We do have the Redback spider and a single one of those shut down a major Japanese port.
Murder chickens so tough we lost a war against them
Kangaroos that will lean back and then gut you with their claws
Snakes, lots of different kinds, mostly bitey but some will strangle you
Sharks, bitey ones
Wednesdays we have feral lions (and stinky bins that need to be put out)
The plants are tough, spiny or poisonous. Some are tough, spiny and poisonous. I have used ummm… impolite language when I have brushed up against some of the spiny ones. They are sharp
Quokkas are nice…