One of the few high-altitude freshwater lagoons in New South Wales. An unusual system, as lagoons are not usually found in fluvial landscapes at the extreme upper limit of streams. The Site is rare due to its near-natural condition and is particularly important as a drought refuge for waterbirds. It also regularly supports significant numbers of various waterbirds such as the blue-billed duck (Oxyura australis) and the Eurasian coot (Fulica atra). Several birds, plants and amphibians found at the Site are rare, threatened or endemic such as the globally endangered Australasian bittern (Botaurus poiciloptilus) which breeds at the Site. Vegetation includes submerged and emergent aquatic plants, sedge meadows and terrestrial communities. Archaeological surveys show Aboriginal activity dating back to at least 5,000 years ago. Human activities consist of livestock grazing, some cropping, nature conservation with limited recreational use and scientific research. Public access is restricted to researchers, birdwatchers and educational institutions.