Nyctimystes – Papuan treefrogs

A genus of tree frogs commonly known as big-eyed frogs or white-lipped frogs

Primarily indigenous to Papua New Guinea, with some populations extending to islands in the Moluccas, these unique amphibians exhibit distinct characteristics that set them apart from their family members, including marked patterns of veins, lines, or dots on their lower eyelids.

Nyctimystes frogs are remarkably adaptable and can be found in a diverse range of habitats, including tropical and subtropical rainforests. Their striking appearance is a notable feature, with a bright green dorsal coloration complemented by an off-white belly. An unmistakable white stripe adorns their lower lip, adding to their distinctive appearance.

One of the remarkable behaviors exhibited by Nyctimystes frogs is their breeding rituals, which are often triggered by rain events. After rain showers, male Nyctimystes frogs climb into the trees surrounding ponds, swamps, and other suitable water bodies. Perched on vegetation, they begin calling loudly to attract female counterparts. The male’s call serves as a vocal advertisement to signal their readiness to breed and establish territory.

These calls vary among Nyctimystes species, with each having its unique vocalization pattern. These calls are crucial for communication between males and females and play a vital role in the reproductive success of these frogs. The females, upon hearing the enticing calls, approach the males in search of suitable mates.