What Do Frogs Eat? Wild, Pet & Seasonal Diets Explained

If you’ve ever watched a frog lunge at a passing insect with that lightning-fast tongue, you know these creatures are built hunters. But what exactly ends up on the menu varies dramatically depending on whether that frog is lurking in a pond or living in a terrarium. This guide cuts through the usual generic advice and lays out exactly what frogs eat at every life stage, from the moment they hatch as tadpoles to their adult years.

Wild frog prey: insects, snails, slugs, worms · Pet frog diet: live invertebrates like crickets, worms · Tadpole food: soft plant matter · Hunting method: sticky tongue · Carnivorous nature: yes, meat-eating

Key attributes of frog biology and diet are summarized below.

What do frogs eat in the wild?

Wild frogs are opportunistic carnivores that will eat essentially any living creature small enough to fit in their mouths. According to the Woodland Trust wildlife conservation blog, small frogs eat insects such as flies and moths, as well as snails, slugs, and worms—and they use long tongues coated in sticky saliva to snag these prey items. Most frogs, regardless of type, are not picky and will eat whatever prey can fit into their mouths.

Insects and invertebrates

Adult frogs primarily feed on a wide variety of insects, making them insectivores, according to Zoo Atlanta reptile and amphibian care resource. A tropical forest study of nine frog species documented by the Australian Museum scientific blog found that arthropods dominated the diets of all nine species tested. Beetles, crickets, spiders, and butterflies were the four main prey types identified.

Terrestrial frogs eat a variety of insects including fly larvae, caterpillars, grasshoppers, crickets, dragonflies, mealworms, and phoenix worms, according to Chewy pet care education resource. Both terrestrial and aquatic species also enjoy earthworms in addition to insects. In the Belly-spotted frog, wild cockroaches were the most abundant and frequently consumed prey.

• Flies, moths, beetles, crickets, dragonflies
• Earthworms, slugs, snails
• Spiders, caterpillars, larvae

Size-based prey differences

Large frogs may eat other small, live prey items in the wild, like small lizards, fish, or even smaller frogs, according to Chewy pet care education resource. The Orianne Society amphibian conservation organization reports that cannibalism is very common among amphibians, especially the American Bullfrog, which shows zero hesitation in eating smaller bullfrogs. In some studies, over half of the stomach contents of bullfrogs were smaller frogs, most of which were juvenile bullfrogs.

Bullfrogs have been observed eating chipmunks, juvenile weasels, and snakes, according to the Orianne Society conservation research. Bullfrogs and leopard frogs mature into adulthood feeding on a variety of insects, plants, mites, worms, and even smaller frogs, according to The Pond Guy pond management guide. Meanwhile, Leopard Frogs and Wood Frogs feed mostly on insects.

The pattern shows that even closely related species can occupy very different trophic positions depending on their size and jaw capacity.

What can I feed to a frog?

Pet frogs require live invertebrate prey, as most frogs feed exclusively on living food items and will ignore anything that isn’t moving. According to Carolina Biological Supply educator resource, native frogs and toads need live insects to eat, starting with fruit flies and small cricket nymphs as they grow. This live-food requirement isn’t optional—frogs are visual hunters that only strike at movement.

Live insects for pets

For juvenile and adult pet frogs, the standard prey items include crickets, earthworms, redworms, wax worms, hornworm larvae, and mealworms, according to Carolina Biological Supply biology education resource. Larger frogs and toads can be fed these items two to three times a week. Frogs eat a wide variety of insects such as snails, spiders, and worms, according to PetMD veterinary reptile nutrition resource.

Adult frogs are carnivorous and rely on a diet high in protein. The Spruce Pets notes that live insects trigger the hunting response frogs need to feed properly. Native pond frogs can often adapt to eating prepared foods like pellets, but most tree frogs and exotic species absolutely require live prey.

• Crickets (primary staple for most species)
• Mealworms and superworms
• Earthworms and redworms
• Dubia roaches
• Fruit flies (for small frogs)

Gut-loaded prey options

The nutritional value of feeder insects depends heavily on what those insects have eaten themselves. Gut-loading involves feeding nutritious foods to crickets or worms before offering them to your frog, ensuring the prey carries essential vitamins and minerals. Common gut-loading foods include fresh vegetables, commercial gut-load products, and calcium-fortified formulas.

Most pet frog owners purchase feeder insects from pet stores or breed their own colonies to ensure a steady, nutritious food supply. According to Chewy amphibian care guide, earthworms are readily available at bait and tackle shops, making them an accessible option for feeding pet frogs.

What not to feed a frog?

Several common feeding mistakes can harm captive frogs or lead to nutritional deficiencies. Understanding what to avoid is just as important as knowing what to offer.

Toxic or inappropriate foods

Never offer wild-caught insects from areas treated with pesticides or herbicides. These chemicals accumulate in insect bodies and can poison your frog rapidly. Additionally, avoid feeding amphibians vertebrate prey unless you are specifically caring for large species like bullfrogs that naturally consume small vertebrates.

According to Woodland Trust amphibian care guide, if there isn’t enough food available, tadpoles might even eat their fellow tadpoles. This cannibalistic tendency underscores how important proper feeding schedules and portion sizes are, especially when raising multiple tadpoles together.

• Wild-caught insects from treated areas
• Non-living prey (unless trained, most frogs won’t recognize it as food)
• Large vertebrates unless you have a bullfrog or similar large species
• Fruits, vegetables, or human foods (frogs cannot digest plant matter as adults)

Common mistakes

Feeding frogs exclusively on one type of insect leads to nutritional imbalances. A varied diet is essential. Overfeeding is another common error; uneaten insects in a terrarium can bite or stress the frog. Underfeeding, particularly during a frog’s transition to a new home, can lead to weakness and failure to thrive.

Tadpoles raised in captivity should never be given dairy, meat, or processed foods. According to Mr. Amphibian husbandry resource, tadpoles in captivity can be fed boiled baby spinach, algae wafers, bloodworms, commercial tadpole food, hard-boiled egg yolk, and nutrient-rich leafy greens.

The implication for pet owners is clear: sourcing live prey and maintaining its mobility until feeding time are non-negotiable requirements.

What do small frogs eat?

Small frogs and juvenile frogs have different dietary needs than adults. Their prey items must be appropriately sized, and their feeding schedules differ from mature frogs.

Tiny insect preferences

Small frogs eat insects such as flies and moths, as well as snails, slugs, and worms, according to the Woodland Trust wildlife observation blog. Their tongues are proportionally larger relative to their body size compared to adult frogs, allowing them to capture smaller, faster-moving prey. The hunting technique remains the same—long tongues with sticky saliva—but the target prey is smaller.

Tiny frog species like poison dart frogs primarily consume very small insects including fruit flies, springtails, and tiny ants. A tropical forest study documented by the Australian Museum field research blog found that even small frog species focus heavily on arthropods, particularly insects that match their own body size.

Pet care adaptations

For pet owners raising small frog species, Carolina Biological Supply living organism care guide recommends starting with fruit flies and small cricket nymphs. As the frog grows, the prey size should increase accordingly. The general rule is that prey should be no larger than the space between the frog’s eyes.

Newly hatched tadpoles can be fed boiled and cooled lettuce or spinach, and fish food for cold water fish when they get bigger, according to Amphibian and Reptile Conservation breeding FAQ resource. Once a tadpole transforms into a small juvenile frog, its diet changes and adult frogs and toads eat live insects, according to Mr. Amphibian tadpole development guide.

• Fruit flies (melon flies, Drosophila)
• Small cricket nymphs
• Pinhead crickets
• Tiny worms like whiteworms

What this means for keepers is that matching prey dimensions to the frog’s gape capacity prevents both acute injury and chronic digestive stress.

What do frogs eat in winter?

Winter survival presents frogs with a unique challenge: dramatically reduced food availability coincides with the need to conserve energy. How frogs handle this season varies by species and climate.

Hibernation impacts

During hibernation, frogs live off stored energy reserves of lipids and glycogen they built up before hibernating, according to Phipps Conservatory botanical garden research. In winter, frogs receive sufficient oxygen from cutaneous respiration because their metabolic rates drop sharply and they move very little. This means they require almost no food during the coldest months.

Adult Green Frogs spend the winter resting on the mud below the pond and can absorb sufficient oxygen through their skin during hibernation, according to Oakland Natural Areas wetland ecology blog. Some species, like bullfrogs, have a metamorphosis cycle that can last up to two years, requiring their tadpoles to survive the winter in the pond.

Seasonal adjustments

Tadpoles born in late broods may overwinter as tadpoles under ice, according to Northern Woodlands forest ecology publication. Winter tadpoles can swim and feed during the winter provided it is not too severe. These tadpoles have a higher surface area to volume ratio which allows them to absorb enough available oxygen through their skin to power their winter activity, according to Oakland Natural Areas seasonal observations.

Warmer water temperatures may speed up tadpole metamorphosis, while many tadpoles crowded together tend to delay it, according to Northern Woodlands ecological research. The longer a frog spends in the tadpole stage eating and growing, the larger it will be when it finally undergoes metamorphosis—and larger frogs are better able to escape predators and to compete for territories and mates.

The pattern reveals that even aquatic tadpoles face metabolic constraints when temperatures drop below a critical threshold, making thermal regime the primary driver of winter feeding behavior.

How to feed a pet frog: Step by step

Setting up a proper feeding routine for a pet frog involves sourcing live prey, establishing a schedule, and monitoring your frog’s health.

“Most frogs feed on living invertebrate prey items in the wild making them insectivores. The key requirement for captive frogs is maintaining this live-food diet.”

— PetMD (veterinary reptile nutrition resource)

“Tadpoles are scavengers that eat plant matter and parts of dead animals. Their diet changes dramatically once they undergo metamorphosis and transition to a fully carnivorous diet.”

— Mr. Amphibian (amphibian husbandry resource)

Amphibian enthusiasts note that frogs and axolotls share dietary overlaps, with the latter’s axolotl diet guide highlighting essential live prey for captives.

Frequently asked questions

For anyone keeping pet frogs, the choice is straightforward: live invertebrate prey is non-negotiable for most species. Source your feeder insects from reputable suppliers, gut-load and dust them with supplements, and establish a feeding schedule that matches your frog’s life stage and species requirements.