Discoid Roaches vs. Grasshoppers for Crested Geckos
Grasshoppers have a certain romance to them — they look like "real" wild prey, and the idea of feeding your gecko something straight out of nature is appealing. But I've learned to separate what sounds natural from what's actually a good, safe feeder, and on that test grasshoppers fall well short of discoid roaches for crested geckos. Let me walk through why, because the reasons are practical and worth understanding before you reach for either.
Frame it right: insects are a supplement
First, the foundation. A crested gecko (Correlophus ciliatus) is an omnivore whose captive diet is built on a complete commercial crested gecko diet (CGD) — the fruit-and-protein powders like Pangea and Repashy. Live insects are a once- or twice-weekly supplement for protein and enrichment, not the main meal. So this comparison is really about which supplemental bug is the smarter, safer pick. (For the whole care picture, see the exotic animal care hub.)
It's also worth remembering cresties are heat-sensitive — they want roughly 72–78°F — so any feeder you keep should tolerate a cool room. That favors hardy roaches over delicate insects.
Discoid roaches: the practical staple
Discoid roaches (Blaberus discoidalis) check the boxes that matter for a supplemental feeder:
- Solid lean protein, roughly 20–23% protein with 5–7% fat — a clean protein boost without much fat.
- Soft, low-chitin body that digests easily and carries a low impaction risk, which matters a lot for small cresties.
- Slow, manageable movement. They don't jump, don't fly, and don't climb smooth walls, so feeding is calm and escape-free.
- Hydrating, around 65–70% moisture.
- Easy and cheap to keep, living for months in a simple bin and barely smelling, and low-risk to source because they're farmed in clean captive colonies.
The one honest caveat applies to every feeder here: discoids are phosphorus-heavy, so you must dust them with calcium — they don't have the "balanced ratio" some guides claim. For a steady supply, see my discoid breeding playbook, or buy them sized and ready — All Angles Creatures stocks discoid roaches suited to crested geckos.
Grasshoppers: lean, but problematic
Grasshoppers do have a genuine nutritional upside — they're lean and high in protein (roughly 17–20%), with low fat. If nutrition were the only axis, they'd be respectable. But the practical problems pile up fast:
- Hard exoskeleton and spiny legs. Grasshoppers are far more chitinous than discoids and have tough, spiky legs that are hard for a small gecko to chew and digest, raising the risk of refusal or digestive trouble — especially in juveniles.
- Sourcing is a headache. Captive-bred grasshoppers are hard to find, often seasonal, and don't ship as reliably as hardy roaches.
- Pesticide and parasite risk. Wild-caught grasshoppers are the worst offenders here — they're frequently exposed to pesticides and can carry internal parasites, both genuinely dangerous to a crested gecko. Never feed yard-caught insects.
- Fast, erratic, jumpy. Their darting movement can stress timid cresties and makes them prone to escaping the feeding setup.
- Short-lived and delicate in captivity, so they spoil or die quickly if not used promptly.
None of this makes a single, safely sourced grasshopper harmful. But as a regular feeder, the combination of tough digestion and sourcing risk knocks them out of contention.
Head-to-head
| Factor | Discoid roach | Grasshopper |
|---|---|---|
| Protein | High (~20–23%) | High (~17–20%) |
| Fat | Low (~5–7%) | Low |
| Digestibility | Soft, low chitin — easy | Hard shell, spiny legs — tougher |
| Calcium / Ca:P | Phosphorus-heavy — must dust | Phosphorus-heavy — must dust |
| Sourcing | Easy, year-round, captive-bred | Hard, seasonal, often wild-caught |
| Safety risk | Low (clean colonies) | Higher (pesticides, parasites) |
| Handling | Calm, contained | Jumpy, escapes, can stress gecko |
| Best role | Recommended supplemental staple | Occasional, only if safely sourced |
How I feed insects to a crested gecko
- CGD as the foundation, insects once or twice a week.
- Discoids as the supplemental insect, sized no larger than the space between the gecko's eyes.
- Gut-load 24–48 hours ahead with greens and quality chow.
- Dust with calcium every insect feeding, with periodic D3 per reptile supplementation guidance.
- Feed in the evening when cresties are active; remove uneaten prey in the morning.
The verdict
This one isn't close. Discoid roaches are the better feeder for crested geckos — comparable protein, far easier digestion, dramatically easier and safer sourcing, and calm handling. Grasshoppers' lean protein is real, but their hard bodies, spiny legs, and pesticide and parasite risks make them a poor everyday choice. If you ever want to add variety with a grasshopper, use only clean captive-bred stock and keep it occasional. For the staple, build on discoids.
Comparing other crested gecko feeders? See discoid roaches vs. silkworms and discoid roaches vs. hornworms, or browse the full exotic animal care library.