Two-hundred-and-fifty Australian scientists have written an open letter to Prime Minister Scott Morrison today, warning that Australia is in the midst of an "extinction crisis" and calling on him to strengthen Australia's environment laws.
The scientists have timed their letter to coincide with a Federal review of Australia's key environmental protection law.
They say that government action is urgently needed to stop the destruction of habitat that is now threatening even once common native animals like koalas.
For more on this, The World Today speaks to Dr James Watson, a professor of Conservation Science at the University of Queensland.
He also serves on the International Panel for Biodiversity and Ecosystem Services and is a Research Fellow for the United Nation's Environment Program.