# Tomato Frog — Facts, Threats & Conservation

*Dyscophus antongilii (Grandidier, 1877) — family Microhylidae*

> The tomato frog (Dyscophus antongilii) is a bright red microhylid frog endemic to north-eastern Madagascar that secretes a glue-like defensive substance to immobilise predators' mouths; it is listed Near Threatened as an estimated 80–90% of the island's original forest has been lost.

**IUCN status:** Near Threatened — Dyscophus antongilii; threatened by habitat loss and collection  ·  **WARN range:** Madagascar, North-eastern Madagascar — Antongil Bay area and surrounding forest

## Quick facts
| Fact | Value |
| --- | --- |
| Length | Up to about 10 cm in D. antongilii |
| Defence | Glue-like adhesive secretion from skin glands |
| Colour | Bright red or orange — aposematic warning |
| Range | North-eastern Madagascar (Antongil Bay area) |
| Endemism | Madagascar only — part of ~90% vertebrate endemism |
| Main threats | Forest loss; pet trade collection |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Amphibia
- **Order:** Anura
- **Family:** Microhylidae
- **Genus:** Dyscophus
- **Species:** Dyscophus antongilii

## Conservation status
- **Status:** Near Threatened
- **Population:** Unknown; declining with habitat
- **Trend:** Decreasing
- **Assessed:** 2004
- **CITES:** Appendix II
- Forest loss from tavy and charcoal is driven by rural poverty. Antongil Bay forest blocks need protection alongside trade regulation.

## Key facts: Tomato Frog
- Tomato frogs (Dyscophus) are round, bright red or orange frogs endemic to Madagascar.
- When threatened they secrete a thick glue-like substance that can jam a predator's mouth or eyes shut.
- The secretion is adhesive, not a neurotoxin — a different defensive strategy from poison dart frogs.
- Madagascar holds roughly 90% vertebrate endemism; Dyscophus is part of the island's endemic frog fauna.
- Dyscophus antongilii is listed Near Threatened; an estimated 80–90% of original forest has been lost.
- Forest loss from tavy and charcoal production is driven by rural poverty; the pet trade adds collection pressure.

## The glue defence
Most brightly coloured frogs advertise toxicity. Tomato frogs advertise stickiness. When grabbed or bitten, Dyscophus secretes a thick, white, viscous substance from parotoid and dorsal skin glands. The material is not a fast-acting poison — it is a defensive adhesive that glues the predator's mouth parts together or seals its eyes shut.

The frog sits still while the predator struggles to clear the glue, then hops away. The strategy works against snakes, birds and mammals that attack by biting. It is less effective against predators that swallow whole without chewing. The bright red colour is aposematic — a warning that handling this frog is a bad idea — but the mechanism is mechanical rather than chemical.

## Three Dyscophus species
The genus Dyscophus contains three species, all Madagascar endemic. D. antongilii — the tomato frog proper — is the largest and reddest, from north-eastern Madagascar around Antongil Bay. D. guineti is similar but smaller, from the north-west. D. insularis occurs on Nosy Be and nearby islands.

All three share the glue defence and the round tomato-like shape. D. antongilii carries the highest profile and the Near Threatened listing, reflecting its restricted range and ongoing habitat loss. On an island where roughly 90% of vertebrates occur nowhere else, losing a genus takes a defensive system that exists nowhere else with it.

## Forest loss around Antongil Bay
Dyscophus antongilii depends on humid lowland forest with leaf litter and standing water for breeding. The Antongil Bay region has lost substantial forest to tavy agriculture, logging and settlement expansion. An estimated 80–90% of Madagascar's original forest cover is gone island-wide, and the north-east is not exempt.

Tavy clears the understorey and leaf litter these frogs need. Charcoal production removes canopy trees that maintain humidity. The pressures are the same across Madagascar: rural poverty drives land clearing because families lack other income, and charcoal is often the only affordable cooking fuel. Conservation that works protects forest blocks, creates breeding ponds in community reserves, and addresses poverty through alternatives — not by blaming subsistence farmers without context.

## Pet trade and chytrid
Tomato frogs are kept in captivity and exported under CITES Appendix II. Wild collection adds pressure on Near Threatened populations already losing habitat. Captive breeding reduces but does not eliminate wild take.

Like all amphibians, tomato frogs face the background threat of chytrid fungus, though Dyscophus has not been among the hardest-hit genera. The immediate pressure is habitat: a frog that breeds in forest pools cannot persist in cassava fields. Madagascar's amphibians as a class reflect the island's isolation — and its vulnerability as an estimated 80–90% of forest disappears.

## What WARN does
WARN publishes free, sourced species education across Madagascar's herps. Tomato frogs use glue, not poison — a defensive system found only on an island where roughly 90% of vertebrates occur nowhere else and forest loss driven by rural poverty continues.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Tomato Frog
### Are tomato frogs poisonous?
Not in the dart-frog sense. They secrete a thick glue-like adhesive that jams predators' mouths or eyes shut. The bright colour warns predators to avoid them.

### Where do tomato frogs live?
Madagascar only. Dyscophus antongilii is from north-eastern Madagascar around Antongil Bay; other Dyscophus species occur in the north-west and on Nosy Be.

### Are tomato frogs endangered?
Dyscophus antongilii is listed Near Threatened. An estimated 80–90% of Madagascar's original forest has been lost, and habitat loss is the main pressure.

### Can you keep a tomato frog as a pet?
Captive-bred animals are kept legally under CITES Appendix II, but wild collection continues. Prefer captive-bred sources to avoid pressuring Near Threatened wild populations.

### Are tomato frogs dangerous?
It is not a poison in the dart-frog sense — it is a defensive adhesive that can jam a predator's mouth shut or glue its eyes closed long enough for the frog to escape. Handle gently and with normal pet or farm care.

### How long do tomato frogs live?
A precise wild lifespan for tomato frogs is not firmly established in the sources cited on this guide. The tomato frog (Dyscophus antongilii) is a bright red microhylid frog endemic to north-eastern Madagascar that secretes a glue-like defensive substance to immobilise predators' mouths; it is listed Near Threatened as an estimated 80–90% of the island's original forest has been lost. Where longevity figures appear in the literature they vary by region, sex and whether animals are wild or captive.

### How big is a tomato frog?
A Tomato Frog is about Up to about 10 cm in D. antongilii. The tomato frog (Dyscophus antongilii) is a bright red microhylid frog endemic to north-eastern Madagascar that secretes a glue-like defensive substance to immobilise predators' mouths; it is listed Near Threatened as an estimated 80–90% of the island's original forest has been lost. Conservation status: Forest loss; pet trade collection.

## Sources
- [IUCN Red List — Dyscophus antongilii](https://www.iucnredlist.org/species/6937/12804409)
- [CITES Appendices](https://cites.org/eng/app/appendices.php)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/tomato-frog