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 snout–to–vent length of 1.6 cm (0.6 in),[1][2] while the largest, the giant tree frog (L. infrafrenata), reaches a size of 13.5–14 cm (5.3–5.5 in).
They are distinguishable from other tree frogs by the presence of horizontal irises, no pigmentation of the eyelids, and their distribution east and south from Wallacea. Over one hundred species are recognised and new species are still being added, such as the Pinocchio frog discovered in 2008 and described in 2019.[3][4]
The frogs are native to Australia, the Bismarck Archipelago, the Solomon Islands, New Guinea, the Lesser Sunda Islands, and the Moluccan Islands. The appearance, behaviour and habitat of each species are usually linked. The small, dark-coloured frogs are generally terrestrial and never, or infrequently, climb. The larger green species are usually arboreal, with some only venturing to the ground to breed.
^Richards, Stephen J.; Mumpuni, Mumpuni; Günther, Rainer; Oliver, Paul M. (2019-05-14). "Systematics of New Guinea treefrogs ( Litoria : Pelodryadidae) with erectile rostral spikes: an extended description of Litoria pronimia and a new species from the Foja Mountains". Zootaxa. 4604 (2): 335–348. doi:10.11646/zootaxa.4604.2.6. ISSN1175-5334. PMID31717193. S2CID181852228.