Utila Island Iguana

Enclosure

Provide a large, humid, mangrove-style setup. Adults need at least 6 ft long × 3 ft deep × 4 ft tall, but bigger is strongly recommended.

Use cypress mulch, soil, or a soil-sand mix with leaf litter. Add thick branches, cork, and hideouts. Provide climbing structures because they are semi-arboreal.

Basking spot should be 105–115°F. Cool side 78–85°F. Ambient daytime 85–90°F. Night drop 75–80°F.

Humidity should be 60–80% with daily misting.

UVB is absolutely required (high output 10.0 or T5 HO).

Temperature tolerance

They can handle low 70s briefly, but prefer consistently warm conditions. Avoid temps above 115–120°F to prevent overheating.

Diet and Hydration

Utila iguanas are primarily herbivorous, especially adults. Juveniles may opportunistically eat insects.

Feed daily, with slightly large salads for adults and smaller portions for juveniles.

Weekly Feeding Example

• 5–6 days: Mixed greens + vegetables
• 1 day: Fruit treat

Juveniles

Add insects 2–3 days/week (small portions)

Staples

Collard greens, mustard greens, dandelion greens, hibiscus leaves/flowers, squash, cactus pads, endive, escarole, green beans.

Treats

Berries, mango, papaya, banana (very small), sweet potato, occasional insects for juveniles.

No Feed/Toxic

Avocado, onion, rhubarb, fireflies, citrus (limit), dog/cat food, spinach (high oxalates).

Hydration

Provide a large water bowl. They benefit from daily misting to simulate mangrove humidity. They may drink droplets off surfaces.

Supplements

Calcium with D3 2–3 times/week, multivitamin 1–2 times/week.

Behaviors affecting diet

They may refuse food if stressed, moved, or cold.

Health

Common risks include

• Respiratory infections from low temps/humidity
• Metabolic bone disease from lack of UVB or calcium
• Parasites (wild-caught individuals are high risk)
• Mouth rot from injuries or poor enclosure hygiene

Consistent UVB, warmth, varied diet, and stable humidity are essential for long-term health.

Handling

Utila iguanas can be skittish and nervous, especially younger individuals. With time, they can become moderately tame, but they are not naturally calm like bearded dragons.

Too much handling can stress them. Keep sessions short and calm.

Support the body fully, avoid fast movements, and always approach from the side.

Not recommended for kids during shows — they can scratch, tail whip, and bolt.

Requirements for Show Animals

Not ideal.

• Not reliably calm
• Can poop when stressed
• Do not typically tolerate 5+ show rotations
• Not great for being boxed all day
• Sensitive to cold drafts or overhandling