Yes you read that correctly… Australia -does- have native rats. While Rattus rattus (Roof Rat) and Rattus norvegicus (Norway rat) are the ones most people know about, they are -not- native Australian rats. They were introduced to Australia and are considered feral pests. Many of Australia’s native rats are on the endangered list which is a crying shame. The introduction of non-aboriginal humans and other non-native animals has reduced some of these species to nearly extinct.
Note: I used to be a small-time breeder of rats but due to quite severe allergies to rat dander, especially in Summer, I’ve had to rehome most of them which was very depressing. I’ve got a small but growing population of mice now, and their dander/litter/hair doesn’t manage to get all over the house so they are manageable. I will begin breeding a few mouse litters in a while, but will only ever have one litter on the go at a time so that my allergies don’t object too much.