Niue.
Queenslanders are boorish; South Australians are boring. Matter of personal preference, really.
Do you mean Nauru?
Niue is a dependency of New Zealand in Polynesia (New Zealand took over those British colonies that didn't want independence, except for some reason Pitcairn.) Over half of Niue islanders actually live in New Zealand rather than on Niue these days. IIRC NZ's ethnic structure is something like 82% White, 10% Maori, 6% other Polynesian. (And the appropriate racial slur for a new arrival from Polynesia is "fob".)
Anyways, it's the wrong answer. The correct answer is "Australians, esp. Australians' habit of shagging sheep."