If you're going backpacking anywhere outside the cities e.g. Milford Sound, Haast, Westland, Mount Cook etc., consider protecting everything you have, especially film in canisters, from kea. The parrots can open canisters, rip the film out then move on to the next form of amusement to them, like windscreen wipers/rubber surrounds, packs that look inviting to peck open and even the beloved NZ invention, the thong is not safe. Keep film with you in tent (with food, too) in whatever form of sturdy protection you can dream up and hope for the best!
you might want to explain which thong you mean, just so we don`t get the wrong idea