This species has a rather wide distribution at high altitudes in the mountains of central Papua New Guinea in Southern Highlands, Western Highlands, Eastern Highlands, and Chimbu provinces. Its altitudinal range is 2,230-3,400m asl.
Habitat and Ecology
It lives on the forest floor in dense, primary montane rainforest. It breeds by direct development. It is reasonably adaptable to degraded habitats, including rural gardens.
It is not usually a high-density species, but small areas with dense populations are sometimes found.
It is probably not threatened, since it is a reasonably adaptable species.
Its distribution, habitat requirements and abundance need to be properly documented. It is not known from any protected areas.
Red List Status
Least Concern (LC)
Listed as Least Concern since, although its known Extent of Occurrence is less than 20,000 km2, it occurs in an area of extensive, suitable habitat which appears not to be under significant threat, it has a presumed large population, and it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
Stephen Richards, Richard Zweifel 2004. Callulops wilhelmanus. The IUCN Red List of Threatened Species 2004: e.T57745A11679707. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T57745A11679707.en .Downloaded on 22 February 2019