The backbone of any mantis keeper’s feeding routine. Drosophila hydei is the larger of the two common feeder fly species — big enough for L3+ nymphs, prolific enough to keep a colony going for weeks from a single culture. If you keep mantises past their first couple of instars, hydei is the feeder you’ll reach for most.
Why D. hydei? Flightless (a wingless mutant strain), so they can’t escape your enclosure or fill your home with fruit flies. Each culture produces hundreds of flies over its 3–4 week lifespan, peaking around week two. At roughly 2.5–3 mm they’re a substantial mouthful for a growing nymph — more calories per fly than melanogaster, which means less time chasing food and more growth.
Who They’re For
- L3 and older mantis nymphs, right up to sub-adults of smaller species.
- Dart frogs and other small amphibians.
- Jumping spiders past the sling stage.
- Small reptiles and anything that takes a soft-bodied flying insect.
For very young L1–L2 nymphs and spider slings, the smaller D. melanogaster is the right call. Once your animals outgrow hydei, step up to green or blue bottle spikes.
How to Feed & Get the Most From a Culture
Tap a few flies out onto a smooth surface or directly into the enclosure — they’ll walk up perches and walls where your mantis hunts. Gut-load and dust for best nutrition: the flies feed on the culture media (already vitamin-enriched), and a light calcium dusting once or twice a week balances their calcium-to-phosphorus ratio.
To keep flies coming for weeks, store the culture upright at room temperature (about 21–25 °C) out of direct sun. Tapping the cup before opening knocks flies down so fewer wander. A single producing culture comfortably feeds one or two mantises through an entire instar. For full upkeep — media, humidity, mold prevention, and re-culturing before a colony crashes — follow our fruit fly culture care guide.
Storage & Arrival
Every culture ships in a vented 32 oz deli cup with established media and a producing adult population. Expect flies within 24–48 hours of arrival — often sooner. Keep it upright and warm; never refrigerate a fruit fly culture, as cold kills the colony.
Frequently Asked Questions
What’s the difference between D. hydei and D. melanogaster?
D. hydei is the larger fruit fly (≈2.5–3 mm) and suits L3+ mantis nymphs and small predators; D. melanogaster is smaller (≈1.5–2 mm) and right for L1–L2 nymphs and spider slings. Hydei cultures are longer-lived; melanogaster cultures peak faster.
Are D. hydei fruit flies flightless?
Yes — these are a wingless flightless strain, so they can’t fly out of the enclosure or escape into your home. They still climb, so tap the culture down before opening it.
How many flies does one culture produce?
A healthy hydei culture produces hundreds of flies over a 3–4 week span, peaking around week two — enough to feed one or two mantises through a full instar. Keep it upright, warm, and out of direct sunlight.
What size mantis can eat D. hydei?
L3 nymphs and older. They’re a good staple right up to sub-adults of smaller species. For newly hatched L1–L2 nymphs, start with D. melanogaster. See the feeding guide for stage-by-stage sizing.
Looking for smaller flies? Check out our D. Melanogaster cultures — D. melanogaster at ~1.5–2.0 mm is the right size for L1–L2 mantis nymphs, jumping spider slings, and dart frog froglets.
