Best Insects for Crested Geckos: 6 Feeder Options Ranked (2026)

Crested gecko diet (CGD) is one of the most convenient complete diets in the reptile hobby — but it is not enough on its own. Wild crested geckos on New Caledonia spend significant time hunting insects, spiders, and small invertebrates. That animal protein delivers amino acid profiles, movement-based enrichment, and micronutrients that no powder can fully replicate.

Feeding live insects 1–2 times per week is not optional enrichment. It is a core part of a nutritionally complete crested gecko diet, confirmed by ReptiFiles' crested gecko feeding research and Dubia Roaches' crested gecko care sheet.

This guide ranks the 6 best feeder insect options for crested geckos, covering protein content, calcium availability, practicality, and safety — so you can choose the right insects for your gecko's needs.

Quick Comparison: Top 6 Feeder Insects for Crested Geckos

Do Crested Geckos Actually Need Live Insects?

Yes — and the reason comes down to biology, not preference.

CGD powders are formulated to meet baseline nutritional requirements, but insects provide complete animal protein with a different amino acid profile than plant-derived or egg-based protein. They also provide enrichment: the act of tracking, stalking, and capturing prey activates neurological pathways that a passive feeding cup never reaches.

According to ReptiFiles' crested gecko food guide, crested geckos fed exclusively on CGD without insect supplementation often show slower growth rates, reduced activity levels, and lower reproductive output compared to geckos on a mixed diet.

The recommended protocol:

• CGD is the dietary base — offered 3–4x per week for adults, daily for juveniles
• Live insects supplement CGD — offered 1–2x per week year-round
• Calcium + D3 dusting on all live insects, every feeding

For the full diet framework, see our crested gecko care guide.

Pro Tip: Never offer CGD and live insects in the same feeding session. Give insects alone on insect nights, and CGD alone on CGD nights. This lets you track intake accurately and ensures geckos consume both food types rather than eating only the one they prefer.

The Insect Size Rule: Non-Negotiable

Feeder insects must be no larger than the space between the crested gecko's eyes.

This is the most important safety rule in feeder selection and applies to every insect in this list. An insect that is too large causes several problems:

• Impaction risk — the chitinous exoskeleton of an oversized insect can partially block the digestive tract
• Stress injury — large crickets can bite and injure geckos, especially overnight
• Regurgitation — if a gecko swallows a too-large feeder, it often vomits, which stresses the digestive system

Size guide by gecko age:

When in doubt, go smaller. A gecko can eat three small insects just as easily as one large one.

Calcium Dusting Protocol

With the exception of BSFL (which have a naturally favorable calcium:phosphorus ratio), all feeder insects in this list are heavily phosphorus-dominant. The Ca:P ratio of most common feeders ranges from 1:6 to 1:15 — the inverse of what crested geckos need.

Without corrective supplementation, a feeder-insect-only diet rapidly depletes calcium stores, leading to metabolic bone disease (MBD). The dusting protocol corrects this.

Standard dusting schedule:

How to dust:

1. Place feeder insects in a small container or plastic bag
2. Add a small pinch of calcium powder — just enough to lightly coat
3. Shake gently for 3–5 seconds
4. Offer immediately — powder falls off within minutes

For calcium supplement options, see our best crested gecko supplements guide.

Pro Tip: Over-dusting is a real problem. A thick white coating is too much — you want a light, barely visible film. Excess calcium powder consumed directly (not from insect tissue) can cause gut irritation.

How to Offer Insects: Tong Feeding vs. Free Roam

Both methods work. The choice depends on the insect type and your gecko's feeding behavior.

Tong Feeding (Recommended for Most Geckos)

• Hold the insect with soft silicone-tipped feeding tongs
• Wiggle gently in front of the gecko's face to trigger strike response
• Good for: dubias, silkworms, BSFL, hornworms
• Advantage: you control the feeding, can measure exactly how many insects were consumed

Free Roam (Acceptable for Confident Hunters)

• Place 3–5 insects loose in the enclosure at dusk
• Remove any uneaten insects after 15–20 minutes (especially crickets — they bite)
• Good for: dubias, crickets
• Advantage: provides full hunting enrichment — gecko must track and chase prey

Never free roam hornworms or large silkworms. These crawl into decor and substrate where they are difficult to retrieve, can drown in water dishes, and create hygiene issues.

Detailed Reviews

1. Dubia Roaches — Best Staple Feeder

Dubia roaches are the most practical high-quality staple feeder for crested geckos. The combination of 21% protein, low fat, soft exoskeleton, and zero escape risk makes them the default choice for keepers who want reliable nutrition without the management overhead of crickets.

Buy small or extra-small dubias (1/4 inch) for most crested geckos. A starter batch of 100–250 dubias lasts 3–6 weeks for a single gecko on a 2x/week feeding schedule. Store at room temperature (75–85°F) in a ventilated container with egg crate cardboard and feed them gut-load food — the nutritional quality of what the roach ate transfers directly to your gecko.

Note: Dubia roaches are illegal to possess in Florida and Hawaii. If you live in those states, black soldier fly larvae or crickets are your primary alternatives.

2. Black Soldier Fly Larvae — Best Calcium Source

BSFL are the single most important feeder insect for preventing MBD. Their natural 1.5:1 calcium-to-phosphorus ratio means every BSFL a gecko eats actively contributes to bone density rather than depleting it — without any dusting.

This does not mean you should skip dusting entirely on BSFL feeding nights (the multivitamin schedule still applies), but it does mean BSFL provide a meaningful calcium safety net for geckos whose keepers occasionally forget to dust. Use them at least once per week as a calcium-focused rotation alongside your primary staple.

3. Crickets — Best Budget Option

Crickets are the fastest way to trigger a hunting response in a lethargic or food-refusing gecko. Their unpredictable jumping pattern activates predatory instincts that dubia roaches, with their slower movement, sometimes do not. For budget-focused keepers with access only to a standard pet store, small crickets are a nutritionally sound choice when properly gut-loaded and dusted.

The management trade-offs are real: chirping overnight disturbs sleep, escaped crickets hide in furniture, and uneaten crickets will bite sleeping geckos. Always remove uneaten crickets within 15 minutes.

4. Silkworms — Best for Picky Eaters

When a crested gecko has been refusing CGD for two weeks or more, silkworms are the escalation step before a vet visit. Their irresistible slow crawl, soft body, and high moisture content produce feeding responses in geckos that have ignored every other food offered. Use them as the intervention feeder, then transition back to dubias or BSFL once the gecko is eating consistently.

Silkworms arrive in small cups or bags and need fresh mulberry leaves or artificial silkworm chow to survive. At 65–80°F, a batch lasts 1–2 weeks. Do not refrigerate — cold kills them.

5. Hornworms — Best Hydration Treat (Occasional Only)

Hornworms are the most hydrating feeder insect available. Their 85% moisture content makes them the best choice after a dehydration event: shipping stress, a power outage, or a temporary humidity drop. Offer 1–2 small hornworms (under 3/4 inch) once every 1–2 weeks maximum.

Do not make hornworms a regular staple. Their 9% protein is inadequate as a primary nutrition source. They also grow fast — a small hornworm can double in size within a week. Use them promptly or keep them at 60–65°F to slow growth.

According to PetMD's gecko feeding overview, high-moisture feeders like hornworms are best used as strategic supplements rather than regular feeders.

6. Pangea Fruit Mix with Insects — Best for Convenience

For keepers who travel frequently, manage multiple enclosures, or find live insect colony maintenance impractical, Pangea Fruit Mix with Insects is the most effective nutritional substitute. The farm-raised cricket and BSFL content in the formula delivers real insect protein without any live feeder management.

This does not fully replace the behavioral enrichment value of hunting live prey — for geckos in long-term captivity, behavioral enrichment matters. But as a convenience solution or temporary replacement during live feeder supply gaps, it outperforms any other CGD formula.

For a full breakdown of CGD options and how they compare, see our best crested gecko food guide.

Insects to Avoid

Not every insect sold at a pet store is safe for crested geckos. Avoid these:

Never use wild-caught insects. The pesticide and parasite risk alone makes this an unacceptable practice. Even backyard crickets from pesticide-free areas can carry parasites that require veterinary treatment.

Feeding Frequency by Life Stage

For juveniles under 6 months, prioritize BSFL and silkworms — their soft bodies and high digestibility reduce impaction risk during early skeletal development.

For comprehensive diet and husbandry guidance, see our crested gecko care guide and our best crested gecko food roundup for CGD options that pair well with live insect supplementation.