Why Discoid Roaches Make an Excellent Staple Feeder
- Role
- Staple feeder
- Protein
- ~20%
- Fat
- ~6.5%
- Moisture
- ~60%
- Chitin
- low
- Ca:P
- 1:3
- Calcium-rich
- No (dust it)
- Best for
- Most insectivores — beardies, geckos, frogs, monitors
I've fed a lot of different insects to a lot of different animals over the years, and when people ask me what I build a feeding routine around — the everyday workhorse, not the treat — discoid roaches (Blaberus discoidalis) are near the top of my list. They're nutritious, easy to keep, hard to escape, legal in places where other roaches aren't, and my animals actually chase them. But "perfect feeder" is marketing language, and I'd rather give you the honest version: what discoids genuinely do well, the numbers behind it, and the one real weakness you have to plan around. Get that straight and you'll feed them with confidence instead of guesswork.
What a discoid roach actually is
Discoids are a tropical roach native to Central and South America, in the family Blaberidae — the same broad group as dubia. Worth saying plainly up front, because cheap content gets this wrong constantly: a discoid is Blaberus discoidalis. It is not Blaptica dubia — that's the dubia roach, a different (if closely related) species. If a care article swaps those names mid-paragraph, that's your sign it wasn't written by someone who actually keeps them.
Adults reach about 2 inches, with a flattened, oval, glossy body in tan-to-brown tones. They go through incomplete metamorphosis — egg case carried internally, then live-born nymphs that molt their way up to adults over several months. Sexing them is straightforward once mature: males have longer, functional wings; females have reduced, short wings. Neither is a strong flier, but males can glide a short distance, so "discoids are wingless" — another common myth — is simply false.
In the wild they're decomposers on warm, humid forest floors, eating decaying plant matter and fallen fruit. That ecology is the whole reason they're a good feeder: they're hardy, they eat almost anything you give them, and what they eat becomes what your animal eats.
The nutrition, by the numbers
This is the part that matters most, so let's deal in actual figures rather than adjectives. Treat these as approximate, as-fed values — they swing with diet, life stage, and source — but the relationships are reliable.
| Metric | Discoid roach | What it means for your animal |
|---|---|---|
| Protein | ~20% | Strong staple-level protein for growth and tissue repair |
| Fat | Moderate (~6–7%) | Enough energy without the obesity risk of fatty feeders |
| Moisture | ~60–65% | Good hydration contribution, helpful for shedding and digestion |
| Chitin / exoskeleton | Low / soft | Easy to digest, lower impaction risk than hard-shelled insects |
| Ca:P ratio | Poor (phosphorus-heavy) | The weak spot — calcium dusting is mandatory |
Protein and fat: the staple sweet spot
Around 20% protein with moderate fat is right in the zone you want for an everyday feeder. It's enough protein to support growing juveniles and high-demand species like bearded dragons and many geckos, without the heavy fat load of something like a superworm (which sits around 15% fat and belongs in the treat column, not the staple column). You can feed discoids as a primary insect without watching the fat creep up on your animal.
Soft body, easy digestion
Discoids carry less chitin than crickets or mealworms, and their exoskeleton is genuinely soft. In practice that means easier digestion and a lower impaction risk, which matters most for young animals, recovering animals, and species with less robust guts. It's one of the most real, repeatable advantages they have over harder-shelled feeders — not hype.
The one honest weakness: calcium
Here's where I push back on a lot of what's written about discoids. You'll see claims that they have a "favorable" or "high" calcium-to-phosphorus ratio. That's wrong. Like virtually every feeder insect on earth, discoids are phosphorus-heavy with a poor Ca:P ratio. Insects just aren't a good natural calcium source — they're muscle and exoskeleton, not bone.
What that means for you is simple and it doesn't change: dust your feeders with a calcium supplement before offering them, and add calcium-with-D3 or a multivitamin on whatever schedule your species needs. Gut-loading helps the overall nutrient picture, but it does not fix the calcium gap. Anyone who tells you a roach is so well-balanced you can skip supplementation is setting your animal up for metabolic bone disease. The good news: this is true of all feeder insects, so it's not a strike against discoids specifically — it's just the rule of the hobby, and discoids follow it like everything else.
Why discoids earn the "staple" label
Beyond the macros, a few practical traits are what actually make discoids my go-to colony rather than just an okay feeder.
- Containment is forgiving. Adults can't climb smooth glass or plastic, so a plain bin or feeding cup holds them without a sealed lid or a petroleum-jelly barrier. The honest caveat: they can grip rough surfaces and screen, and newborn nymphs are pinhead-sized and walk straight through coarse vents — so cover any opening with fine mesh. Get that right and escapees are a non-issue.
- They barely smell. A healthy discoid colony is nearly odorless — a massive quality-of-life upgrade over crickets if these live in your house. Real odor almost always means too wet, overcrowded, or rotting food, not the roaches themselves.
- They gut-load beautifully. Feed the colony well for 24–48 hours before feeding off — fresh produce plus a protein base — and you're delivering that nutrition straight up the chain. The colony's diet is your animal's diet, one step removed.
- A range of sizes from one source. Because they breed in overlapping generations, a single colony gives you everything from small nymphs for geckos to ~2-inch adults for monitors and big frogs. One feeder species can cover a varied collection.
- Movement that triggers a feeding response. They walk a steady, visible path rather than hopping erratically like crickets or burrowing and playing dead like dubia, so most reptiles lock on and hunt them readily.
The legality angle (read before you order)
A big reason discoids are so popular in the southern US is legality. Florida restricts dubia roaches over invasive-species concerns, but discoids are widely accepted as a feeder there. If you're in dubia-restricted territory, discoids are often the practical staple.
But "legal in Florida" is not "legal everywhere," and these lists change. Some states and municipalities regulate which roach species you can keep or ship. Confirm your own state and local rules before buying — don't rely on a forum post about someone else's state. A reliable, non-commercial starting point is your state agriculture department or land-grant university extension; the University of Florida's entomology and nematology department is a particularly good resource on feeder insects and invasive species.
How discoids stack up against other feeders
Quick, honest comparison of the common options, judged as staples:
- Discoids vs. dubia: Nearly interchangeable nutritionally — both high-protein, moderate-fat, low-chitin, neither climbs smooth walls, both nearly odorless. Dubia breed somewhat faster; discoids win on legality where dubia are banned and often run a touch larger as adults. In dubia-legal areas, pick on price and availability; in dubia-restricted areas, discoids are the obvious call. (I go deep on this one in the head-to-head linked below.)
- Discoids vs. crickets: Discoids win on smell (crickets stink), noise (crickets chirp), containment (crickets jump), digestibility (lower chitin), and lifespan (crickets die fast). Crickets are cheap and easy to buy in a pinch, which is their main edge.
- Discoids vs. mealworms/superworms: Discoids are softer and easier to digest. Superworms are far fattier (~15%) — a treat, not a staple. Mealworms have a tougher shell that's harder on some animals' guts.
The takeaway I'd actually act on: a staple roach plus rotated variety beats any single feeder. Build your routine around discoids (or dubia), then rotate in higher-moisture treats like hornworms for hydration and the occasional superworm for variety.
Feeding discoids off the right way
The mechanics are simple, and they're the same five habits regardless of species:
- Size to the animal. A good rule is nothing larger than the space between the animal's eyes. Small nymphs for geckos and juveniles; larger nymphs and adults for bearded dragons, monitors, tegus, and big amphibians.
- Gut-load 24–48 hours ahead. Fresh produce (carrot, squash, sweet potato, leafy greens) plus a dry protein base. Skip heavy citrus and anything salty, oily, processed, or pesticide-treated.
- Dust with calcium every time — plus D3/multivitamin on your species' schedule. This is the step that covers the Ca:P gap. Don't skip it.
- Don't overfeed. Discoids are nutritious enough that free-feeding leads to obesity in many species. Match portions and frequency to your animal's needs.
- Feed promptly and cleanly. Offer them soon after gut-loading so the nutrition is at its peak, and use tongs or a feeding cup to keep it tidy.
A note on the claims I'm deliberately not repeating: you'll see discoids marketed as "allergen-free," "hypoallergenic," or "free of uric acid." Those claims are overstated and not well supported — any insect colony can carry allergens, dust, and frass. If you or your animal have sensitivities, discoids' low odor and tidy keeping help, but I wouldn't lean on a hypoallergenic guarantee.
Where to get them
If you want to start a colony or just buy feeders sized for your animals, All Angles Creatures stocks healthy, well-started discoid roaches in a range of sizes — it's my own feeder store, so I can vouch for how the stock is kept. Look for active, glossy roaches across multiple sizes whether you buy from me or anyone else; weak or mite-ridden starter stock will haunt a colony for months.
The honest bottom line
Discoid roaches deserve their reputation as one of the best staple feeders going: ~20% protein, moderate fat, soft and easy to digest, almost odorless, hard to escape, legal where dubia aren't, and available in every size your collection needs. Their one genuine weakness — a poor calcium-to-phosphorus ratio — is shared by every feeder insect and is fully handled by dusting with calcium before each feeding. Do that, rotate in some variety, and a discoid-based feeding routine is about as close to set-and-forget as reptile nutrition gets.
Ready to keep your own supply? See my full discoid roach care and breeding playbook, or settle the great debate with discoid roaches vs. dubia: which feeder reigns supreme.