This is a little-known species, currently known only from Tutumbaro (at 1,840m asl) on the Río Piene, Ayacucho Department, in southern Peru. It might be more widespread than this.
Habitat and Ecology
The type locality is a disturbed cloud forest in a river valley with bamboo, ferns and elephant's ear plants. The individuals were recorded calling at night from the upper sides of leaves of herbaceous vegetation and elephant's ear plants within 1m of a slow stream. Eggs are presumably laid on leaves, with larval development in streams.
There is no information on the population status of this species, which has been collected only once. Four adult males were used to describe this species.
The threats to this species are not known. The area in general is subject to loss and degradation of habitats due to human colonization and agricultural development.
Further research is needed into this little-known species, for example regarding the potential impacts of localized climate change and possible infection with the chytrid fungus.
Lily Rodríguez, Jorge Luis Martinez, Ulrich Sinsch, Wilfredo Arizabal 2004. Nymphargus phenax. In: IUCN 2014