- Hi folks. I have one, or possibly two, rats living at my place in suburban Newcastle. I haven't seen two together, but the colouring suggests I've seen two different rats. My house backs onto a bush reserve. The rat(s) had been helping themselves to the contents of my compost bin for some weeks or months until I blocked their access on the weekend. Now I am seeing it/them fossicking every day. It is/they are quite brazen - allowing me to get quite close before scurrying away. Attached is the best photo I could get with my iPhone. Can anyone please tell me if this is a native bush rat or an introduced pest? Thanks, Matt.