Wekas are birds I have only seen when tramping or on the West Coast. They are about the size of a chicken and can be just as damaging to a vegetable garden, so I guess it is lucky we don't have them in Lyttelton.
One of the great things about tramping in New Zealand is that you don't have to worry about animals that might kill you (there are plenty of other things that could kill you when hiking in New Zealand, but none of them are animals). The moa became extinct when humans arrived in New Zealand in the middle of the last millennium. It might not have killed anyone, but it would have frightened the bejeezus out of me to come across it on a walk.