Australia has really only two poisonous spiders of note, and this is one of them. It is called the Redback (after the red patch you can see on the end of its abdomen). Redback spiders hardly ever kill anyone anymore – the last certified recorded death was in the 1960s (although a bite from one would probably hurt and make you sick).

I found this one under our verandah. We have a lot of them. If I had to choose to have a lot of Redbacks under my house though, I would rather have this kind: