Koala numbers are believed to have been in the millions before the arrival of
  British settlers but are now estimated to vary from about 200,000 to as few
  as 43,515. Widespread hunting and slaughter of the animals for their furs in
  the early twentieth-century devastated the species.
A leading koala scientist, Professor Alistair Melzer, from the University of
  Central Queensland, said the listing was “a big step forward” but
  further measures were needed to prevent deaths from cars and dog attacks in
  urban areas.
“The listing alone will not save the koala,” he told Fairfax media.
“It’s basically a label that says we’ve got to a point where koalas are
  in serious trouble and need careful management if they’re going to survive.”