This species is widespread in the upland forests of New Guinea from Okapa in the central-eastern highlands of Papua New Guinea including the Huon Peninsular, to the Anggi Lakes region of the Vogelkop Peninsula, Papua, Indonesia. It is also known from Agaun in Milne Bay Province, southeastern Papua New Guinea. It occurs between 1,200-3,300m asl.
Habitat and Ecology
This species occurs along torrential mountain streams in rainforest. It breeds in fast moving, cold streams. It has not been recorded from disturbed areas.
It appears to be abundant wherever it occurs, and certainly numbers at least in the millions.
Its upland forest habitat in mainland New Guinea is in good condition, and there are no threats currently identified.
Given the declines of torrent-dwelling hylids in Australia, monitoring programs should be initiated for this species. Its range includes a few protected areas, however these areas require better management.
This form is probably a complex of more than one species.
Stephen Richards, Fred Parker 2004. Litoria angiana. In: IUCN 2014