When Ned Kelly appeared out of the fog at Glenrowan wearing his armour (which made him look like he didn't actually have a head) 'Bunyip' was one of the theories put forward by the police looking in horror. Mind you, I doubt they said calmly 'Oh here comes a bunyip' - even if I knew exactly what they said I doubt I could repeat it here. So you might argue that the last bunyip died at 10am on 11/11/1880.