MARBLED FROG Limnodynastes convexiusculus (Macleay, 1877)
Found throughout coastal and near coastal areas of the Northern Territory and North Queensland, this frog attains about 5 cm.
The preferred habitat of this species is low-lying swampy areas in Savannah woodlands, where specimens breed in thick grass verges and adjacent to other cover. Large numbers of this species are often found within a relatively small area.
This insectivorous species breeds in the Northern 'Wet' season after the first major rains.
It's call is a repeated high pitched 'plonk'.
The above was from the book Australian Reptiles and Frogs by Raymond Hoser and now available on a fantastic CD-Rom along with a vast amount of other information, papers and the like on reptiles, frogs and other wildlife.