Critter Corner – White-lipped tree frog
#CritterCorner – High in the canopy, where the air is thick with moisture and the forest hums through the night, a soft shape clings quietly to a leaf. At first glance, it seems simple, just another green frog resting in the shadows.
The White-lipped tree frog is rarely just one shade. Some glow a vivid, leaf-bright green, almost luminous against the dark foliage. Others carry a softer, muted tone, green washed with brown, or even a pale, earthy hue that blends seamlessly into bark and branch. It’s a quiet kind of variation, one that rewards patience and a careful eye.
A crisp white stripe traces along the lower jaw and continues down the sides of the head, a defining feature that stands out no matter the frog’s colour. Even in their earliest stages, this marking persists. Tadpoles, dark brown and drifting through still water, carry a pale stripe along their bodies and tails, a subtle hint of what they will become.
When the warmer months arrive, something shifts again. During spring and summer, the forest fills with sound. Males call out with a deep, distinctive ‘wark, wark’, a call that echoes through the night and has often been likened to a distant dog barking (listen here). It’s a signal that breeding season has begun.
If you’re fortunate enough to encounter them at this time, you might notice a gentle flush of colour , a salmon-pink hue along their arms and legs. It’s delicate and fleeting, a seasonal touch that adds to their quiet charm. Intrigued? Check out Solar Whisper‘s photo gallery.
After mating, clusters of brown eggs are laid in clear jelly on the surface of still water, in both temporary pools and more permanent wetlands. Within around eight weeks, a full transformation unfolds , from egg to tadpole to frog , each stage shaped by the rhythms of the rainforest.
As adults, these frogs are impressive in size, reaching up to 14 centimetres, making them Australia’s largest native frog. Their diet is made up mainly of insects and other arthropods, playing a small but important role in maintaining balance within the ecosystem.
Their range stretches across northeast Queensland and into Papua New Guinea. While they are often associated with low-lying coastal areas, they are surprisingly adaptable, inhabiting closed forests, swamps, mangroves, and even gardens and parks where suitable conditions exist.
Despite this adaptability, their presence remains a quiet reminder of the intricate web of life supported by rainforest environments.
The White-lipped tree frog (Litoria infrafrenata) is listed as ‘Least Concern’ on the IUCN Red List.
Fun Facts about White-lipped tree frogs
- Australia’s Largest Native Frog: Growing up to 14 cm in length.
- Named for Its White Lip: A distinct stripe runs along the lower jaw and down the sides of the head.
- Breeding Call: A loud ‘wark, wark’ often compared to a dog barking.
- Distress Sound: Can emit a cat-like ‘meow’ when threatened.
- Rapid Development: Transforms from egg to frog in around eight weeks.
References
- Photo courtesy of David White (Solar Whisper Wildlife Cruises)
- Queensland Government Department of Environment
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