 Most notable recent floods were those of April 1990 and June 2007.These floods are usually caused by severe weather systems in the Gippsland region that also flood other nearby rivers such as the Thomson and Avon rivers in the West Gippsland catchment.The tributary rivers have a very large population of Australian grayling, which is listed as a vulnerable species by the Department of Sustainability and Environment, and has a very high conservation value.