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 Mount Galunggung's 1987 eruption caused a substantial portion of this decline due to habitat loss and degradation. However, current evidence points more towards chytridiomycosis as the cause for the observed patterns in mountainous stream-breeding amphibians, despite no positive identification on a bleeding toad.