Some Australian migrants have made a small contribution to reversing the flow of traffic across the Tasman.
Thirteen Pelicans have made New Zealand their home, settling on the banks of the Northern Wairoa River, known as the Big Muddy, near Dargaville. The flock is exciting birdwatchers and locals, who would normally be able to see pelicans only in a zoo.
Experts believe the rare visitors could start breeding here and make the Northland river their permanent home.
"Nothing is impossible," said a Massey University zoology lecturer, Dr Phil Battley, who believes the birds made their way here on an "unhelpful wind".
Dr Battley said the birds would need an adequate food supply for several months, and undisturbed sandbanks to nest on.