This species is known only from one locality (two sites in close proximity to each other) at 800m asl on the south slope of the north-west-south-east range of the mountains immediately to the north of Tarapoto Province, San Martin Department, in northern Peru. It probably occurs more widely, but it is still likely to have a restricted distribution.
Habitat and Ecology
The type locality is a rocky gorge into which two streams plunge. The sides of the gorge are nearly vertical rocky walls, and the floor of the gorge is littered with huge boulders. The species was found perched on ferns on boulders, but most were on the boulders within 10cm of the waterline at night. They breed in streams, with eggs laid on leaves above water.
It is a common species at the type locality, and was described from a series of 31 adult males.
The main threat to this species is habitat loss due to agriculture, wood extraction, and human settlement, as well as the impacts of tourism. The potential impacts of localized climate change and possible infection with the chytrid fungus require further investigation.
It is not known to occur in any protected areas, but the type locality at least is in need of some formal protection or management.
Lily Rodríguez, Jorge Luis Martinez, Ariadne Angulo, Karl-Heinz Jungfer, Wilfredo Arizabal 2004. Rulyrana saxiscandens. In: IUCN 2014