A fenced-off national park in Australia will provide a safe habitat for the threatened bilby.

Keeping cats and foxes out of such a space requires maintenance. A few decades from now, if civilization is too hard pressed, people will let those fences fall apart, and cats and foxes will kill the bilbies.

Perhaps before that happens it will be possible to wipe out the feral cats and foxes in Australia, as well as the cane toads and rabbits, and other introduced species that shouldn't be there.

Might it be possible to clone the extinct lesser bilby?