Litoria is a genus of Hylidae tree frogs native to Australia, the Bismarck Archipelago, the Solomon Islands, New Guinea, the Lesser Sunda Islands, the Moluccan Islands, and Timor. They are sometimes collectively referred to as Australasian treefrogs. They are distinguishable from other tree frogs by the presence of horizontal irises, no pigmentation of the eyelids, and their Wallacean distribution. About 150 species are described, but several new species are described every year on average.
The species within the genus Litoria are extremely variable in appearance, behaviour, and habitat. The smallest species is the javelin frog (L. microbelos), reaching a maximum length of 1.6 cm, while the largest, the giant tree frog (L. infrafrenata), reaches a size of 13.5-14.0 cm. The appearance, behaviour, and habitat of each frog is usually linked. The small, darkly coloured frogs are generally terrestrial, and never, or infrequently, climb. The larger, green species are usually arboreal and some only venture to the ground to breed.