[4] The Polypedates leucomystax complex began diverging during the Pliocene, and spread quickly after the Pleistocene due to human activity.

[4] The range of P. leucomystax has recently expanded in the Philippines and Indonesia due to the widespread conversion of forests into agricultural-use land.

In Japan, where it has been introduced, it is found on the islands of Okinawa, Tonaki, Kurima, Miyako, Ie, Iheya, Izena, Sesoko, and Yabuchi.

[6] Body of these rather small shrub frogs is moderately slender, ovoid, slightly flattened above, with sharply pointed tail.

The body colour is rather variable, with various shades of gray, green, yellow, reddish or dark brown.

The mating takes place at the margins of shallow pools, where the males first arrive and call the females with a distinctive loud, duck-like sound.

The female places between 100 and 400 eggs in a protective foam nest that is attached to vegetation or other objects above the water surface.