Can Crested Geckos Eat Waxworms? Safety, Prep & Frequency

Waxworms are not toxic to crested geckos, but their very high fat content (≈22%) and poor calcium-to-phosphorus ratio make them suitable only as an infrequent treat. Offer no more than 1–2 waxworms once or twice a month to avoid obesity and nutritional imbalance.

How to Prepare

1. Source live waxworms from a reputable feeder-insect supplier — never wild-caught, which carry pesticide and parasite risk.
2. Gut-load waxworms for 24 hours on a calcium-rich diet (carrot, squash, commercial gut-load powder) to marginally improve their nutritional profile before feeding.
3. Dust waxworms lightly with a calcium-without-D3 powder immediately before offering, then place 1–2 worms in a shallow dish so the gecko can hunt without escaping into substrate.
4. Remove any uneaten waxworms within 20 minutes to prevent stress from crawling insects and to avoid the gecko developing a preference that makes it refuse its normal diet.

Warnings

• Waxworms are highly palatable and can cause 'food addiction' — crested geckos that receive them too often may refuse Crested Gecko Diet (CGD) powder or other staple feeders.
• The calcium-to-phosphorus ratio of waxworms is approximately 1:7.6, far outside the 1:1–2:1 ideal; relying on them as a regular protein source accelerates metabolic bone disease risk.
• High fat content contributes to hepatic lipidosis (fatty liver disease) in geckos fed fatty insects chronically — a documented concern in captive crested geckos per ARAV husbandry literature.
• Never offer waxworms to underweight juveniles as a fattening strategy without veterinary guidance; underlying illness, not caloric deficit, is usually the cause of poor weight gain.

Nutrition Facts

FAQ

Are waxworms safe for crested geckos?

Yes, waxworms are not toxic, but 'safe' depends on quantity and frequency. Occasional single-worm treats pose minimal risk to a healthy adult crested gecko. The danger is cumulative: high fat and a severely inverted calcium-to-phosphorus ratio cause problems only when waxworms become a regular part of the diet rather than a rare reward.

How many waxworms can I give my crested gecko?

Limit treats to 1–2 waxworms per feeding session, offered no more than once or twice per month. Because crested geckos are small (40–65 g at maturity), even a single waxworm represents a significant fat load relative to body weight. Juveniles under 15 g should not receive waxworms at all.

My crested gecko won't eat anything except waxworms — what do I do?

This is a well-documented behavioral issue called 'food conditioning.' Remove waxworms entirely for at least 4–6 weeks and offer only CGD powder and appropriately dusted staple insects (crickets, dubia roaches). Hunger will drive the gecko back to its staple diet within days for most individuals. If refusal persists beyond two weeks, consult a reptile veterinarian to rule out underlying illness.

Can waxworms replace crickets or dubia roaches as a protein source?

No. Crickets and dubia roaches offer substantially better protein-to-fat ratios and respond well to gut-loading, making them nutritionally superior staple feeders. Waxworms lack the mineral profile needed to support bone health in a growing or reproducing crested gecko. Use them only as motivational treats during handling sessions or after illness-related appetite suppression.

Do I still need to dust waxworms with calcium if I'm only giving one?

Yes. Given that waxworms already pull phosphorus ratios in the wrong direction, every feeding is an opportunity to partially offset the imbalance. A light dusting of calcium-without-D3 on the waxworm before offering is a simple step that costs nothing and helps maintain the dietary calcium balance your gecko's bones depend on.

More Crested Geckos Foods

• Can crested geckos eat grapes?
• Can crested geckos eat strawberries?
• Can crested geckos eat blueberries?
• Can crested geckos eat apples?

Other Reptiles & Waxworms

• Can leopard geckos eat waxworms?
• Can veiled chameleons eat waxworms?

Sources

• Reptifiles Crested Gecko Diet Guide (vet-reviewed, 2024)
• Association of Reptilian and Amphibian Veterinarians — Feeder Insect Nutritional Data