What Do Dart Frogs Eat?

By Allen, Owner & Head Breeder · Major League Exotics · Updated April 2026 · 8 min read

The Staple Diet: Fruit Flies

In the wild, dart frogs are opportunistic micro-predators — they eat tiny ants, mites, springtails, and other small invertebrates found in rainforest leaf litter. The alkaloids that make wild dart frogs toxic come from specific ants and mites in this diet, which is why captive-bred frogs on a fruit fly diet are completely non-toxic.

In captivity, wingless and flightless fruit flies are the closest practical equivalent to their natural diet. They are appropriately sized, nutritionally dense, easy to culture in large numbers, and dart frogs hunt them enthusiastically. Every serious dart frog keeper uses fruit flies as the foundation of their feeding program.

There are two species of feeder fruit fly used in the hobby, and choosing the right one for your frogs matters significantly.

Melanogaster vs Hydei — Which to Use

The two feeder fruit fly species differ primarily in size, and that determines which frogs they are appropriate for:

Which species needs which fly?

• D. tinctorius azureus, cobalt, peacock: Adults eat hydei primarily. Froglets start on melanogaster for the first 2–3 months.
• D. auratus: Adults do well on hydei. Melanogaster acceptable for smaller individuals.
• D. leucomelas: Adults eat hydei. One of the most active hunters — introduce flies directly onto the substrate and watch them go.
• Ranitomeya imitator, uakarii: Melanogaster only — hydei are too large for thumbnail species throughout their lives.
• Phyllobates bicolor: Adults eat hydei comfortably. One of the most aggressive feeders in the hobby.

Vitamin Supplements — Why They Are Essential

This is the most commonly neglected aspect of dart frog feeding and the most consequential. Fruit flies alone are nutritionally incomplete. In the wild, dart frogs eat dozens of different invertebrate species, each contributing different nutrients. In captivity, a fruit fly-only diet without supplementation leads to:

• Metabolic bone disease (MBD) — calcium and D3 deficiency causing curved spine, weak limbs, and eventually death. The most common supplement-related killer of dart frogs.
• Immune suppression — increased susceptibility to bacterial and fungal infections.
• Reproductive failure — females stop producing eggs or produce infertile clutches.
• Color fading — many dart frog species require carotenoids from diet to maintain full coloration.

The industry standard supplement used by virtually every experienced dart frog breeder is Repashy Calcium Plus. It contains calcium, vitamin D3, vitamin A, and a full micronutrient profile in a single powder. Use it at every feeding — not just sometimes.

Recommended supplements

• Repashy Calcium Plus (essential): Use at every feeding. A light dusting on the flies — not a heavy coating — is sufficient. One container lasts 3–4 months for a small collection.
• Repashy Superpig (optional): A carotenoid supplement that supports immune function and enhances red and orange coloration in species like auratus. Use 1–2 feedings per week alternating with Calcium Plus, or mix at half the normal rate of each.

How to Dust Fruit Flies

Dusting fruit flies sounds simple but there are a few techniques that make it significantly more effective:

1. Tap, don't pour. Tap the culture cup gently on the counter to knock flies to the bottom away from the lid. This prevents flies from escaping when you open it.
2. Transfer to a dusting container. Tap your desired number of flies into a small plastic bag or deli cup. A culture cup tapped on the counter will usually release 30–60 flies into a fresh container.
3. Add a small pinch of supplement. Less than you think. A visible dusting on the flies is enough — heavy coating wastes supplement and can cause vitamin toxicity over time.
4. Shake gently. Close the bag or cover the cup and shake gently for 3–4 seconds. The flies should have a light white-powder coating.
5. Introduce immediately. Supplement powder falls off fruit flies quickly — within 10–15 minutes the dusting is largely gone. Introduce dusted flies directly into the vivarium straight away. Do not pre-dust and wait.

Feeding Schedule by Age

These are guidelines, not rigid rules. Monitor body condition — a healthy adult dart frog should have a slightly rounded belly but no visible fat deposits at the base of the legs or behind the head. Adjust feeding frequency based on what you see. An overfed dart frog develops visible fat pads and becomes sluggish; an underfed one looks lean and stops calling or displaying.

Supplemental Feeders

Variety in the diet improves long-term health. Fruit flies should remain the primary feeder, but these supplemental options add nutritional diversity:

Springtails

A well-established vivarium with a healthy springtail colony provides a continuous source of supplemental prey. Dart frogs hunt springtails constantly as they forage through the substrate and leaf litter. This is one of the primary reasons a bioactive vivarium with live microfauna is nutritionally superior to a bare setup — the frogs are effectively snacking throughout the day between scheduled feedings. Feed your springtail colony with springtail food to keep the population thriving.

Isopods

Dwarf white isopods are small enough for most adult dart frogs to eat and are hunted opportunistically as part of normal foraging behavior. They are primarily valued as a cleanup crew but also contribute to dietary variety. Larger isopod species are not appropriate as feeders.

Micro crickets (for larger species only)

Pinhead crickets (1/8 inch) can be offered occasionally to larger adult tinctorius and auratus. They provide good nutritional variety and the hunting behavior is enriching. Dust with Repashy Calcium Plus before introducing. Only use pinheads — larger crickets can stress or injure dart frogs.

Fruit Fly Cultures — Buying vs Making Your Own

For a single enclosure with a pair of frogs, buying pre-made cultures is the most convenient option. One freshly started culture produces flies for 3–4 weeks — enough to feed a pair of adult tinctorius for the entire production period with flies to spare.

When to make your own

Once you have more than one enclosure — or if you are breeding frogs and raising froglets — making your own cultures becomes far more economical. A 1.5lb bag of our melanogaster media or hydei media produces many more cultures than buying them individually and pays for itself quickly.

To make a culture you need: a 32oz deli cup, a vented fabric lid, fruit fly media, wood excelsior for the flies to climb, and a starter culture of flies. Mix media with water per instructions, add excelsior, introduce flies, seal with the vented lid, and store at 72–75°F. Flies will be producing within 10–14 days for melanogaster or 18–21 days for hydei.

Common Feeding Problems

Frog not eating

New frogs often go off food for 1–2 weeks after the stress of shipping and moving to a new enclosure. This is normal. Ensure hides are available so the frog feels secure, keep temperature at 68–72°F, and offer small amounts of melanogaster every other day. Do not overfeed when they are settling in — uneaten flies stress the frog further.

Culture crashing

A fruit fly culture that stops producing is usually caused by mites, overheating, or contaminated media. Store cultures at 72–75°F away from direct sunlight. If mites appear, discard the culture and start fresh — mites spread rapidly. Making cultures with our own media significantly reduces contamination risk compared to homemade recipes.

Flies escaping the vivarium

This happens when too many flies are introduced at once or the vivarium lid seal is poor. Introduce smaller amounts more frequently rather than large quantities at once. Check the lid seal — particularly around the area where the light fixture sits.

Signs of poor nutrition

Watch for: curved or kinked spine, swollen or deformed limbs, difficulty climbing, faded coloration, or lethargy. These can all indicate supplement deficiency — most commonly calcium/D3. If caught early, increasing supplementation frequency often reverses early-stage MBD. See a reptile veterinarian familiar with amphibians if symptoms are advanced.

Frequently Asked Questions