Palawa children from the Cape Barren Island Primary School - spell out katina (beach) on the sand.
From to the Federation of Aboriginal and Torres Strait Islander Languages (FATSIL) website:
At the time of white settlement there were an estimated 250 distinct indigenous languages in Australia. Over half of these are no longer used. Many of those remaining are known to only a handful of elders and face obvious extinction without urgent steps being taken to record them [...] The 200 years since settlement is a minute fraction of the 40,000 year history of Australia’s native people. But within this tiny window of time, the devastation of an ancient culture and many of its languages has been brutally effective.
The Aboriginal Languages of Australia Virtual Library has compiled an impressive list of online resources available for the study and promotion of indiginous Australian languages. As of the most recent update (May 2005), there are 224 links to vetted resources grouped by type of resource, language, and Australian state. In all, about 70 languages are represented. Links are checked twice a year by the editor, David Nathan, who is also keeping tabs on sites that have gone offline (see his "Practice Statement").