Editing Corroboree frog (section)

===Cause for decline===
The main threats to the survival of the frogs are thought to be infection with the [[chytrid]] fungus and [[bushfire]]s.<ref name="Proust 2022"/>

Severe [[bushfires]] in the Victorian and NSW high country in January 2003 destroyed much of the frogs' remaining habitat, especially the breeding sites and the leaf litter that insulates overwintering adults. The fire affected almost all southern corroboree frog habitat, although later surveys showed that the fire resulted in a lower than expected decline in population.<ref>{{Cite journal |last=Worboys |first=Graeme |date=1 August 2003 |title=A Brief Report on the 2003 Australian Alps Bushfires |url=http://dx.doi.org/10.1659/0276-4741(2003)023[0294:abrota]2.0.co;2 |journal=Mountain Research and Development |volume=23 |issue=3 |pages=294–295 |doi=10.1659/0276-4741(2003)023[0294:abrota]2.0.co;2 |issn=0276-4741}}</ref>

The [[2019–2020 bushfires in Australia]] destroyed a significant portion of Kosciusko National Park, and killed two-thirds of the southern corroboree frogs contained in specially designed disease-free enclosures built by conservationists.<ref name="Proust 2022"/>

Other threats to the southern species include residential and commercial development (including [[ski resort]]s); [[climate change]] (causing [[drought]] and fires); and [[pollution]].<ref name=IUCN/>

Other causes such as [[habitat destruction]] from recreational [[4WD]] use; [[Invasive species in Australia|feral animals]]; degradation of the frogs' habitat; and increased UV radiation flowing from [[ozone layer]] depletion.{{fact|date=May 2022}} The drought affects these frogs by drying out their breeding sites so that the breeding cycle, which is triggered by seasonal changes and may require moistening of the bogs in autumn and spring to bring on specific developmental events, is delayed. This may mean that tadpoles have not [[metamorphosis (biology)|metamorphosed]] by late summer when their bogs dry out, and so perish.{{cn|date=March 2022}}