The type locality of this species is on the west slope of Abra Tangarana, 7 km (by road) north-east of San Juan de Pacaysapa, 1,080 m asl, Lamas Province, Region of San Martín, Peru (Duellman and Schulte 1993).
Habitat and Ecology
It is an arboreal species found in montane cloud forests in the close proximity of streams (Duellman and Schulte 1993). Eggs are presumably laid on leaves and the larvae develop in streams. This species appears to have a narrow microhabitat requirement of flat damp areas with a constant source of water.
Three individuals were found over the course of two person/day surveys (von May et al. 2008). There is no additional information on this species' population status.
The valleys surrounding the type locality are being extensively cultivated (Duellman and Schulte 1993), so habitat loss due to agricultural practices, wood extraction and human settlement is suspected. The available habitat appears to be very fragmented.
Conservation of the area where this species occurs is required. Further research is needed into this little-known species especially its population status, ecology and threats including the potential impacts of localized climate change and infection with the chytrid fungus.
IUCN SSC Amphibian Specialist Group 2013. Nymphargus chancas. In: IUCN 2014