When New Zealand broke away from the great southern supercontinent Gondwanaland some 80 million years ago, birds were abundant. But snakes and land mammals, apart from bats, were absent. It was paradise for the original birds and others that flew or floated here later.
The same qualities that have made many New Zealand birds distinct from others around the world have also helped to make them extinct. Flightlessness and bulk, along with tens of thousands of years living in a predator-free environment, left many bird species vulnerable when they began sharing the islands with humans and introduced predators.



