It was initially believed that the eruption of Mount Galunggung in 1987 was responsible for a significant portion of this decline due to the loss and degradation of habitat, but at present the decline looks more consistent with chytridiomycosis, as the observed patterns of decline resemble declines of other mountainous stream-breeding amphibians that have been affected by the fungus, but no positive identification of the disease on a bleeding toad has been made.
It was initially thought that the eruption of Mount Galunggung in 1987 caused a substantial portion of this decline due to habitat loss and degradation, but now it appears more consistent with chytridiomycosis. The observed patterns of decline resemble those of other mountainous stream-breeding amphibians affected by the fungus, though no direct identification of the disease on a bleeding toad has been confirmed.