencies, respiratory infections due to poor ventilation, and skin problems like metabolic derangements causing abnormal shedding patterns. Regular veterinary check-ups are essential, especially monitoring weight gain and observing stool quality.