Yeah, be really, really careful of the drop bears. Just ask a local about them and they'll be able to let you know where the drop bears tend to be in that area.
Otherwise, there's not too much that's dangerous here. Northern Territory there are saltwater crocs - they ARE dangerous. We have the sharks on most coasts, so be careful of them. On the north east coast, we have sea snakes, watch out for them. On land every where there are other snakes, but they tend to not be around cities. Spiders are generally not too bad, you're unlikely to encounter a redback or funnel web. It's really not as bad as people say!