Daruma Pond Frog

Fascinating facts about the Daruma Pond Frog

• They breed from April through July, and rice fields are an important breeding habitat.
• Males measure between 3.5 cm and 6.2 cm, while females reach up to 7.3 cm.
• They hunt by utilizing their hind legs to jump at prey that come within their feeding range.
• Two subspecies, the Tokyo Daruma pond frog and the Nagoya Daruma pond frog, occur in Japan’s temperate grasslands, rivers, marshes, ponds, canals and ditches.

At a glance

About the Daruma Pond Frog

The Daruki pond frog, Pelophylax porosus, is a modest-sized Ranid endemic to Japan, with males ranging from 3.5 to 6.2 cm and females from 3.7 to 7.3 cm. Two subspecies, P. p. porosus, the Tokyo Daruki pond frog, and P. p. brevipodus, the Nagoya Daruki pond frog, share a love for the country's temperate grasslands, rivers, freshwater marshes, ponds, irrigated fields, and the narrow canals and ditches that lace the landscape. Yet it is the rice paddies that truly define their world; these flooded fields provide the perfect breeding grounds where eggs are laid and tadpoles develop amid the gentle sway of water-logged stalks. Their life span is brief, just three to four years, but within that window they make the most of every season, emerging from the mud in April and courting until July, their calls echoing over the low-lying water. When hunger strikes, these frogs become swift, spring-loaded hunters. Their diet is a bustling banquet of insects and spiders, supplemented by ants, beetles, dipterans, bugs, pond snails and orthopterans. With a powerful flick of their hind-legs, they launch themselves at unsuspecting prey that drift within reach, a sudden burst of motion that can surprise even the most seasoned observer. This rapid, leaping predation, coupled with their reliance on human-crafted rice fields, reveals a surprising adaptability: a creature that thrives at the intersection of natural wetlands and agricultural landscapes, constantly balancing the rhythm of the wild with the cadence of cultivated water.

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