MMatt Goren
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Feeder Insects

Why Discoid Roaches Make the Best Staple Feeder Insect

By Matt Goren · Updated June 26, 2026
Care at a glance
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 switched my feeder rotation to discoid roaches (Blaberus discoidalis) years ago and never looked back. This isn't a sales pitch — it's the practical case for why this species earns "staple feeder" status for most reptile and amphibian keepers, plus the honest trade-offs.

Nutrition that suits a real diet

Discoids run roughly 20-25% protein on a dry-weight basis with a moderate fat content (around 7-10%), and crucially a high meat-to-shell ratio. That soft body means more of the insect is digestible protein and less is hard chitin, so reptiles absorb more and are at lower impaction risk than they'd be on a mealworm-heavy diet.

One honest correction: you'll see discoids marketed as having "great calcium." They don't. Like nearly every feeder insect, discoids are phosphorus-heavy with a poor calcium-to-phosphorus ratio. That's not a knock on them — it's true of crickets, dubia, mealworms, and superworms too. You close the gap by dusting feeders with calcium and gut-loading the colony. (The one feeder that genuinely flips this is black soldier fly larvae.)

Size for every mouth

Discoids come in a usable size range, which makes them flexible:

  • Small nymphs (¼-½ inch) — hatchlings, small geckos, dart frogs, juvenile dragons.
  • Medium (½-1 inch) — sub-adult reptiles, adult leopard geckos.
  • Large/adult (1-2 inch+) — adult bearded dragons, blue tongue skinks, monitors, tegus.

Matching feeder size to your animal (no wider than the space between its eyes is the classic rule) prevents choking and digestive trouble. One colony covers everything from babies to adults.

The quality-of-life wins

This is where discoids really separate from crickets:

  • They don't climb smooth walls. A smooth-sided bin contains them with no fuss.
  • They're near-silent. No 2 a.m. cricket chorus.
  • They're low-odor when maintained — clean digestion means little smelly byproduct.
  • They're hardy and long-lived. Stored correctly, they last weeks to months, not the days a bag of crickets gives you.
  • They breed easily. A bin of discoids becomes a self-sustaining, free feeder supply.

Many roach species are restricted because they could establish wild populations. Discoids are a tropical species that can't realistically survive or breed in most U.S. climates if they escaped, which is exactly why they're the legal feeder roach in Florida and broadly accepted elsewhere. Always confirm your own state's rules, but discoids are the "safe" choice for a reason.

The honest trade-offs

Discoids aren't perfect for everyone:

  • They cost a little more than crickets and aren't stocked in every big-box pet store.
  • They're cold-sensitive, so winter shipping needs heat packs.
  • A skink or dragon new to roaches may need a feeder pre-killed the first few times.
  • You still must dust and gut-load — no feeder skips that.

Who they're best for

If you keep insectivorous or omnivorous reptiles and you're tired of restocking dying crickets, discoids are the upgrade. They give you better nutrition, a quieter house, a longer shelf life, and the option to breed your own supply. Pair them with rotation feeders (hornworms for hydration, silkworms for variety, the occasional fatty treat) and you've got a solid diet.

Ready to try them? All Angles Creatures stocks live discoid roaches across every size from nymph to breeding adult.

For the nutrition fundamentals behind these choices, see the Merck Veterinary Manual on reptile nutrition and the University of Florida IFAS Extension on insect husbandry.

New to keeping them alive long-term? Start with keeping discoid roaches alive: breeder secrets revealed, or compare options at the exotic animals hub.