Mexican Alligator Lizard — Fact Sheet

Abronia graminea · Mexican Alligator Lizard

Full care guide and sources

📋 At a glance

🏠 Enclosure

Use a tall planted enclosure with strong cross-ventilation. A practical minimum for one adult is 60 x 45 x 90 cm; larger is better if the room can stay cool enough. Extra height is useful only when the animal can actually use it through branches, cork, vines, and foliage.

🪨 Substrate and furnishings

Build a cool arboreal thicket rather than an empty tall box. Useful features include:

• cork tubes and slabs fixed at several heights
• thin and medium branches with secure footing
• dense live plants or durable artificial cover
• a humid retreat and a drier retreat
• clean leaf litter over a drained substrate layer
• escape-proof vents, cable exits, and front doors

Quarantine is easier in a simpler enclosure. Move to a planted display setup only after the animal is eating, shedding, and passing normal feces.

💡 Lighting

Provide bright plant-supporting visible light and low-level UVB over part of the upper canopy. Plan around Ferguson Zone 1, with shade and cover close to the basking area so the lizard can regulate exposure.

🌡️ Temperature

• Basking spot: 25-27 °C
• Daytime air: 18-24 °C
• Cool zone: 16-20 °C
• Night: 14-18 °C

💧 Humidity and water

Aim for 60-80% humidity with short peaks around 75-90% after misting. The enclosure should become humid, offer drinking droplets, and then partly dry again.

Use misting, a dripper, or hand spraying according to the enclosure and season. Drainage matters: wet soil, sour leaf litter, and permanently damp cork can lead to skin and respiratory problems.

🪳 Feeding

Feed appropriately sized insects every 2-3 days, adjusting for age, season, body condition, and reproductive state. Good staples include small crickets, roaches, locusts where legal, black soldier fly larvae, silkworms, and other soft-bodied feeders.

Gut-load feeders and dust with calcium; use vitamin D3 and multivitamins sparingly according to UVB access and product guidance. Do not rely on mealworms or waxworms as staples, and remove loose insects before they stress the lizard overnight.

🩺 Health — warning signs

Common failures include chronic overheating, stagnant wet air, dehydration despite high humidity, poor ventilation, retained shed, weight loss from stress, parasites in recent imports, calcium imbalance, and injuries from unstable branches.

Watch for daytime gaping, repeated escape attempts toward vents, swollen toes, weak grip, sunken eyes, noisy breathing, loose droppings, or long refusal to feed. Correct temperatures, airflow, hydration, and diet early; persistent signs need a reptile veterinarian.