Sri Lankan Painted Frog

Fascinating facts about the Sri Lankan Painted Frog

• A frog only 75 mm long, about the size of a matchbox, can carry a bold color pattern of reddish-brown patches that stretches from its eye to its arm, making it a tiny walking canvas in the leaf litter.
• Even though it lives from sea level up to 1,300 m, this species is most common in the southern Western and Eastern Ghats, showing how a single amphibian can thrive across a 1.3-kilometre elevation ladder.
• When the rains begin, males gather at water bodies and call, then lay a single layer of floating eggs whose black tadpoles hatch right on the surface, a simple yet effective breeding strategy.
• A single observation captured this frog perched beside a Poecilotheria tarantula in the same tree hole, hinting at a possible mutualism where the spider guards the frog while the frog keeps ants away from the spider’s eggs.
• The Brahmaputra River acts as a natural wall: this frog is found west and north of the river, while its close relative Kaloula pulchra stays east and south, illustrating how a river can split the evolutionary paths of similar species.

At a glance

About the Sri Lankan Painted Frog

The Sri Lankan Painted Frog, Uperodon taprobanicus, is a plump, narrow-mouthed amphibian that reaches about 75 mm from snout to vent, females slightly larger than males. Its dorsal skin is a slate-grey canvas streaked with symmetrical reddish-brown patches that radiate from the eye to the arm base, while the underparts are a pale yellow-grey mottled with darker speckles. In breeding season the male’s throat darkens, a subtle signal that precedes its chorus from the edges of ponds and rice paddies. This fossorial species spends daylight hours hidden beneath leaf litter, loose soil, or fallen logs, yet it is also an adept climber, often venturing into low branches of coconut and rubber plantations. Uperodon taprobanicus inhabits a mosaic of dry forests, wetlands, cultivated fields, and disturbed habitats across Sri Lanka, southern and eastern India, Bangladesh, and Nepal, from sea level up to 1 300 m. It feeds on a variety of insects, while its black tadpoles develop in floating egg masses on the water’s surface. A striking, rare interaction has been recorded with the large Poecilotheria tarantula: the spider, capable of killing small frogs, appears to guard the frog from predators while the amphibian patrols the spider’s egg chamber, keeping ants at bay, an unexpected mutualism that hints at the complex web of tropical forest life.

More other animals to discover

Browse Feravox