What to Feed a Gecko Lizard: Core Principles
Knowing what to feed a gecko lizard starts with matching the species and life stage. Most popular pet geckos, such as leopard geckos and fat-tailed geckos, are insectivores that thrive on a varied diet of appropriately sized live insects. Young geckos need more protein for growth, while adults do better with moderate portions a few times per week. Aim for reliable nutrition, safety, and routine rather than ad hoc feeding. The following sections break down safe foods, feeding frequency, supplements, hydration, and items to avoid.
Best Live Insects for Geckos
Choose live feeder insects that suit the size of your gecko, with prey no wider than the space between the gecko’s eyes. Offering variety reduces nutritional gaps and keeps feeding behaviors natural. Well-established choices include:
- Crickets: A staple that is widely available and easy to gut-load.
- Dubia roaches: High in protein, lower in fat than some alternatives, and have a long shelf life.
- Mealworms and superworms: Useful as occasional items; superworms are higher in fat and best suited for growing or breeding adults.
- Silkworms and phoenix worms: Soft-bodied options that are digestible and nutrient-rich.
Gut-Loading and Freshness
Feeder insects should be gut-loaded with nutritious vegetables and, when appropriate, commercial gut-load formulas for 24 to 48 hours before offering them to your gecko. Provide fresh water in shallow containers for the insects, and remove any uneaten insects after a few hours to prevent stress or injury to your gecko. Healthy, well-cared-for insects contribute directly to the overall nutrition your gecko receives.
Calcium, Vitamins, and Supplementation
Supplements help prevent metabolic bone disease and other deficiencies common in captive geckos. Lightly coat insects with a high-quality reptile calcium supplement that includes vitamin D3 if your gecko does not receive UVB exposure. On days without D3, you can use a calcium-only product. Multivitamin supplements are typically used once every 1–2 weeks, depending on the specific product guidelines and your gecko’s diet. Keep supplements fresh, stored in a cool, dry place, and follow dosing instructions carefully.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Primary food type | Live insects sized no wider than the space between the eyes | Veterinary and herpetological guidelines |
| Calcium with D3 | Use when UVB lighting is absent; follow label frequency | Captive reptile care standards |
| Calcium without D3 | Can be used on days without UVB or with brief exposure | Captive reptile care standards |
| Multivitamin | Typically once every 1–2 weeks for varied diets | Veterinary and manufacturer guidance |
| Gut-loading period | 24–48 hours before feeding to gecko | Nutritional best practices |
Frequency and Amount by Life Stage
Feeding frequency depends on species, age, and individual health. Hatchlings may eat daily or every other day, juveniles several times per week, and adults roughly every 7–14 days for many common species, though some may prefer more or less often. Observe your gecko’s body condition and adjust portions to maintain a healthy weight. Remove uneaten prey after a short period to reduce stress and maintain enclosure cleanliness.
Foods to Avoid or Limit
Not all insects and human foods are safe for geckos. Avoid feeding wild-caught insects due to potential pesticide exposure, parasites, or nutritional imbalances. Fireflies, lightning bugs, and many beetles can be toxic. Limit high-fat treats, and avoid processed foods, dairy, fruits, and vegetables, which are not suitable for insectivorous geckos. When in doubt, choose species-specific diets only after reviewing reliable care resources or consulting a qualified veterinarian.
Hydration and Monitoring Health
Provide clean water in a shallow dish large enough for your gecko to soak if needed. Some geckos also lick water droplets from surfaces or from damp hides. Monitor hydration by checking skin elasticity and mucous membranes, and adjust humidity in the enclosure to support shedding. Regular weight checks and observation of appetite, activity, and appearance help you catch issues early. Schedule routine veterinary exams with a reptile-savvy professional for ongoing care.
Quick Comparison of Common Feeder Insects
| Insect | Best For | Notes |
|---|---|---|
| Crickets | General variety and availability | Require fresh food and water; can escape if not contained. |
| Dubia roaches | Nutrient density and odor control | Less likely to bite; longer shelf life. |
| Mealworms | Occasional feeding for adults | Higher chitin and fat; not ideal for young or growing geckos. |
| Silkworms | High nutrition and soft prey | Soft-bodied, easy to digest; more expensive. |
Establishing a Simple Feeding Routine
Create a sustainable routine by choosing appropriate feeder insects, gut-loading them, coating with supplements as needed, and offering them in a secure container or by hand for species that will accept them. Keep a light schedule for live insects in the enclosure, remove leftovers promptly, and document feeding dates and observations. Regular husbandry tasks—clean water, proper humidity, and correct temperatures—support digestion and overall wellness. When you adjust frequency or diet, watch for changes in weight, skin condition, and behavior, and consult a reptile veterinarian if you notice concerns.