Green And Gold Frog

Fascinating facts about the Green And Gold Frog

• The growling grass frog can be up to 10 cm long, and its tadpoles can grow to 9.5 cm.
• Unlike most tree frogs, this species spends its days hunting and sun-bathing among dense reeds and swampy grasslands, and can even locate rival frogs by zeroing in on the pitch of their calls.
• Its breeding chorus sounds like a strangled duck: a three-part moan that rises then falls, a call short enough to set it apart from the similar green and golden bell frog.
• Introduced to New Zealand in 1867 by the Canterbury Acclimatisation Society, the frog has spread across both the North and South Islands, showing how quickly an amphibian can colonise new continents when humans move it.
• Populations have vanished from the lowest 200 km of the Murray River, yet targeted water deliveries to breeding sites have stabilized several River Murray groups, illustrating how precise habitat management can reverse local declines.

At a glance

About the Green And Gold Frog

The Green and Gold Frog, Ranoidea raniformis, is a strikingly large ground-dwelling tree frog that can reach almost 10 cm from snout to vent. Its mottled bright-green and bronze dorsal surface is peppered with dark brown, enamel-like bumps, and a pale stripe runs down the flank as a subtle skin fold. The undersides are a creamy hue with faint cobbling, while the thighs flash a vivid blue-green. Even the tadpoles echo this flamboyance, growing up to 9.5 cm and displaying coppery side pigments and an iridescent green sheen along their backs. This amphibian favors expansive swamps, permanent dams, ponds and reed-lined lakes across southeastern Australia and Tasmania, thriving in woodland, shrubland and coastal settings. Though an agile climber, it spends most of its day among dense reeds or swampy grasslands, basking in sunlight and hunting with a keen ear that can isolate the calls of rival frogs. Its three-part moaning call, "craw-ork ar-ar", rises then falls like a strangled duck, while breeding males grow black, rough nuptial pads on their thumbs. Females can hiss when threatened, and a single clutch may contain several thousand eggs laid in loose piles, with tadpoles developing over roughly twelve weeks. A surprising trait is the frog’s ability to hunt other frogs by homing in on their vocalizations, a behavior that underscores its acoustic acuity and predatory versatility.

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