Deadly Feathers by Des Hunt

Noah Larsen lives in the big city, enjoying fast-foods, movies, and heaps of mates. That's until his parents decide to move to Stewart Island. Looking at a map, Noah sees the island as the most desolate place on earth, stuck way down south, almost at the bottom of the world. The reality, when he gets there, is even worse: no fast-food chains, no cinema complex, and not a single boy of his age at the tiny school. But there is a girl, who lives next door: Hailey North, a bossy know-it-all who has a passion for the outdoors and the island's special wildlife.Then Noah sees a spectacular parrot flying over the bush, a South American macaw, a bird that should never be in the New Zealand forest. Soon afterwards he starts seeing sick and dying native parrots, particularly kaka. He and Hailey put the two events together and come up with a theory, linking them to an American lone-sailor whose yacht is anchored in a nearby bay. But without physical evidence nobody believes them.Enter...