[0] http://www.doc.govt.nz/conservation/native-animals/bats/
[0] http://www.doc.govt.nz/conservation/native-animals/bats/
There are also significant differences ideologically between the societies as a stereotype.
Politically New Zealand and Australia are different, but I think a lot of that difference is due to Australian federation and our electoral systems. If New Zealand were to join as an Australian state and use the Australian system of preferential voting (instant runoff) I think we would see a convergence in politics. I don't see New Zealand joining the Australian federation anytime soon, but if there was a desire it could happen pretty easily.
...when deer population numbers get high, the animals become economically viable to harvest for meat by helicopter, so the WARO (Wild Animal Recovery Operation) flights take off, shoot all that they can, and then export it to Germany, who loves wild venison. The recreational hunters shake their fists at the helicopters, but it keeps the animal numbers at an acceptable level.
A massive project though, getting rid of animals trying to survive is incredibly hard - one of my uncles worked on clearing Motuihe in the Auckland harbour, and they had a hell of a time with the rabbits - when threatened, they go into a 2-week breeding cycle, and were hiding in holes halfway down the cliffs!