Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Queanbeyan Nature Reserve likely to have become extinct since they were first recorded. Remnant populations are now usually restricted to roadsides, travelling stock reserves, cemeteries railway easements and the occasional private landholding. Within NSW, natural populations of Button wrinklewort are formally conserved within Queanbeyan Nature Reserve, Crace Grassland Reserve (part of the Canberra Nature Park) and the Red Hill Section of Canberra Nature Park. As a consequence, Button wrinklewort is listed as endangered under the "Threatened Species Conservation Act 1995" (NSW) and as endangered under the "Environment Protection and Biodiversity Conservation Act 1999" (Cth). The Golden Sun Moth "Synemon plana" is a medium-sized,