This species is found in the mountains of Mindanao and Dinagat Islands, in the Philippines.
Habitat and Ecology
It inhabits cool mountain streams and rivers in montane rainforest where it also breeds and the larvae develop.
It is fairly common where it occurs, but it has a patchy distribution.
This species inhabits high-elevation forests, which are generally less threatened by habitat conversion, agriculture, and human encroachment, and the pollution of streams and rivers. Regardless, some populations of this species are subject to these threats.
It is known from several protected areas, including Mount Malindang National Park. Conservation measures must include the regulation and proper disposal of pesticides and herbicides, and the protection of the remaining rainforest, especially high-elevation riverine habitats and gallery forests, on Mindanao. The taxonomic status of this species requires further study.
Arvin Diesmos, Angel Alcala, Rafe Brown, Leticia Afuang, Genevieve Gee, Katie Hampson, Mae Leonida Diesmos, Aldrin Mallari, Perry Ong, Dondi Ubaldo, Baldwin Gutierrez 2004. Ansonia muelleri. In: IUCN 2014