The mill's proposed site adjoins a habitat for three endangered marsupials: the Tasmanian devil, the spot-tailed quoll and the eastern barred bandicoot.
Modern mammals divide into three overarching groups: the placentals (most species, including man), the marsupials (kangaroos and their like) and the monotremes (the egg-laying platypus and echidnas).
Other unusual critters, including long-nosed bandicoots, tree kangaroos and ringtail possums, also haunt the crater: roll up after dusk with a flashlight to get a glimpse of these nocturnal marsupials.
In 2010, Vera Weisbecker of Cambridge University and a colleague found a correlation between brain size and dependence across 52 different species of marsupials, from familiar ones like kangaroos and opossums to more exotic ones like quokkas.