
Expats come to Australia with the worry of spiders, snakes, sharks, jelly fish and other animals / pests that will mess you up. In Perth my experience is that you need to worry about ants. Ants are everywhere in Perth...I might go so far as to say that Perth is one gigantic ant hill.
The last house we were in, a company provided McMansion that was only 3-5 years old really never had any issues on the inside. They were brutal...