It inhabits the eastern slopes of the Andes of Colombia, Ecuador, and northeastern Peru.

The dorsum is green with small greenish-white warts.

[3] The natural habitats of Nymphargus posadae are vegetation alongside streams in sub-Andean and Andean forests.

When the eggs hatch, the tadpoles drop into the water below where they develop further.

This species is threatened by habitat loss caused by agricultural expansion, timber extraction, and water pollution.