This species is known with certainty only from the type locality of "Camp VIa, Utakwa [or Octakwa] River, 3000 ft", Papua, Indonesia. The altitude of this locality is 914m asl. A specimen in the South Australian Museum from the Star Mountains in Papua New Guinea might represent a significant range extension, but further studies are required to confirm the identity of this specimen.
Habitat and Ecology
It presumably inhabits streams in tropical rainforest. If it is similar to other species in the genus, it lays large eggs in torrential, clear and rocky streams, and the larvae presumably have large suckers.
This species has not been recorded again since it was first described, so its population status is unknown. A recent visit to the area failed to find it, but the survey was not exhaustive.
The threats to this species are unknown.
Given the declines of torrent-dwelling hylids in Australia, the population status of this species requires close monitoring.
Stephen Richards, Allen Allison 2004. Nyctimystes granti. In: IUCN 2014