This species is known from both slopes of the western Andes, between Cauca and Risaralda Departments, and on the western slope of the central Andes, in Colombia, between 2,100 and 2,470m asl.
Habitat and Ecology
It occurs on vegetation next to streams in sub-Andean forests. It lays its eggs on leaves above the water and when hatched the tadpoles drop into the stream below where they develop further. It is restricted to gallery forest due to its requirement for overhanging branches for breeding habitat.
It is not a particularly common species.
The major threats are habitat loss, due to agricultural development (including the planting of illegal crops), logging, and human settlement, and pollution resulting from the spraying of illegal crops.
The range of the species includes a few protected areas, such as the Parque Nacional Natural Tatamá.
Fernando Castro, John Lynch, Erik Wild 2004. Nymphargus ruizi. In: IUCN 2014