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Tomato Frog (Dyscophus antongilii)

AmphibianFrogMadagascar

Tomato frog (Dyscophus antongilii), a plump, bright red-orange frog from Madagascar.

Tomato frog (Dyscophus antongilii).

Image: Brian Gratwicke from DC, USA, CC BY 2.0, via Wikimedia Commons.

Overview

The tomato frog (Dyscophus antongilii) is a round, plump frog found only on Madagascar, named for its colour: the females are a vivid tomato-red to orange, while males tend to be smaller and a duller yellow-orange. With its smooth skin and almost spherical shape when inflated, the tomato frog is one of the most recognisable amphibians of Madagascar.

That bright red is a warning. When threatened, a tomato frog can puff itself up to look bigger and secrete a thick, sticky, white substance from its skin that gums up a predator's mouth and can irritate the eyes and skin — a very effective deterrent.

Note: there are a few tomato frog species; details here use Dyscophus antongilii as a reference. Treat general statements as approximate and verify against authoritative sources.

Habitat & Range

Tomato frogs live in northeastern Madagascar, in lowland rainforest, swampy areas, and slow waters, including disturbed and human-modified habitats such as ditches and gardens near towns. They favour humid spots with shallow, still water for breeding, and they spend much of their time on the ground or partly buried.

Diet

Tomato frogs are insectivores and ambush feeders. They sit and wait, often partly buried in leaf litter or soil, and snap up insects and other small invertebrates — such as beetles, worms, and other ground-dwelling prey — that come within reach. They have hearty appetites suited to their stout build.

Behavior

The tomato frog's main defences are its warning colour, body inflation, and sticky secretion. When grabbed, it produces a gluey skin fluid that can stick a predator's jaws together and cause irritation, usually making the attacker release and avoid it. Tomato frogs are mostly nocturnal and spend dry periods quietly hidden, becoming active and breeding after rains, when males call from shallow water to attract the larger females. The tadpoles develop in temporary pools.

Human Interaction & Conservation

The tomato frog is a popular and charismatic species, well known from zoos and the pet trade, and it adapts to some human-altered habitats. However, collection for the trade and habitat loss have raised conservation concerns, and the species is legally protected. As an animal with an irritating skin secretion, it should be handled with care if at all. Consult the IUCN Red List and AmphibiaWeb for current status.

More photos of the tomato frog

A tomato frog on the ground, showing its rounded red body.

Tomato frog (Dyscophus antongilii), Madagascar.

Image: Frank Vassen, CC BY 2.0, via Wikimedia Commons.

Frequently Asked Questions — Tomato Frog

Why is the tomato frog so red?
Its bright tomato-red colour is a warning (aposematism). It signals to predators that the frog is unpleasant or risky to eat — and indeed, if attacked, the tomato frog oozes a sticky, irritating secretion. Females are the most vividly red; males are usually smaller and duller orange-yellow.
How does a tomato frog defend itself?
With colour, bluff, and glue. When threatened, it puffs up its body to look bigger and harder to swallow, and it secretes a thick, sticky white substance from its skin that can gum up a predator's mouth and irritate the eyes and skin. This usually makes the attacker spit it out and leave it alone.
What does a tomato frog eat?
It's an insectivore and ambush feeder, sitting still — often partly buried — and snapping up insects, worms, and other small invertebrates that wander close. Its plump build suits a sit-and-wait lifestyle rather than active chasing of prey.
Where do tomato frogs live?
Only on Madagascar, mainly in the northeast, in lowland rainforest, swamps, and slow waters, including some disturbed areas like ditches and gardens near towns. They need shallow, still water for breeding and are mostly active at night, especially after rains.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.