Australia has other dangers than the Saltwater croc.
Ever heard of the Box Jellyfish? It`s most poisonous creature on earth.You get stung by one morphine won`t help.
Another one is the funnel web spider.A bite will send you into seizures,you then turn blue.Lights out then.
It`s a tough place,beautiful,but tough.
Oz is a lovely place, but like any place you aren't familiar with, it has its' dangers. In my development, guaranteed, every year, a new resident gets a Black Widow sting in fall while bringing in firewood from the back yard.
After the first one, or seeing the first one, you learn to wear work gloves, and look first. . . . (grin)